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3 years ago

5 The table shows the relationship between the time a student spends typing each week

Mathematics

1 answer:

MakcuM [25]3 years ago

3 0

Answer:

tiuytrewqwwwwwwwwwwwwwwwwwwwwwwwwwwww

Step-by-step explanation:wwww222323333333233333

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3x-8= 4

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I think the answer is D but i could be wrong

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2 years ago

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How do you rewrite expressions using a positive exponent when the exponent originally attached is negative/fraction?

aleksley [76]

Answer:

Step-by-step explanation:

Take the negative exponent in the denominator to make it positive

Example = (2^-3)

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3 years ago

Select the correct answer. A six-sided fair die and an eight-sided fair die are rolled together. What is the probability of gett

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Step-by-step explanation:

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2 years ago

What is the sum of (1.3 × 10-7) and (-3.8 × 10-3)?

SVETLANKA909090 [29]

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3 years ago

skelet666 [1.2K]

Answer:

option D. 126 cm

Step-by-step explanation:

step 1

Find the scale factor

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

In this problem

Triangles PQR and XYZ are similar by AA Similarity Theorem

$\frac{XY}{PQ}=\frac{YZ}{QR}=\frac{XZ}{PR}$

Let

z ---> the scale factor

$z=\frac{XY}{PQ}$

substitute the given values

$z=\frac{30}{5}=6$

step 2

Find the perimeter of triangle XYZ

we know that

If two figures are similar, then the ratio of its perimeters is equal to the scale factor

Let

z ----> the scale factor

p_1 ----> the perimeter of triangle XYZ

p_2 ---> the perimeter of triangle PQR

$z=\frac{p_1}{p_2}$

The perimeter of triangle PQR is

$p_2=5+10+6=21\ cm$

we have

$z=6\\p_2=21\ cm$

substitute

$6=\frac{p_1}{21}$

$p_1=6(21)=126\ cm$

therefore

The perimeter of triangle XYZ is 126 cm

5 0

3 years ago