a=2cm. b=50cm. x=?
x=b:a. x=50:2. x=25
Which relation represents a function?
The relation that represents a function is the mapping in: B.
How to Determine if a Relation is a Function?A relation is defined as a function if each of the x-value (domain element of input) in the relation corresponds to exactly one y-value (range element of output).
The relation in option A is not a function because it has two different y-values, 7 and 5 that corresponds to an x-value, 6. The relations in option C and D do not represent a function also.
The mapping in option B shows a relation where each x-value (domain element) is related or corresponds to only one y-value (range element). Therefore, it is a function.
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The enrollment for a school in 2010 was 1245 students. in 2020, the enrollment was 715 students. find and interpret the rate of change in enrollment from 2010 to 2020
The rate of change in enrollment from 2010 to 2020 is -53 students per year.
Interpretation:
A negative rate of change (-53 students per year) means that the enrollment in the school decreased over the 10-year period from 2010 to 2020. On average, the school lost 53 students per year during this time frame. This decline in enrollment may have implications for the school's resources, budget, and programs, as it indicates a reduction in the student population over the given period.
Here, we have,
To find the rate of change in enrollment from 2010 to 2020, we can use the formula for calculating the rate of change:
Rate of change = (Change in enrollment) / (Time interval)
Where:
Change in enrollment = Enrollment in 2020 - Enrollment in 2010
Time interval = Year in 2020 - Year in 2010
Let's calculate the rate of change:
Change in enrollment = 715 - 1245 = -530
Time interval = 2020 - 2010 = 10 years
Rate of change = (-530) / 10 = -53
The rate of change in enrollment from 2010 to 2020 is -53 students per year.
Interpretation:
A negative rate of change (-53 students per year) means that the enrollment in the school decreased over the 10-year period from 2010 to 2020. On average, the school lost 53 students per year during this time frame. This decline in enrollment may have implications for the school's resources, budget, and programs, as it indicates a reduction in the student population over the given period.
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Mathematics Diagnostic Assessment
Maria wants to add to her CD collection. If a CD costs $8, which expression shows the cost of d CDs?
OA. 8 + d
OB. 8-d
OC. 8-d
OD. 8x d
Carlson Middle School has a total of 500 students in sixth, seventh, and eighth grades. The table below shows the number of students in each grade.
Grade Number of Students
Sixth 203
Seventh 126
Eighth 171
The principal randomly selects 25 students to receive a free school lunch today. What is the most likely number of sixth graders in the group of 25 selected by the principal?
There is also a picture down below
Answer: Around 10 sixth graders would get free lunch.
Step-by-step explanation: first, divide 500/25 to find the percentage of students receiving free lunches. You should get 0.05, or 5%. Then, multiply the number of sixth graders (203) by 5%. Your answer is 10.15, rounded down to 10. (Because it is impossible to have 0.15 of a student)
What’s x??
Solve for X
5x-9=3x+3
Answer:
x = 6
Step-by-step explanation:
5x - 9 = 3x + 3 ( subtract 3x from both sides )
2x - 9 = 3 ( add 9 to both sides )
2x = 12 ( divide both sides by 2 )
x = 6
The Smith and Jones manufacturing company keeps a third of its cash in the bank, which pays 0.5% interest, and the other two-thirds in long-term investments that give 3.5% interest. If the company earned a total of $37,500 in interest last year, how much cash did they keep in the bank?
If the company earned a total of $37,500 in interest last year, how much cash did they keep in the bank is; $937,500.
How to solve Algebra Word Problems?This is about the concept of compound interest which is defined as the interest on savings that is calculated on both the initial principal and the accumulated interest from previous periods.
From the question, let us make x to represent the amount of cash.
Now, we are told that one portion of it pays 0.5%and as such this will be 0.005x.
Now, the other portion pays 3.5% and as such this is 0.035x.
Combining both knowing that the total the company earned in the last year was $37,500 and we have;
0.005x + 0.035x = 37500
0.040x = 37500
Solve for x to get;
x = (37500)/(0.04)
x = 937500
Therefore, the company started with $937,500.
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Charis invested 140$ . She earned a simple interest of 3%per year on the initial investment. If no money was added or removed from the investment, what was the amount of interest Charis received at the end of two years?
