log base 4 of (2X) + log base 4 of (X+7)=2 Do I need to check for extraneous? Why doesn't the answer -8 work?

log base 4 of (2X) + log base 4 of (X+7)=2 Do I need to check for extraneous? Why doesn't the answer -8 work?

{m=4(n+3) {m=n-5

The annual interest rate paid for a $12000 simple interest loan was $240 less than the interest paid on a $25000 loan at 1.5% less interest per year. What was the total interest paid on the $25000...

4x=y-8 4x-y=8 a.the solution set is{} b. There are infini many solutions c.there is no solution

algebra question for my class that I am taking online.

A group of scientists studied the effect of a chemical on various strains of bacteria. Strain A started with 12000 cells and decreased at a constant rate of 4000 cells per hour after the chemical...

This is an equation used in a synthetic network generator 〈k〉 = ((2*π^(D/2)*δ*μ*I1) / Γ(D/2) ) * 〈κ〉^2 where 〈k〉 is the desired average degree of the...

math help

Help with this problem please.

{-4p+q=-5 {p-q=7

{-x+3y=7 {x-4y=-10

{4x+y=2 {y=x-3

Please help. This is on my review packet and I don't quite understand it.

Please help. This is on my review packet and I don't quite understand it.

A motorboat travels 135mi in 5 hours going upstream. It travels 195mi going downstream in the same amount of time. What is the rate of the boat in still water and what is...

A ship made a trip of 231 mi in 14 h. The ship traveled the first 98 mi at a constant rate before increasing its speed by 5 mph. It traveled another 133 mi at the increased speed. Find the rate of...

Solve the system using elimination. 2x – 2y = –8 x + 2y = –1

A cone that holds 350 cubic centimeters, what is the volume of the cone of the height is doubled?

Need help explaining how to do this, I am not understanding how exactly the transformation can be explained

-4(3n-2)-n=-11(n-1)

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