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3 years ago

Help this is due today and I don’t know how to do it you please show me the steps:)

Mathematics

1 answer:

DochEvi [55]3 years ago

7 0

Answer:

628 inches²

Step-by-step explanation:

the equation for surface area is SA=2(lw+lh+hw) so..

1. 2×(16×14 + 16×3 + 3×14)

2. 2×(224+48+42)

3. 2×314

4. 628

Hope this helps! :)

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Find the constant of proportionality k. Then write an equation for the relationship between x and y

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Question:

Find the constant of proportionality k. Then write an equation for the relationship between x and y

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Answer:

(a) $k = 5$

(b) $y = 5x$

Step-by-step explanation:

Given

$\begin{array}{ccccc}x & {2} & {4} & {6} & {8} \ \\ y & {10} & {20} & {30} & {40} \ \ \end{array}$

Solving (a): The constant of proportionality:

Pick any two corresponding x and y values

$(x_1,y_1) = (2,10)$

$(x_2,y_2) = (6,30)$

The constant of proportionality k is:

$k = \frac{y_2 - y_1}{x_2 - x_1}$

$k = \frac{30-10}{6-2}$

$k = \frac{20}{4}$

$k = 5$

Solving (b): The equation

In (a), we have:

$(x_1,y_1) = (2,10)$

k can also be expressed as:

$k = \frac{y- y_1}{x- x_1}$

Substitute values for x1, y1 and k

$5 = \frac{y- 10}{x- 2}$

Cross multiply:

$y - 10 = 5(x - 2)$

Open bracket

$y - 10 = 5x - 10$

Add 10 to both sides

$y - 10 +10= 5x - 10+10$

$y = 5x$

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3 years ago

Will mark as Brainliest.

strojnjashka [21]

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Answer:

The associative property is grouping

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