For this case we can make the following rule of three:
21 ------> 70%
x --------> 100%
Clearing x we have:
x = (100/70) * (21)
Rewriting we have:
x = (10/7) * (21)
x = 30
Thus,
21 is 70% of 30
Answer:
21 is 70% of 30
25% = 1/4
1/4(40)
Divide 40 by 4 to remove the 1/4
10
25% of 40 is 10.
Answer: it is C
Step-by-step explanation:
(X - 2)×(X + 5) = 0
X= 2 or -5
