4 years ago

4x+3y=47.50 7x+1y=47.00 How do you do the substitution?

1 answer:

3 0

Well, the only thing you have to do is use like terms. As you can see, you have 4x and 7x. These two are like terms because they both have the same variable. Just like 3y and 1y.

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Which are solutions of the equation x2 - 16 = 0? Check all that apply.

maw [93]

X=8.
Let me explain.
2x-16=0
add 16 to both sides
2x=16
divide both sides by 2
x=8

4 0

3 years ago

A trapezoid has an altitude of 12 cm. Its parallel sides measure 10 and 8 cm, respectively. What is its area? 216 cm² 108 cm² 96

iren2701 [21]

Answer:

108 cm^2

Step-by-step explanation:

A trapezoid has an altitude of 12 cm. Its parallel sides measure 10 and 8 cm, respectively.

The base of trapezoid are 10 and 8 cm

Height of a trapezoid = 12cm

Area of a trapezoid formula = $\frac{a+b}{2} * height$

= $\frac{10+8}{2} * 12$

=108cm^2

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3 years ago

How do you find similar triangles (equation?)

Irina-Kira [14]

Two triangles are similar if they have:

<span>all their angles equalcorresponding sides are in the same ratio</span>

But we don't need to know all three sides and all three angles ...two or three out of the six is usually enough.

There are three ways to find if two triangles are similar: AA, SAS and SSS:

6 0

4 years ago

What is 340000000km in scientific notation

mixas84 [53]

Answer:

340000000km = km

${3.4} \times {10}^{8}$

5723000m

= 5.723 × 10⁶

0.00000031s

$3.1 \times {10}^{ - 7}$

8 0

2 years ago

Each car is traveling at a constant speed. Find the number of miles each car travels in 1 hour at the given rate. 22 miles in 1/

Dafna11 [192]

If the car has traveled 22 miles in a half an hour and stays at a constant rate of speed, the car will go 44 miles in 1 hour.

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3 years ago