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Dima020 [189]
3 years ago
5

8 - 5b = -7 ?? whats the b

Mathematics
2 answers:
Serggg [28]3 years ago
7 0
B=3
you subtract the 8 from the left then subtract it from the right giving you -5b=-15 then divide the -5 by both sides
hram777 [196]3 years ago
4 0

Answer:

b=3

Step-by-step explanation:

Isolate the b:

  • 8-5b=-7
  • Subtract 8, -5b=-15
  • Divide by -5, b=3

Check your answer:

  • 8-5(3)=-7
  • 8-15=-7
  • -7=-7
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Answer:

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Step-by-step explanation:

Given

f(x) = 2x - 6

Required

Match the transformations (See attachment)

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g(x) = f(x) - b

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b = 4

Substitute expression for f(x) and 4 for b in g(x) = f(x) - b

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g(x) = 2x - 10

<u>Stretching f(x) by 4 </u>

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In this case:

b = 4

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<u>Shift 4 units left</u>

Shifting a function to the left is represented as:

g(x) = f(x - b)

In this case:

b = 4

Substitute expression for f(x) and 4 for b in g(x) = f(x - b)

g(x) = f(x-4)

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f(x - 4) = 2(x - 4) - 6

f(x - 4) = 2x - 8 - 6

f(x - 4) = 2x - 14

Hence:

g(x) = 2x - 14

<u>Compress by 1/4 units </u>

This means that the function is stretched by 1/\frac{1}{4}

Compressing a function is represented as:

g(x) =f(bx)

In this case:

b = 1/\frac{1}{4}

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Substitute expression for f(x) and 4 for b in g(x) =f(bx)

g(x) =f(4x)

Calculating f(4x)

f(4x) = 2(4x) - 6

f(4x) = 8x - 6

Hence:

g(x)  = 8x - 6

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