Answer:
C. One solution
Step-by-step explanation:
You want to know the number of solutions of a system of equation such that the graph of the linear function touches the graph of the quadratic function at its minimum.
SolutionsThe number of real solutions of the system of equations is equal to the number of points of intersection of their graphs. The problem statement tells you the graphs intersect at one point, so there is one solution.
__
Additional comment
The linear function can only touch the minimum of a quadratic if its graph is a horizontal line.
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(a) Grogg is ordering pizza from a local pizzeria, which offers ten different toppings: pepperoni, mushrooms, sausage, onion, olives, green peppers, pineapple, spinach, garlic, and hummus (an favorite). For any pizza, any combination of toppings is possible, including no toppings. How many different pizzas can Grogg order, if Grogg must order at least five toppings?
(b) Lizzie hears about Grogg's plans, and is also interested in ordering a pizza. For variety, they agree to order one pizza each so that they have no toppings in common. In how many different ways can Lizzie and Grogg order their pizzas, if each pizza must have at least three toppings?
(c) It turns out Winnie is also interested in ordering a pizza! Lizzie and Grogg still agree that their pizzas can't have any toppings in common, but Winnie will include a topping on her pizza only if it appears on Grogg's pizza or Lizzie's pizza (but she doesn't have to include it). In how many different ways can Grogg, Lizzie, and Winnie order their pizzas, if Lizzie's pizza must have at least four toppings, and Grogg's pizza must have at least one topping?
You may leave your answers in exponential form.
Using the combination formula, the number of ways to order the pizzas in each case is given as follows:
a) 638 ways if Grogg must order at least five toppings.
b) 937,024 ways if each pizza must have at least three toppings.
c) 1024 ways if Lizzie's pizza must have at least four toppings and Grogg's must have at least one topping.
What is the combination formula?[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula, involving factorials.
[tex]C(n,x) = \frac{n!}{x!(n-x)!}[/tex]
For this problem, the order of the toppings is not important, which is why the combination formula is used.
Hence the numbers of pizzas from 0 to 10 toppings are given as follows:
0 toppings: C(10,0) = 1.1 topping: C(10,1) = 10.2 toppings: C(10,2) = 45.3 toppings: C(10,3) = 120.4 toppings: C(10,4) = 210.5 toppings: C(10, 5) = 252.6 toppings: C(10, 6) = 210.7 toppings: C(10, 7) = 120.8 toppings: C(10, 8) = 45.9 toppings: C(10, 9) = 10.10 toppings: C(10,10) = 1.In item a, Greg must order at least five, hence the number of ways is:
252 + 210 + 120 + 45 + 10 + 1 = 638 ways.
In item b, each must have at least three toppings, hence the number of ways for each is:
120 + 210 + 252 + 210 + 120 + 45 + 10 + 1 = 968 ways.
968 ways for each, two people, hence, by the Fundamental Counting Theorem, the number of ways is:
968² = 937,024 ways.
In item c, the number of ways is the sum of all the possible toppings, except zero, from the conditions given, hence:
1 + 10 + 45 + 120 + 210 + 252 + 210 + 120 + 45 + 10 + 1 = 1024 ways.
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Find the zeros of each function by using a graph and a table f(x)=x^2+3x-18.
1) Finding the zeros of this function f(x) =x² +3x -18
f(x) = x²+3x-18 Factoring this equation, and rewriting it
Which two numbers whose sum is equal to 3 and their product is equal to 18?
6 -3 = 3 and 6 *-3 = -18
So we can rewrite as (x +6) (x-3)
(x+6)(x-3)=0 Applying the Zero product rule, to find the roots
x+6=0,
x=-6
x-3=0,
x=3
S={3,-6}
2) Setting a table, plugging in the values of x into the factored form: (x-6)(x-3)
x | y |
1 | -14 (1 +6)(1-3) =-14
2 | -8 (2 +6)(2-3) =-8
3 | 0
4 | 10
-5 | -8
-6 | 0
3) Plotting the function:
a path bounds a circular lawn at a park. if the inner edge of the path is 132 ft. around, approximate the amount of area of the lawn inside a circular path
A path bounds a circular lawn at a park. if the inner edge of the path is 132 ft. around, Approximate the amount of area of the lawn inside a circular path ?
