Question 148079
1. Find the inverse of the function f(x)=8x+16
Interchange x and y to get:
x = 8y + 16
Solve for y
y = (-1/*)x - 2
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2. Write y=x^5 in log form 
log(base x) y = 5
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3. Write log 7 49=2 in exponential form 
7^2 = 49
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4. use the change-of-base formula (log,r=log r/log a
b b to solve for x: x=log3 90 
x = [log 90]/[log 3]
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5. Solve for x: 9/(4x)+1/3=5/(2x)
Multiply thru by 12x to get:
27 + 4x = 30
4x = 3
x = 3/4
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6. Solve the system of linear equations: 2x+3y=-5 and y=2x+9 
Substitute to solve for "x":
2x + 3(2x+9) =9
8x + 27 = 9
8x = -28
x = -19/4
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Substitute into y = 2x+9 to solve for "y":
y = 2(-19/4)+9
y = -39/4 + 36/4
y = -3/4
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Cheers,
Stan H.