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astra-53 [7]
4 years ago
9

What is the value of a in the equation 3 a plus b equals 54 when b equals 9?

Mathematics
2 answers:
mars1129 [50]4 years ago
8 0

Answer:

a= 15

Step-by-step explanation:

Given

3a + b = 54 ← substitute b = 9

3a + 9 = 54 ( subtract 9 from both sides )

3a = 45 ( divide both sides by 3 )

a = 15

Tanzania [10]4 years ago
4 0

Answer:

3(15)+9=54

Step-by-step explanation:

A is equal to 15

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Lostsunrise [7]

Answer:

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Step-by-step explanation:

The equation for the area of a cylinder is A=2πrh+2πr^2

If we substitute the radius and height, the equation would be A=2π(60)(2.4)+2π(60)^2

π can be shortened to 3.14 so it's A=2(3.14)(60)(2.4)+2(3.14)(60)^2

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3 years ago
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puteri [66]

Answer:

a. 4

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Step-by-step explanation:

Take any number x;

Its opposite is -x

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Solving (a): -4

In this case:

x = -4

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In this case:

x = 8

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In this case:

x = -2

The opposite; -x is

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5 0
3 years ago
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Step-by-step explanation:

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