1. Harold bought a total of 40 items at an online store. He purchased ebooks for $7.50 each and mp3s for $0.90 each. If he spent a total of
$181.20 at the online store, how many ebooks did he purchase and how
many mp3s did he purchase?

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.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

a

step-by-step explanation:

strong negative correlation