Answer:
B. -80x + 28y - 56
D. 4(-20x + 7y - 14)
Step-by-step explanation:
8(-10x + 3.5y - 7)
= 8(-10x) + 8(3.5y) - 8(7)
= -80x + 28y - 56
= 4(-20x + 7y - 14)
Answer:
Step-by-step explanation:
you do this by swapping x and y values
so it becomes x = y/(y+7)
cross-multiply to get
x(y+7) = y
xy + 7x = y
xy - y = -7x
y(x-1) = -7x
y = -7x/(x-1)
y =
You would move the decimal back words twice so it would become (0.6)
<span>Combine the logarithms first: log5(4x+3)-log5(x-1). Since it's subtract, divide the two.
log5((4x+3)/(x-1))=2
Make both sides the exponent of five. 5^log5 cancels out.
5^(log5(4x+3/x-1))=5^2
4x+3/x-1=25
Multiply both sides by (x-1) to get rid of it under 4x+3.
(x-1)4x+3/x-1=25(x-1)
4x+3=25x-25
Now subtract 4x from both sides AND add 25 to both sides. This way you'll have all the x's by itself.
28=21x
Divide both sides by 21.
28/21=x
x=1.33333333333...
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