Answer:
21
Step-by-step explanation:
Negative times negative is positive.
-3(-7) = 21
Answer:
10
Step-by-step explanation:
5x - 20 = 2x + 10
subtracted 2x on both sides
3x - 20 = 10
then add 20 to both sides
3x = 30
then divide 3 on both sides
x= 10
Answer:
C
Step-by-step explanation:
1/3 is 2/6
2/6 in 1/6 of an hour
multiply both numerators by 6:
12/6 in 6/6 of an hour
2 pages in 1 hour
0.6 = 6/10
0.7 = 7/10
7/9 = 0.77777
0.7 is between the two fractions.
If you need the fraction directly in the middle of the two it is
31/45.