Which expression is equivalent to (8^2)−4?
1 over 8 to the 2nd
negative 1 over 8 times 8 times 8 times 8 times 8 times 8 times 8 times 8
1 over 8 times 8 times 8 times 8 times 8 times 8 times 8 times 8
8^2

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.