The amount of interest would be $8.4 Charis received at the end of two years.
What is the simple interest?Simple interest is defined as interest paid on the original principal and calculated with the following formula:
S.I. = P × R × T, where P = Principal, R = Rate of Interest in % per annum, and T = Time, usually calculated as the number of years. The rate of interest is in percentage r% and is to be written as r/100
We have been given data as:
Principal (P) = $140
Rate of Interest (R) = 3% = 3/100 = 0.03
Time (T) = 2 years
⇒ Simple interest = P × R × T
Substitute the value of P, R, and T in the above formula,
⇒ Simple interest = 140 × 0.03 × 2
⇒ Simple interest = $8.4
Therefore, the amount of interest would be $8.4 Charis received at the end of two years.
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In angle L M N the measure of angle L is equal to the measure of angle M. The measure of angle N is twice the measure of angle M. Find the measure of each angle in angle L M N
The measure of ∠M and ∠L is 45 degrees. then the measure of ∠N is 90 degrees.
How does an angle form?An angle requires two straight line/ line segments/rays, such that they're connected on one of their endpoints. The point of their joint is called vertex of that angle. Those two line segments forming it are called arms of that angle. The angle is the degree of rotation that it will take for the moving side to go from initial side to the position it is currently on.
Given that the angle L M N the measure of angle L is equal to the measure of angle M.
∠L = ∠M
Also, the measure of angle N is twice the measure of angle M.
∠N = 2∠M
The measure of each angle in angle L M N would be;
∠L + ∠M + ∠N = 180
∠M + ∠M + 2∠M = 180
4∠M = 180
∠M = 180/4
∠M = 45
∠M = ∠L = 45 degrees
∠N = 2 x 45 = 90
Therefore, the measure of ∠M and ∠L is 45 degrees. then the measure of ∠N is 90 degrees.
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A cylindrical hollow metal pipe is 16 cm long.
It has an external diameter of 10 cm and an internal diameter of 8 cm.
The density of the metal from which the pipe is made is 8 grams per cm3
What is the mass of the pipe in grams?
Answer:
3617.28 grams
Step-by-step explanation:
Find the volume of the metal as following:
[tex]V_{metal}=V_{external}-V_{internal}[/tex][tex]V_{external} = \pi d_{external}^2h/4=\pi *10^2*16/4=1256[/tex] cm³[tex]V_{internal} = \pi d_{internal}^2h/4=\pi *8^2*16/4=803.84[/tex] cm³[tex]V_{metal}=1256-803.84 = 452.16[/tex] cm³Find the mass:
[tex]mass = volume*density[/tex][tex]mass = 452.16*8=3617.28[/tex] gramsAnswer:
3619.1 grams (nearest tenth)
Step-by-step explanation:
Volume of a cylinder
[tex]V=\pi r^2 h[/tex]
where:
r is the radius.h is the height.The radius of a circle is half its diameter.
Find the volumes of the external and internal cylinders by substituting the given values into the formula for volume of a cylinder:
[tex]\implies \textsf{Volume of the external cylinder}&=\pi \cdot 5^2 \cdot 16=400 \pi \; \sf cm^3[/tex]
[tex]\implies \textsf{Volume of the internal cylinder}&=\pi \cdot 4^2 \cdot 16=256 \pi \; \sf cm^3[/tex]
Find the volume of the cylindrical hollow metal pipe by subtracting the volume of the internal cylinder from the volume of the external cylinder:
[tex]\begin{aligned}\implies \textsf{Volume of the metal pipe}&=\sf Volume_{external}-Volume_{internal}\\&=400 \pi - 256 \pi\\& = 144 \pi \sf \; cm^3\end{aligned}[/tex]
Density formula
[tex]\rho=\dfrac{m}{V}[/tex]
where:
ρ = densitym = massV = volumeGiven:
ρ = 8 g/cm³V = 144π cm³Substitute the given values of density and the found volume into the density formula and solve for m:
[tex]\begin{aligned}\implies \rho&=\dfrac{m}{V}\\8&=\dfrac{m}{144 \pi}\\m&=8 \cdot 144\pi\\m&=1152 \pi \\m&=3619.11473...\\m&=3619.1\; \sf g \;(nearest\;tenth)\end{aligned}[/tex]
Therefore, the mass of the pipe is 3619.1 grams (nearest tenth).
