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GrogVix [38]
3 years ago
15

If a = 4 and 5a(2b – 3a) = 40, what is the value of b?

Mathematics
1 answer:
mamaluj [8]3 years ago
7 0

Answer:

b=7

Step-by-step explanation:

5a(2b – 3a) = 40

Let a=4

5*4(2b-3*4) = 40

20(2b-12) = 40

Divide each side by 20

20/20 (2b-12) = 40/20

2b-12 =2

Add 12 to each side

2b-12+12 = 2+12

2b = 14

Divide by 2

2b/2 = 14/2

b = 7

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3 years ago
Old Farmer MacDonald wants to build a pen to keep his chickens in. He has 36 meters of fence and plans to make a rectangular pen
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Answer:

2 = 18

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6 = 6

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Step-by-step explanation:

You can solve this by dividing 36 (the whole amount of meter of fences)

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36 divided by 16 = 2.25 (2.3 simplified)

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