Mrs. Johnson went to the grocery store every week for five weeks. The table shows how much she spent each week. What is the average amount Mrs. Johnson spent per week?

$70

General Formulas and Concepts:

Pre-Algebra

Statistics

Step-by-step explanation:

Average amount during the 5 weeks can be calculated using mean.

Step 1: Define

Total amount: 47 + 96 + 78 + 61 + 68

Total weeks: 5

Step 2: Find Average

And we have our final answer!

$70/week average

Step-by-step explanation:

47+96+78+61+68= 350

350/5=70

To find the mean of a set of values, you add them all up and divide by the # of values.

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75

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.