Answer:
the answer is 172
Step-by-step explanation:
Answer:
3 and 7
2 and 6
4 and 8
1 and 8
Step-by-step explanation:
Answer:
Multiplying a number by n is equivalent to dividing it by 1/n.
Step-by-step explanation:
We generalise for any whole number n.
Answer:
- 35 5-lb weights
- 25 3-lb weights
Step-by-step explanation:
Let t and f represent the numbers of three- and five-pound weights. The problem statement tells us ...
f + t = 60
f - t = 10
Adding these two equations, we get ...
(f +t) +(f -t) = (60) +(10)
2f = 70 . . . . . eliminate parentheses
f = 35 . . . . . . divide by 2
She has 35 5-lb weights, and 25 3-lb weights.
P=2(l + b)
P=2l + 2b
P-2b=2l
P-2b/2=l
C is your answer
