4. Lacy wants to buy a bag of
apples. One bag of apples weighs
3.15 pounds, and a second bag
weighs 3.4 pounds. Lacy thinks the
second bag of apples will cost less
because it weighs less. What mistake
could Lacy have made? What can she
do to correct it?

Lacy could have thought that .15 in greater than .4

She can add an zero after .4 to correct it.

Step-by-step explanation:

Given,

The weight of two bags of apples is 3.15 and 3.4 pounds.

The weight of second bag can also be written as 3.40 pounds

Therefore,

The bag of 3.40 pounds is greater in weight than a bag of 3.15 pounds of apples so it will cost more.

Lacy could have thought that .15 in greater than .4

She can add an zero after .4 to correct it.

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

both equations and proportions are better.