15 + .65x = 80
15 + .65x = 80
15 - 15 + .65x = 80 - 15
.65/.65x = 65/.65
x = 100
Beth swam 100 laps.
34.
4 cups = 1 quart
4 quarts = 1 gallon
- 8 cups x 7 days = 56 cups
56 cups = 3.5 gallons
33.
16 ounces = 1 lb
Colleen started off with 70 ounces after she takes some off she has 56 so,
70 - 56 = 14(ounces she took off)
Answer:
A) 5 7/10 =7/2 = 3.5
B) 5 28/33 = 140/33 = 4.24...
this one is correct - C) 5 26/33 = 130/33 = 3.93...
D) 5 39/50 = 39/10 = 3.9
5.78 =5 71/90
5.78 =5 26/33
Substitute x = -4y into x+5y = 2.
-4y + 5y = 2
y = 2. Substitute this value into the first equation: x = -4 × 2 = -8.
So the answer is (-8,2).