Note: I have used the exact value of π (not a rounded value).
x^5/x^2 can be simplified to what
Answer:
x^3
Step-by-step explanation:
Because they are the same base in a division question, you subtract the exponents.
5-2=3.
Answer = x^3
Hope this helps!
Btw, if this is right, please give me brainliest, thanks!
Answer:
x^3
Cancel the common factor of x^5 and x^2.
Hope you have a wonderful day :)
help help help help help
Answer:
1 4/10
Step-by-step explanation:
3 1/2 turns into 3 5/10 minus 4 9/10 blah blah blah anyways yeah
True or False
1. 28<0
2. 126<0
3. 688<0
Answer:
1. False, 2. False, 3. False
Step-by-step explanation:
ken makes trail mix. the ratio of nuts to raisins is 3 to 5 . find the amount of nuts used in a trail mix that had ten cups of raisins
answer: 3 to 5 = 6 to 10 = 9 to 15
so the answer would be 6 raisins
Answer:
3x+4x=10x=10/7=1.42
Step-by-step explanation:
3x+4x=10x
7x=10x
10/7=
1.42
Factor x^2 -2x -2. Show all steps
Answer:
x = 1 ± √3
Step-by-step explanation:
Factorizing using quadratic formula:x² - 2x - 2
Co-efficient of x² = a = 1
Co-efficient of x = b = -2
Constant = c = -2
D = b² - 4ac
= (-2)² - 4 *1*(-2)
= 4 + 8
= 12
[tex]\sf x = \dfrac{-b \ \± \sqrt{D}}{2a}[/tex]
[tex]\sf = \dfrac{2 \ \± \sqrt{12}}{2*1}\\\\\\=\dfrac{2 \± \sqrt{2*2*3}}{2}\\\\\\= \dfrac{2 \±2\sqrt{3}}{2}\\\\\\= \dfrac{2}{2} \± \dfrac{2\sqrt{3}}{2}\\\\\\= 1 \± \sqrt{3}[/tex]
[tex]\sf x = 1 + \sqrt{3} ; \ ; or \ x = 1 - \sqrt{3}[/tex]
The graph models the linear relationship between the distance traveled and the amount of time it took to get there. What is the rate of change of the distance traveled with respect to time?
A) 1/4
B) 4
C) 1/5
D) 5
Answer:
D) 5
Step-by-step explanation:
we see that every 4 hours 20 miles are traveled.
so, the rate of change of miles travels over hours is
20/4 = 5/1 = 5
in other words, the speed was 5 mph.
What is the remainder of (x3+5x2−32x−7)÷(x−4) ? Enter your answer in the box.
Show all work please!
The remainder of the given division ( x³+5x²−32x−7 ) ÷ ( x−4 ) is equal to 9.
As given in the question,
Dividend of the given division is equal to : ( x³+5x²−32x−7 )
Divisor of the given division is equal to : ( x−4 )
Divide the given dividend ( x³+5x²−32x−7 ) by divisor ( x−4 ) remainder we get,
( x³+5x²−32x−7 )
= x³ -4x² +9x² -36x +4x-16 +9
= x²(x-4) + 9x (x-4) +4(x-4) + 9
= (x-4)(x² +9x +4) + 9
Quotient is equal to (x² +9x +4)
Remainder is equal to 9
Therefore, the remainder of the given division ( x³+5x²−32x−7 ) ÷ ( x−4 ) is equal to 9.
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i need this answer cause I have no clue what I'm supposed to do
The missing co-ordinate r = 8
(6,9) and (r,-1) are two points on a line whose slope is given as -5.
Slope of a line is the change of y co-ordinates divided by the change in x co-ordinates between two points on a line.
Take (x₁, y₁) = (6,9) and (x₂, y₂) = (r, -1).
The slope of a line is given by,
Slope, m = (y₂-y₁)/ (x₂-x₁)
⇒ -5 = (-1-9)/(r-6)
⇒ -5 = -10/(r-6)
⇒ 1 = 2/(r-6)
⇒ r-6 = 2
⇒ r = 2+6
⇒ r = 8
So the points are (6,9) and (8,-1).