CIRCULAR LAWN
Inner edge Perimeter = 132 feet
2 x pi x r = 132
2 x 22/ 7 x r = 132
r = 132 / ( 2 x 22/ 7 )
r = 132 x 7 / 44
r = 924 / 24
r
math 38 help please
8) I
8.2)
[tex]\begin{gathered} \sqrt[3]{x+4}=5 \\ \left(\sqrt[3]{x+4}\right)^3=5^3 \\ x+4=125 \\ x+4-4=125-4 \\ x=121 \\ Verify: \\ \sqrt[3]{121+4}=5 \\ \sqrt[3]{125}=5 \\ 5=5\:True! \end{gathered}[/tex]hus , the answer is x=121
I will give brainliest, like and rating if u solve this right
Which of the following statements is not true?
Answer:
Answer C
This statement is not true
Step-by-step explanation:
Logarithms result in real values only for positive values of the argument i.e. log(x) results in a real value only for x > 0 So A is correct
Range is set of all real numbers -∞ < x < ∞ So B is correct
D is also correct. At x = 0, log is not defined
Only C is incorrect. If 0 < a < 1 the graph actually shows a downward trend ie logarithmic decline instead of growth
Please answer quick and i’ll transfer you money please quick
A bank account gathers compound interest at a
rate of 5% each year.
Another bank account gathers the same amount of
money in interest by the end of each year, but
gathers compound interest each month.
If Cameron puts £4200 into the account which
gathers interest each month, how much money
would be in his account after 2 years and
7 months?
Give your answer in pounds to the nearest 1p.
Based on the compound interest rate on the bank account and the number of months that Cameron invested the amount for, the money in his account will be £4,777.81
What amount will be in the account?The amount that will be in the account after 2 years and 7 months can be found by the formula:
= Amount invested x ( 1 + periodic rate) ^ number of periods
The number of months (periods) is:
= 2 years + 7 months
= 31 months
The periodic rate is:
= 5% / 12 months a year
= 5/12%
The amount that Cameron will have in his bank account after 2 years and 7 months will be:
= 4,200 x (1 + 5/12%)³¹
= £4,777.81
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Think about your answers to these questions. Then write a summary of your findings below.1. How do you decide which of two numbers is greater when...a. both numbers are positive?b. both numbers are negative?c. one number is positive and one number is negative?
1. a)
Given:
Both numbers are positive.
Aim:
We need to find which one of the two numbers is greater than the other.
Explanation:
On a number line, numbers always increase so numbers to the right are greater than numbers to the left.
Mark the given points on the number line and find which number is right of another. numbers to the right are greater than numbers to the left.
For example.
The positive numbers are 17 and 20.
20 to the right are greater than 17 to the left
20 is greater than 17.
1. b)
Given:
Both numbers are negative.
Aim:
We need to find which one of the two numbers is greater than the other.
Explanation:
On a number line, numbers always increase so numbers to the right are greater than numbers to the left.
If both numbers are negative, the number closer to zero is the bigger number.
For example.
The negative numbers are -10 and -5.
-5 is closer to zero.
-5 is greater than -10.
1, c).
Given:
one number is positive and one number is negative
Aim:
We need to find which one of the two numbers is greater than the other.
Explanation:
On a number line, numbers always increase so numbers to the right are greater than numbers to the left.
The positive numbers are always to the right are greater than the negative numbers to the left.
Positive numbers are greater than negative numbers.
For example.
The positive number is 5 and the negative number is -8.
5 is greater than -8.
How do u know somthing is a proportional relationship
Answer: You can tell if a table shows a proportional relationship by calculating the ratio of each pair of values. If those ratios are, all the same, the table shows a proportional relationship.
