Answer:
<span>a=15</span>
Explanation:
<span>5a−10b=45</span> , when <span>b=3</span>
Substitute the value of b into the equation.
<span>5a−10<span>(3)</span>=45</span>
Solve for a.
<span>5a−10<span>(3)</span>=45</span>
<span>5a−30=45</span>
<span>5a=75</span>
<span>a=<span>15</span></span>
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Answer:
$36.25
Step-by-step explanation:
Surface area: 2*l*w+2*w*h+2*h*l
2*2*2.5+2*2.5*0.5+2*0.5*2
10+2.5+2
14.5 sq. ft.
14.5*2.50=36.25
Heya !
Given expression -

Subtracting 25 both sides ,

Dividing by 3 on both sides ,

Therefore ,
Answer:
20
Step-by-step explanation:
8 * 5 = 40
40 * 10 = 400
√400 = 20