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Which of the following whole numbers are perfect squares? (Please select ALL correct answers for full credit).
Answer: 9, 144, 225, 10,000
Step-by-step explanation:
9=3x3
144=12x12
225=15x15
10,000=100x100
what does p equal [tex]\frac{p}{4} - -15 = 19[/tex]
The value of p from the given equation is 136.
The given equation is p/4 - 15 = 19.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
The given equation is solved as follows:
Transpose -15 to other side of the given equation
That is, p/4 = 19+15
⇒ p/4 = 34
Cross multiply 4 to 34
We get p = 34 × 4
⇒ p = 136
Therefore, the value of p from the given equation is 136.
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help
D’Neese said that 1/10^5 is equivalent to 10^5 . Which statement is true about what D’Neese said?
D’Neese is correct because a^-n =1/a^n
D’Neese is correct because a^-n = 1//a^-n
D’Neese is incorrect because a^-n = -1/a^n
D’Neese is incorrect because a^-n = a/-n
The statement that is true about what D’Neese said is (d) D’Neese is incorrect because a^-n = a/-n
What are expressions?Expressions are mathematical statements that are represented by variables, coefficients and operators
How to determine the true statement about the equation statement ?The equation statement is given as
1/10^5 is equivalent to 10^5
The above statement can be rewritten in another way
So, we have the following equation
1/10^5 = 10^5
As a general rule of indices, we have the following exponent rule
So, we have the following equation
1/a^n = a^-n
This means that the equation statement is false
This is so because
1/10^5 is not equivalent to 10^5, instead 1/10^5 is equivalent to 10^-5
Hence, the true option about the statement is (d)
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Margaret walks in 28 days if she walks for 30 minutes per day how long will she in 28 days?
Answer:
840 minutes or 14 hours
Step-by-step explanation:
30 min x 28 days = 840 min
:]
Answer: 14 Hours or 840 mins
30 × 28 = 840 mins = 14 hours
Is there anything like prodigy for high school students? i used to love laying prodigy but once I entered high school I couldn't because it wasn't in my level. so I would like to find something like prodigy for high school students or something where you can like walk around and do things instead of just doing boring flash cards for school.
Answer:
I don't think so, but maybe Prodigy has a game level for high schoolers. You could try searching Gooogle for it, but other than that, I don't think Prodigy does high school math games.
Step-by-step explanation:
Answer: So just ask them
Step-by-step explanation:
So like first tell your teachers and say "hey there mother clunker. Can we play prodigy?". and if they say "Nah fam we're in high school not trashy middle school or elementary school.". You say "SHUT YO PASTEY BUTT UP IM THE ALPHA MALE AND YOU SHOULD RESPECT ME. NOW TELL ME. CAN I PLAY PRODIGY?". If you do say that the teacher will always say "yes yes pls don't hurt me." then you get to play prodigy. Thank me.
Set both given equations equal to zero, then combine them into one standard form equation. Simplify if possible.
7x + 3 = 5 and y - 1 = 6
Equation 1 -
Equation 2 -
Combined Equation -
Answers:
a. 7x - 2 = 0
b. 7x - y = 1
c. 7x + 8 = 0
d. y - 7 = 0
e. 7x - y = -5
f. y + 7 = 0
The standard equation is 7x + y = 9
layoff Ax + By = C is the usual form for two-variable direct equations. A standard form direct equation is, for case, 2x + 3y = 5. When an equation is given in this format, chancing both intercepts is rather simple( x and y). When trying to break systems involving two direct equations, this form is also relatively helpful.
Given
7x + 3 = 5 and y - 1 = 6
Add the bottoms from the two given equations to produce a single standard-form equation.
By shifting the constant fromR.H.S. toL.H.S., the equations are reset to zero.
7x + 3 - 5 = 0
7x - 2 = 0----( 1)
y - 1 = 6
y - 1 - 6 = 0
y - 7 = 0-----( 2)
Equation 1 and equation 2 must be combined.
7x - 2 + y - 7 = 0
7x + y - 9 = 0
layoff Ax + By = C is the equation's conventional form.
A, B, and C are integers and x and y are variables in this type of equation.
Accordingly, the common equation is
7x + y - 9 = 0
7x + y = 9
therefore the standard equation is 7x + y = 9
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Please help!
Choose the mathematical sentence that most accurately expresses the
information in the problem, and would be most helpful in solving it.
After taking 4 pieces of fruit out of a bag, 12 pieces of fruit remained. How
many pieces of fruit were in the bag to start?
A. 12 + f = 4
B. 12 ÷ f = 4
C. 4+ f = 12
D. 12 - 4 = f
E. F ÷ 4 = 4
F. F - 4 = 12
Answer:
Option F
F - 4 = 12Step-by-step explanation:
According to given information
1) You had F fruits and took 4 pieces out of a bag, it is:
F - 42) Then you have 12 pieces of fruit remained:
F - 4 = 12This equation matches the answer choice F.
the distance between (2, -3) and (4, -3) on the coordinate plane?
[tex]=\sqrt{(x_{2} -x_{1})^{2}+(y_{2}-y_{1} )^{2} }\\ =\sqrt{(4-2)^{2}+(-3-(-3))^{2} } \\=\sqrt{(2)^{2}+(-3+3)^{2} } \\=\sqrt{4+0^{2} } \\=\sqrt{4} \\=2[/tex]
the distance is equal to 2
I also provided you with the formula for future use.
The measures of the angles of a triangle are shown in the figure below. Solve for x.
74°
(8x-19)°
45°
Answer:
x = 10
Step-by-step explanation:
The internal angles of a triangle sum 180°
74° + 45°+ (8x-19)° = 180°
119 + 8x - 19 = 180
119 - 19 + 8x = 180
100 + 8x = 180
8x = 180 - 100
8x = 80
x = 80/8
x = 10
Check:
74 + 45 + (8x-19) = 180
1100 + 8*10 = 180
100 + 80 = 180
I need help please !!!
Answer: can you guys help me too
Step-by-step explanation:
Together, Nora and Addison own 152 shares of stock. Nora has 4 less than three times Addison's amount. How many shares does each girl have?
Rewrite with Common Denominator
-⅗ + -7/10
By multiplying 2 on both the numerator and denominator of [tex]\frac{-3}{5}[/tex] .
The expression [tex]\frac{-3}{5}[/tex] + [tex]\frac{-7}{10}[/tex] with a common denominator can be written as
[tex]\frac{-6}{10}[/tex] + [tex]\frac{-7}{10}[/tex]
What is a fraction?A fraction is written with a numerator and a denominator where the numerator is less than the denominator.
Example: 1/3 is a fraction
We have,
[tex]\frac{-3}{5}[/tex] + [tex]\frac{-7}{10}[/tex]
We have different denominators and we need to make the denominator the same.
We will multiply 2 on both the numerator and denominator of [tex]\frac{-3}{5}[/tex].
= [tex]\frac{2 \times -3}{2 \times 5}[/tex]
= [tex]\frac{-6}{10}[/tex]
We see that,
The denominator in [tex]\frac{-6}{10}[/tex] and [tex]\frac{-7}{10}[/tex] is the same.
i.e 10.
Now,
[tex]\frac{-3}{5}[/tex] + [tex]\frac{-7}{10}[/tex] can be written as [tex]\frac{-6}{10}[/tex] + [tex]\frac{-7}{10}[/tex]
Thus,
By multiplying 2 on both the numerator and denominator of [tex]\frac{-3}{5}[/tex] .
The expression [tex]\frac{-3}{5}[/tex] + [tex]\frac{-7}{10}[/tex] with a common denominator can be written as
[tex]\frac{-6}{10}[/tex] + [tex]\frac{-7}{10}[/tex]
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can someone help with my homework? Thank you !
Answer:
1000-0=1/2(2000-0)
y= 1/2x
-1x + 2y = 0
guys please help ive been trying to figure it out for like an hour. i need to khow whats the value of x khowing that the perimeter is 51 cm
Answer:
x=4
Step-by-step explanation:
first, you have to add all of the sides up:
x+2x+x+3x+7+5x-4=12x+7-4=12x+3
12x+3=51. now, we can subtract 3 from both sides, so that we can isolate x.
-3 -3
12x=48
x=4