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3 years ago

I'm just confused on all of it

Mathematics

1 answer:

balandron [24]3 years ago

4 0

Let's solve for x.3x+4y=36Step 1: Add -4y to both sides.3x+4y+−4y=36+−4y3x=−4y+36Step 2: Divide both sides by 3.3x3=−4y+363x=−43y+12Answer:x=−43y+12

i got dis

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If y = 2x 3, find the value of y when x=-3

Ivenika [448]

Y = 2x³, when x = -3

y = 2*(-3)³

y = 2*-27

y = -54

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4 years ago

Lines j and k are parallel how to solve

Ede4ka [16]

I can't answer your question without a picture... Sorry.

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3 years ago

there are 640 students in one school. How many boys are there if it is known that 1/4 of the number of girls is equal to one six

Anna007 [38]

Answer:

960

Step-by-step explanation:

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7 0

3 years ago

Read 2 more answers

Find the area of this trapezoid. Include the correct unit in your answer.

NemiM [27]

Answer:

$\displaystyle A _{ \text{trapezoid}} = 70 {m}^{2}$

Step-by-step explanation:

we are given a trapezoid

we want to figure out the area

remember that,

$\displaystyle A _{ \text{trapezoid}} = \frac{a + b}{2} h$

where a and b represent the parallel lines and h represents the height

we get from the pic that a and b are 5 and 15 respectively and h is 7

so substitute:

$\displaystyle A _{ \text{trapezoid}} = \frac{5 + 15}{2} \times 7$

simplify addition:

$\displaystyle A _{ \text{trapezoid}} = \frac{20}{2} \times 7$

simplify division:

$\displaystyle A _{ \text{trapezoid}} = 10\times 7$

simplify multiplication:

$\displaystyle A _{ \text{trapezoid}} = 70$

since we multiply two same units we of course have to use square unit

hence,

$\displaystyle A _{ \text{trapezoid}} = 70 {m}^{2}$

4 0

3 years ago

Here's another, Thanks. (3/5)

Pachacha [2.7K]

You are correct. The scale factor is 1/5 = 0.2

Nice work.

7 0

3 years ago