I have to find out at which points the lines intersectY= .5x+3 & Y= 2x-9
SOLUTION
We want to find out at which points the lines
[tex]\begin{gathered} y=0.5x+3\text{ and } \\ y=2x-9 \end{gathered}[/tex]intersect.
To do this, we have to solve the equations simultaneously and look for the values of x and y.
This becomes
[tex]\begin{gathered} y=0.5x+3\ldots\ldots\ldots\text{.}\mathrm{}eq\text{ 1} \\ y=2x-9\ldots\ldots\ldots\ldots\text{.}\mathrm{}eq\text{ 2} \\ \text{subtracting equation 2 from 1, we have } \\ y-y=(0.5x-2x)+(3-(-9) \\ 0=-1.5x+(3+9) \\ 1.5x=(3+9) \\ 1.5x=12 \end{gathered}[/tex]Dividing both sides by 1.5, we get x, this becomes
[tex]\begin{gathered} \frac{1.5x}{1.5}=\frac{12}{1.5} \\ x=8 \end{gathered}[/tex]To get y, we substitute the x for 8 into equation 1 or 2. Let us use equation 1, we have
[tex]undefined[/tex]Drag numbers to the table so it shows a proportional relationship between x and y.
The numerical values (numbers) which makes the table show a proportional relationship between x and y are as follows:
x y___
2 0.6
5 1.5
8 2.4
What is a proportion?A proportion can be defined as an equation which is typically used to represent (indicate) the equality of two (2) ratios. This ultimately implies that, proportions can be used to establish that two (2) ratios are equivalent and solve for all unknown quantities.
Mathematically, a direct proportion can be represented by the following equation:
y = kx
Where:
y and x are the variables.k represents the constant of proportionality.Next, we would determine the numerical value of the constant of proportionality (k) as follows:
y = kx
k = y/x
k = 0.6/2
k = 0.3
When y = 1.5, the value of x is given by:
x = y/k
x = 1.5/0.3
x = 5.
When y = 2.4, the value of x is given by:
x = y/k
x = 2.4/0.3
x = 8.
In conclusion, the values of x are 5 and 8 while the value of y is 2.4.
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2. Let S = R - {0}, with the wacky definitions of vector addition and scalar multiplication given below.
Verify or disprove that S is a Vector Space.
For x, y in S, the definition:
Vector Addition: x + y = xy
• Scalar Multiplication: c*x = x^C.
(ie. 2+5= 2*5 = 10)
Hint: First identify the additive identity
A vector space, also known as a linear space, is a set whose elements, frequently termed vectors, can be added to and multiplied ("scaled") by figures known as scalars. Real numbers make up scalars most of the time, but they can also be complex numbers or, more broadly, components of any field.
Varied SpacesEvery vector space has a scalar field F at its foundation (to be specified shortly).
Real and complex numbers are two examples of scalar fields.
Real numbers R:
C: Complex numbers.
We only utilize these fields in this context.
Definition : A group of objects in a vector space V have a (vector)
scalar multiplication defined as closed under both addition and multiplication
also satisfying the following axioms:
I For any x V and, F, ( + )x = x + x
(ii) α(βx)=(αβ)x
(iii) For all x, y V, x + y = y + x
(iv) For any x, y, and z > V, x + (y + z)=(x + y) + z.
(v) α(x + y) = αx + αy
(vi) O V z 0 + x = x, where 0 is commonly referred to as the origin
Since V cannot be left using vector addition or scalar multiplication, the "closed" criterion described above states that for any, F and x, y V x + y V. Additionally, the "+" is in the field when we write for, F and x V ( + )x, but it is in the vector space when we write for x + y for x, y V. This symbol has a variety of uses.
Examples.(1) R2 is equal to the two-dimensional space (a1, a2) | a1, a2 R.
(2) In an n-dimensional space, Rn = (a1, a2,..., an) | a1, a2,..., an.
An "n-tuple" is (a1, a2,...,an).
