Find the missing number in each data set, with the mean given.
(Work must be provided for the mean)

Mean = 7.8 | 5, 8, __, 12, 3
Mean = 12 | 9, 12, 15, 21, 4, __
Mean = 74.5% | 91%, 77%, 56%, __, 76%, 61%, 98%, 89%

answer: ouch. thats difficult

step-by-step explanation:

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

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.

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve