A=bh/2, h=b-5 so
A=(b/2)(b-5)
A=(b^2-5b)/2 and A=42 so:
(b^2-5b)/2=42
b^2-5b=84
b^2-5b-84=0
b^2-12b+7b-84=0
b(b-12)+7(b-12)=0
(b+7)(b-12)=0 and since b>0
b=12m
Only in d. are the number related by multiplication (Multiplied by 3 each time to get the next number in the sequence).
3 x 3 =9
9 x 3 =27
27 x 3 = 81 etc.
Answer:
$2,000 or 6.25%
Step-by-step explanation:
1000 x 2 = 2000
28000 + 2000 = 30000 Juan's salary after 2 years
500 x 2 = 1000
31000 + 1000 = 32000 Mariana's salary after 2 years
30000 - 32000 = 2000 difference in salary
2000/32000 x 100= 6.25 difference in salary in percentage