(3) C, the field of complex numbers, to C2 and Cn, respectively, to R2 and Rn.
Pn = l n j = 0 ajxj | a0,
The polynomial space of all polynomials of degree n is denoted as Pn = l n j=0 ajxj | a0, a1,...,an R M. Be aware that this covers polynomials of all degrees, not only those with n degrees exactly.
(5) fp = (ai,...) | ai p, |ai| R. Vectors in the form of infinite-tuples of numbers make up this space. To properly designate the field, we would write fp(R) or fp(C).
Trigonometric polynomials TN = F N n=1 a sin nx | a1,...,an R k are included in the list.
Typical vecs in Rn e1 = (1, 0,... , 0)
e2 = (0, 1, 0,... , 0) (0, 1, 0,... , 0)
e3 = (0, 0, 1, 0,... , 0) (0, 0, 1, 0,... , 0)
.\s.\s.\sen = (0, 0,... , 0, 1) (0, 0,... , 0, 1)
The unit vectors that point in the n orthogonal directions are those.
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(a) Give an example of an angle which is coterminal with 260°.
(b) State the reference angle associated with 260°.
(b) Convert 260° to radians. Leave the answer in terms of
π .
a) 620° is an angle coterminal to 360°. The reference angle associated with 260° is 260°.
b) The measure of 260° in radian system equals to 13π / 9 radians.
How to analyze coterminal angles
Two angles are coterminal when they share the same initial and terminal sides. Two consecutive coterminal angles have a difference of 360° (2π radians). Then, we can find any angle of a family of coterminal angles by using this formula:
θ' = θ + i · 360°
Where:
θ - Reference angle, in degrees.i - Angle index.a) If we know that θ = 260° and i = 1, then the measure of an example of coterminal angle is:
θ' = 260° + 1 · 360°
θ' = 620°
620° is an angle coterminal to 360°.
The reference angle is the angle whose measure is equal to or greater than 0° and equal to or less than 360°. Thus, the reference angle associated with 260° is 260°.
b) According to radian system, 2π radians are equal to 360°. Thus, the measure of 260° is found by the following simple rule of three:
x = 260° × 2π / 360°
x = 13π / 9 rad
The measure of 260° in radian system equals to 13π / 9 radians.
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A marksman has a probability of 0.322 for hitting a certain long-range target. What is the probability that it takes 3 shots for the marksman to hit the long-range target? (Round your answer to three decimal places, if necessary.)
The required probability would be 0.146 that it takes 3 shots for the marksman to hit the long-range target.
What is probability?The probability is defined as the possibility of an event being equal to the ratio of the number of favorable outcomes and the total number of outcomes.
A marksman has a probability of 0.322 for hitting a certain long-range target which is given in the question.
It takes the marksman 3 shots to hit the long-range target = P(E)
Required probability = P(E)
Here no long-range hits in the 1st two shots = (E₁)
And a long-range hit on the 3rd shot = (E₂)
P(E) = P( (E₁) and (E₂))
P(E) = (1 - 0.288) (1-0.288)(0.288)
P(E) = 0.146
Therefore, the required probability would be 0.146 that it takes 3 shots for the marksman to hit the long-range target.
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Write the following expression using a single exponent. 7^(4))^(3) x7^(7)
Answer:
7⁷¹
Step-by-step explanation:
Let's do it this way
7⁴^³ × 7⁷
Let's firstly apply indices since the base is the same
7⁴^³+ (⁷)
(4³ = 4×4×4 can be rewrite)
7⁴×⁴×⁴ + ⁷
7⁶⁴+⁷
= 7⁷¹
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Answer:
Raise 7 to the power of 4
Step-by-step explanation:
2401
A system of inequalities is shown.Which system is represented in the graph? y > –x2 – x + 1y < 2x2 + 3 y ≤ x2 – x + 1y < 2x2 + 3 y ≥ x2 – x + 1y ≤ 2x2 + 3 y ≥ –x2 – x + 1y > 2x2 + 3
The system of inequatilies that is represented in the graph is:
y ≥ –x² – x + 1
y > 2x² + 3
We can confirm this statement since the first equation implies that the system doesn't include any point bellow the parabola y = -x² - x + 1, and the second equation implies that the system must include only points above the parabola y = 2x² + 3
Use the number line to find the coordinate of P that represents the weighted average of the set of points such that Point C has a weight of 3, and point E has a weight of 5.
