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3 years ago

Given f(x)=22x+12, find f(7)

Mathematics

2 answers:

krek1111 [17]3 years ago

8 0

166

Plug in 7 for x

I need more letters

Zarrin [17]3 years ago

4 0

Substitute x for 7.

f(x)=22x+12

f(7)=22(7)+12

Multiply first, then complete addition.

f(7)=154+12

f(7)=166

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What is the value of the expression 3² .(2³+4)/2²

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Answer:

Step-by-step explanation:

3^2(2^3+4)/2^2

3^2(8+4)/2^2

3^2(12)/2^2

9(12)/4

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2 years ago

Hi friends,

Fiesta28 [93]

d = b - 3 / 10

Step-by-step explanation:

b = 10d + 3

Place +3 in the other side of the equal sign
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Divide both sides by 10 to make d the subject
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2 years ago

Which graph has slope of 2

Vlad [161]

Answer:

Step-by-step explanation:

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2 years ago

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Guided Practice

wlad13 [49]

Answer: The Answer IS Either Letter B Or Letter C

an=100 · (12)n−1a subscript n baseline equals 100 times left parenthesis one half right parenthesis superscript n minus 1 baseline

Step-by-step explanation: I Think The Answer IS Letter B

Simplify the matrix.

a = 100 ,

a n = 12 a n − a ,

1 ,

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n , − h a l f ,

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...............................................................................................................................................

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3 years ago

Polygon ABCD is reflected and dilated to give polygon PQRS. The coordinates of the preimage are (2, 2), (6, 8), (12, 8), and (16

HACTEHA [7]

Answer: The scale factor of the dilation is 0.5.

Explanation:

It is given that ABCD is polygon which is reflected and dilated , then we get PQRS.

The vertices of ABCD are (2, 2), (6, 8), (12, 8), and (16, 2) respectively. The vertices of image PQRS are (11, 15),(9, 12), (6, 12), and (4, 15) respectively.

The reflection affects the coordinates but does not affect the length of the sides.

But when we talk about dilation it affects the length of sides according to the scale factor or a constant factor.

If a line segment AB is dilated by scale factor k then length of A'B' is k times length of AB.

$|A'B'|=k\times |AB|$ .... (1)

So we have to find any side length of preimage and the side length of that side in image. it means we have to find AB and PQ.

Use distance formula to find the side length.

$D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

$AB=\sqrt{(8-2)^2+(6-2)^2}=\sqrt{36+16}=2\sqrt{13}$

$PQ=\sqrt{(9-11)^2+(12-15)^2}=\sqrt{4+9}=\sqrt{13}$

It is noticed that the size of side in preimage is $2\sqrt{13}$ and the size of same side in image is $\sqrt{13}$ .

Using equation (1), we get

$\sqrt{13}=k \times 2\sqrt{13}$

$k=\frac{1}{2}$

$k=0.5$

Hence, the value of scale factor is 0.5.

7 0

3 years ago

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