Select all the correct systems of equations.
Which systems of equations have no solution?
x + 4y = 23
-3x = 12y + 1
2x + 4y = 22
-x = 2y - 11
2x + y = 15
x = 15-2y
2x + y = 17
-4x = 2y-34
3y = 10-x
2x+6y=7
y = 13 - 2x
4x - y = -1

The domain (input values) of the cosine function is all negative and positive angle measures.

Let the function be f(x) = cos(x)

The domain of cos(x) is -∞ < x < ∞

The range is -1 ≤ f(x) ≤ 1

Hence, domain of cos(x) is all (+) and (-) angle measures.

Same goes with sine function as well

For function f(x) = sin(x)

The domain is -∞ < x < ∞ and range -1 ≤ f(x) ≤ 1

However for f(x) = tan(x) the same is not applicable.

Answer:

A.  all negative and positive angle measures.

Step-by-step explanation:

The domain of a function is the set of input values (x-values).

The cosine function is a continuous function, and therefore has no restrictions throughout its domain.

Therefore, its domain is all real numbers.

Set notation:  { x | x ∈ R }

Interval notation: (-∞, ∞)

Answer:

18 and 6

Step-by-step explanation:

18+6=24

18/6=3

please mark brainliest

Answer: 3

8x+10=34

sub 10

8x=24 divide by 8

x=3

Step-by-step explanation:

If you want the answer simplified, its
-36x + 32

Answer:

k = -10

Explanation:

f(x) = 4x³ - 3kx² + 44x - 30

The divisor is:

Set divisor to zero:

Insert this into equation.

⇒ 4(2)³ - 3k(2)² + 44(2) - 30 = 210

⇒ 32 - 12k + 88 - 30 = 210

⇒ -12k + 90 = 210

⇒ -12k = 210 - 90

⇒ -12k = 120

⇒ k = 120/-12

⇒ k = -10

Answer:

k = -10

Step-by-step explanation:

From the remainder theorem, we know that the remainder, 210, is equal to f(2).

∵ [tex]f(2) = 210[/tex] ,

⇒  [tex]4(2)^3 - 3 k(2)^2+44(2) - 30 = 210[/tex]

⇒  [tex]32 -12k + 88 - 30 = 210[/tex]

⇒  [tex]90 - 12k = 210[/tex]

⇒  [tex]-12k = 120[/tex]

⇒  [tex]k = -10[/tex]

Quadrilaterals are plane shapes with four sides. Thus, the required answers are:

a) The first shape is a right trapezoid.

b) The second shape is a parallelogram.

The given properties are that of a quadrilateral, thus both shape is a quadrilateral. A quadrilateral is a family of shapes that have four straight sides. Examples include squares, rhombus, kites, etc.

A. Given that the shape has one right angle and parallel sides. Then considering the given properties, the most likely shape is a right trapezoid.

A right trapezoid is a type of trapezium that has one right angle, and a pair of parallel sides. Thus the shape here is a right trapezoid.

Other shapes could be ruled out by comparing their properties with the properties of the shape given in the question.

B. The properties of the required shape as given are: it has two pairs of congruent opposite sides, and 2 pairs of opposite parallel sides. Thus the most likely shape required here is a parallelogram. A parallelogram is a shape with parallel and congruent opposite sides, and no right angle.

Other shapes could be ruled out by comparing their properties with the properties of the shape given in the question.

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Kindly contact a 1-on-1 tutor if more explanations are required.

Answer:

[tex]f(x)=x^2[/tex]

Step-by-step explanation:

The quadratic parent function, has no transformations, and has the vertex at (0, 0). Which is the function: [tex]f(x)=x^2[/tex]. Any other quadratic function, has some form of transformation, whether it be a reflection, translation, compression/stretch, etc...

Answer:

B=3

Solution in photo

I hope this helped :)

Answer: [tex]h'(t)=4t^3 + 6t-1[/tex]

Step-by-step explanation:

Use the power rule for differentiation.

The confidence interval is (-1.1059, 7.70459).

Image result for what is confidence interval

A confidence interval is the mean of your estimate plus and minus the variation in that estimate.

The sample mean is M=3.3

The sample size is N=44

So, σM= s/√N = 16.6/ √44

= 16.6/ 6.633

= 2.621

and, the degree of freedom

df= n-1

=44-1

=43

So, The t-value for a 90% confidence interval and 43 degrees of freedom is t=1.681.

Now, Margin of error = 2.261* 1.681 = 4.4059

Now, the lower and upper bound of the confidence interval are:

LL = 3.3- 4.40459 = -1.1059

UL = 3.3+ 4.40459 = 7.70459

Hence, the confidence interval is  (-1.1059, 7.70459).

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Answer:

Step-by-step explanation:

Question

64^m

--------

4^2m

Solution

(64)^m = (4^3)^m = 4^3m

4^3m/4^2m = 4^(3m - 2m) = 4^m

Answer

2^2m = (2^2)^m = 4^m                     Equivalent

16^0.5m = (16^0.4) ^m = 4^m          Equivalent

4^m                                                    Equivalent

All three of these are equivalent. The catch is in splitting the powers apart.  In this top one (2^2m) you move the brackets so that the right bracket is after the two which gives (2^2)^m =  4m

You do the same thing with (16^0.5)^m.  16^0.5 = 4 So the answer is 4^m

The last one is 4^m which is the answer you got from the division.

Given expression: [tex]64^{m} /{4^{2m} }[/tex]

We can rewrite the expression (in the numerator and the denominator) as the product of multiple fours. Then, we can apply the exponent rule to simplify the expression to its simplest form. The simplest form will be the required simplified expression (solution to the provided expression).

We can apply the following exponent rule to simplify the expression:

[tex]\boxed{\text{Exponent rule:} \ 4^{m} /4^{n} = 4^{m - n}}[/tex]

The exponent rule states that the "base" must be the same when subtracting exponents. If we divide a term with same bases, we can reduce work time by subtracting the exponent to simplify the expression.

Now, let us look at all the options to verify which term matches our simplified term, and which expressions do not match our simplified term.

Given term: [tex]2^{2m} \\[/tex]

Can be re-written as:

Simplifying the expression inside the long brackets:

Therefore, the first option is equivalent to our simplified term.

Given term: [tex]16^{0.5m}[/tex]

Can be re-written as:

Exponent Rule: (xᵃ)ᵇ = xᵃᵇ

Therefore, the second option is equivalent to our simplified term.

Given term: [tex]4^{m}[/tex]

This term already matches our simplified term.

Therefore, the third option is equivalent to our simplified term.

We can conclude that all the options provided are equivalent to the given expression. We proved it by applying exponent rules and formulas.

We can see that the unit rate of y = 6.5*x is larger than the unit rate on the graph.

The unit rate is the equal to the slope of the line.

In the written line, y = 6.5*x, the unit rate is 6.5

On the graphed line we can see that it passes through the points (0, 0) and (1, 3), so the unit rate is:

[tex]r = \frac{3 - 0}{1 - 0} = 3[/tex]

Then we can see that the unit rate of y = 6.5*x is larger than the unit rate on the graph.

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Answer:

x=40

Step-by-step explanation:

total sum of angle in a triangle =180

180-100=80

x+x =2x

x= 80/2

x=40

The perimeter of the park is 3x^2 + 37x - 4

The side lengths of the triangular park are:

10x + 3x^2 - 8, 12x and 15x + 4

Add these sides to determine the perimeter

P = 10x + 3x^2 - 8 + 12x + 15x + 4

Collect the like terms

P = 3x^2 + 10x + 12x + 15x - 8 + 4

Evaluate the sum

P = 3x^2 + 37x - 4

Hence, the perimeter of the park is 3x^2 + 37x - 4

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Answer:

Remainder is 13

Step-by-step explanation:

You can apply the remainder theorem here. You just equate the divisor to 0, then substitute the x-value in the expression.

[tex]x^3 + 4x^2 - 2x + 1 \\[/tex]       then, [tex]x+2=0\\x=-2[/tex]

substitute:

[tex]-2^3 + 4(-2)^2-2(-2) + 1 =13[/tex]

Therefore, the remainder is 13

Answer:

59°

Step-by-step explanation:

ABC and ADF are congruent (that is the meaning of that symbol).

that means all their associated angles and side lengths are the same.

it is relatively clear to see that

A corresponds to A.

D corresponds to B.

F corresponds to C.

therefore, the angle D = angle B = 59°.

FYI - it also means that AD = AB = 16. but this information was actually irrelevant for this question.

Answer:

I think it would be D the last answer on the page I am pretty confident in the answer but if for some reason it's wrong then I'm sorry.

Step-by-step explanation:

The formula for the general term of the sequence is Tn = 4n - 2

The sequence is given as:

{2, 6, 10, 14, 18, . . . }

The above sequence is an arithmetic sequence with the following features:

The formula for the general term is calculated using:

Tn = a + (n - 1) * d

This gives

Tn= 2 + (n - 1) * 4

Expand

Tn = 2 + 4n - 4

Evaluate the like terms

Tn = 4n - 2

Hence, the formula for the general term of the sequence is Tn = 4n - 2

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Answer:

given

fx = 4x+1

gx= 2x+1

Step-by-step explanation:

fg x = ?

we know ,

f g x = (4x+1) ( 2x+1)

= 4x ( 2x+1) +1 (2x+1)

= 8x² +4x +2x+1

= 8x² + 6x +1

The value of x is ±0.7071 and x is an irrational number

The equation is given as:

[tex]4x^2 = 2[/tex]

Divide by 4

[tex]x^2 = 0.5[/tex]

Take the square roots

[tex]x = \pm 0.7071[/tex]

Hence, the value of x is ±0.7071

The equation is given as:

[tex]4^x = 5[/tex]

Take the logarithm of both sides

[tex]x\log(4) = \log(5)[/tex]

Divide both sides by log(4)

x = 1.16096....

The above number is a non-terminating decimal.

Non-terminating decimals cannot be represented as fractions of two integers

Hence, x is an irrational number

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Answer:

1 day

Step-by-step explanation:

since 7 spider =7 days

1 spider =? day

cross multiply

7 days × 1 spider = 7 spider × ? days

7 spider = 7 spider × ? days

7 spider 7 spider

= 1 days

[tex]\huge\boxed{\textsf{a.)}\ 10}[/tex]

Substitute [tex]\frac{1}{2}[/tex] for [tex]x[/tex].

[tex]f\left(\frac{1}{2}\right)=5\cdot4^\frac{1}{2}[/tex]

Use [tex]a^\frac{m}{n}=\sqrt[n]{a^m}[/tex].

[tex]\begin{aligned}f\left(\frac{1}{2}\right)&=5\cdot\sqrt[2]{4^1}\\&=5\cdot\sqrt[2]{4}\\&=5\cdot2\\&=\boxed{10}\end{aligned}[/tex]

Answer:

25.375

Step-by-step explanation:

17.50×45%=7.875

17.50+7.875=25.375 new price

Based on the data set given in the frequency table, the number of values that are less than or equal to 6 is 18.

The value that will be less than or equal to 6 are those that are valued at 6 or below.

The sum of these values are:

= 2 + 3 + 6 + 4 + 3

= 18

In conclusion, 18 values are less than or equal to 6.

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The number of 1’s among the draws will be 155.

Binomial distributions consist of n independent Bernoulli trials.

The expected value is given as

E(X) = np

465 draws will be made at random with replacement from the box [0 0 1].

The number of 1’s among the draws will be

p = 1/3

n = 465

Then the expected value is given as

E(x) = 465 × 1/3

E(x) = 155

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Using the hypergeometric distribution, it is found that there is a 0.1539 = 15.39% probability that all the four students like pizza.

The formula is:

[tex]P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}[/tex]

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

The parameters are:

For this problem, the values of the parameters are given as follows:

N = 15, n = 4, k = 10.

The probability that all the four students like pizza is P(X = 4), hence:

[tex]P(X = x) = h(x,N,n,k) = \frac{C_{k,x}C_{N-k,n-x}}{C_{N,n}}[/tex]

[tex]P(X = 4) = h(4,15,4,10) = \frac{C_{10,4}C_{5,0}}{C_{15,4}} = 0.1539[/tex]

0.1539 = 15.39% probability that all the four students like pizza.

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Answer:

-68.4

Step-by-step explanation:

answer explained on the photo !

Answer:

Geometric mean is most commonly represented as:

[tex]\sqrt{abc}[/tex]

Geometric mean formula is represented by [tex]\sqrt[n]{\sf x_1 \cdot x_2 \cdot x_3 \cdot ... x_n}[/tex] where n resembles term position and x₁, x₂, x₃ are numbers and they continue.

The formula for geometric mean of three numbers [n = 3]:

Solution: [tex]\sqrt[3]{\sf x_1 \cdot x_2 \cdot x_3 }[/tex]

Example's:

Geometric mean of 5 numbers [n = 5] : [tex]\sqrt[5]{\sf x_1 \cdot x_2 \cdot x_3 \cdot x_4 \cdot x_5 }[/tex]

Geometric mean of 2 numbers [n = 2] : [tex]\sqrt[2]{\sf x_1 \cdot x_2 }[/tex]

Answer:

89.25%

Step-by-step explanation:

65 is the lowest so it only counts for 20% of the grade

65*0.2=16.25

80*0.25=20

92*0.25=23

There is 30% left and 100% is the highest score

100*0.3=30

16.25+20+23+30=89.25

Answer:

86%

Step-by-step explanation:

From the information give:

Exam 1

Exam result = 65%

Overall grade weighting = 20%

⇒ Credit = 65% of 20% = 0.65 × 0.2 = 0.13 = 13%

Exam 2

Exam result = 80%

Overall grade weighting = 25%

⇒ Credit = 80% of 25% = 0.8 × 0.25 = 0.2 = 20%

Exam 3

Exam result = 92%

Overall grade weighting = 25%

⇒ Credit = 92% of 25% = 0.92 × 0.25 = 0.23 = 23%

Final Exam

The highest grade Brian can earn = 100%

Overall grade weighting = 100% - 20% - 25% - 25% = 30%

⇒ Credit = 100% of 30% = 1 × 30% = 30%

Highest potential class grade

Sum of each exam credit:

⇒ 13% + 20% + 23% + 30% = 86%

Therefore, the highest grade possible that Brian can earn in the class is 86%.