Using the number line to find the coordinate of P that represents the weighted average of the set of points we see that the value of 6 represents the weighted average of the coordinates.
How exactly does one determine the weighted average?The ordinary arithmetic mean is comparable to a weighted arithmetic mean. The primary difference between the two is that the weighted arithmetic mean takes into account the fact that not all of the data points contribute the same amount to the overall average; rather, some data points contribute more than others.
Generally, the equation for Average weight is mathematically given as
[tex]Av=\frac{ (3 * 2 + 8 * 3)}{(2 + 3)}[/tex]
Consider the quotient in question.
Average weight = 6
As a direct result of this, the value 6 was determined to be the weighted average of the coordinates.
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the volume of a volleyball is 288 cubic inches. What is the radius of the volleyball, to the nearest tenth of an inch?
The radius of the volleyball to the nearest tenth of an inch is 8.3
How to calculate the radius of the volleyball ?The formula is
= √ 3v/4π
volume(v) = 288
π = 3.142
= √ 3×288/4×3.142
= √ 864/12.6
Next step is to get the square root of 68.6
= √ 68.6
= 8.29
Hence the radius of the volley ball is 8.3 inches
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If ABC is reflected across the z-axis to get the AA'B'C', what is the y-coordinate of C'? Enter the answer in the box.
The horizontal and vertical axes are the two axes of the coordinate plane.
The origin is the location where these two axes come together. What is the y-coordinate of C' if ABC is mirrored across the z-axis to produce AA'B'C'?
Answer :
(-3,2)
Detailed explanation:
The right response is C (-3,2). The bold line moving up and down in the middle of the page is the y axis. If you could take up the triangle and turn it on its side, you could. In Point C's landing zone (-3,2).
Point C is situated two spaces to the right of the y-axis, as you can also see. The x axis is still three spaces below it.
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Find the sum. 2 3/6 + 4 1/6
Answer:
6 4/6
Explanation:
To sum 2 3/6 and 4 1/6, we first need to convert the mixed numbers to fractions as follows
[tex]\begin{gathered} 2\frac{3}{6}=\frac{(2\times6)+3}{6}=\frac{12+3}{6}=\frac{15}{6} \\ 4\frac{1}{6}=\frac{(4\times6)+1}{6}=\frac{24+1}{6}=\frac{25}{6} \end{gathered}[/tex]Now, we can add the numbers as
[tex]\frac{15}{6}+\frac{25}{6}=\frac{15+25}{6}=\frac{40}{6}[/tex]Finally, when we divide 40 by 6, we get 6 as a quotient and 4 as a remainder, so 40/6 is equivalent to
[tex]6\frac{4}{6}[/tex]Therefore, the answer is 6 4/6
in exercises 9-12 assume that 59 births are randomly selected. use subjective judgment to describe the given number of girls as a) significantly low, b) significantly high or c) neither significantly low nor high.
9. 47 girls.
10. 26 girls.
11. 23 girls.
12. 5 girls.
About 2% of the population has a particular genetic mutation. 500 people are randomly selected.
Find the standard deviation for the number of people with the genetic mutation in such groups of 500
The standard deviation for the number of people with the genetic mutation in such groups is 3.1305.
Standard DeviationIn statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean of the set, while a high standard deviation indicates that the values are spread out over a wider range.
Let X be the number of people with genetic mutation is a group of 500,
The formula of standard deviation is given as
[tex]SD=\sqrt{n*p(1-p)} \\SD=\sqrt{500*0.02*0.98} \\SD=3.1305[/tex]
The standard deviation of the given sample is 3.1305
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There are 5 more girls than boys in MS, Rabu's class of 31 students, What is the ratio of number of girls to the number of boys in her class?
Answer: The answer is 18 Girls and 13 Boys. (18 + 13 = 31)
The ratio for girls to boys would 18:13
Step-by-step explanation: Confirmed correct.
Olivia has 5 sundaes for her friends. She has 15
5
6
ounces of sprinkles to put equally on the sundaes. How many ounces of sprinkles will be on each sundae?
40 POINTS!
1. Find the missing angle.
2. What is the measure of Angle 1?
3. What is the measure of Angle 2?
4. Can the measure of an exterior angle of a triangle ever equal the measure of its adjacent interior angle? Explain in 2-3 sentences.
Answer:
43 for the first one
Step-by-step explanation:
108+29=
43
Work out the size of angle A.
A
B
11 cm
38°
9 cm
C
please help i am struggling
By using the equations of sides and angles and congruence properties, the values of x and y are equal to 34 and 8, respectively. (Correct choice: A)
How to find the values of the variables associated with two congruent trianglesHerein we find two triangles that are congruent when the share the same sides and angles in magnitudes and distribution. As triangle CDE and triangle LMN are congruent, then we have following relationships:
DE = LN (1)
CE = MN (2)
m ∠ D = m ∠ L (3)
m ∠ C = m ∠ M (4)
By (1):
2 · y + 1 = 17
2 · y = 16
y = 8
By (2):
MN = 4 · 8 - 3
MN = 29
By (3):
x + 17 = 51
x = 34
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Need help with this
Given:
You have $1000 to invest a year and have an account earning 4% compound continuously.
Required:
How much money will you have at the end of the year.
Explanation:
We know the formula for continuously compound interest is
[tex]P(t)=P_0e^{rt}[/tex]Here,
[tex]\begin{gathered} P(t)=\text{ Value at time t} \\ P_0=\text{ Original principal sum} \\ r=\text{ annual interest rate} \\ t=\text{ Length of time the interest is applied } \end{gathered}[/tex]We have initial amount $1000, annual interest rate 4% and length of time 1 year
.
Now,
[tex]\begin{gathered} P(t)=1000\times e^{0.04\times1} \\ P(t)=1040.81 \end{gathered}[/tex]Answer:
So, $1040.81 money will have at the end of the year.
5x - 9 = -5x - 2
X = ?
[tex]5x + 5x = - 2 + 9 \\ 10x = 7 \\ \frac{10x}{10} = \frac{7}{10} \\ x = \frac{7}{10} [/tex]
ATTACHED IS THE SOLUTION
If (m-1/m) = 3, find the value of m³-1/m³
⇒The trick here is to find the value of m first using the equation given.
[tex]\frac{m-1}{m} =3\\m-1=m(3)\\m-1=3m\\m-3m=1\\-2m=1\\\frac{-2m}{-2}=\frac{1}{-2} \\m=-\frac{1}{2}[/tex]
⇒Note I used cross multiplication to solve for m
Now to find what [tex]\frac{m^{3} -1}{m^{3} }[/tex] substitute the value of m in the expression and simplify.
[tex]=\frac{(-\frac{1}{2}) ^{3} -1}{(-\frac{1}{2} )^{3} } \\\\=\frac{-\frac{1}{8}-1 }{-\frac{1}{8} } \\=\frac{-\frac{9}{8} }{-\frac{1}{8} } \\=9[/tex]
⇒The value is 9
Goodluck!!
On a piece of paper, graph y ≥ 2x – 3. Then determine which answer choice matches the graph you drew.
Answer:
Step-by-step explanation:
We are asked to graph an inequality . y≥2x - 3
The boundary line of our given inequality will be a solid line as we have greater than or equal to ≥ sign.
The boundary line of our given inequality would be .y=2x - 3
Now, we will test point (0,0) to shade in the correct region as:
0≥2(0)-3
0≥0-3
0≥-3
It should look something like this: