Answer: a=5+√5
b=5-√5
Step-by-step explanation:
a=?
b=?
P=20
A=20
P=a*b=20
A=a+b=20
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ab=20
a+b=10
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a=10-b
(10-b)b=20
-b²+10b-20=0
b=-10±√100-80/-2
b=-10±√20/-2
b=-10±2√5/-2
b=-10-2√5/-2=5+√55
b=5-√5
a+b=10
a+5-√5=10
a=5+√5
a+5+√5=10
a=5-√5
Answer:
18684 I believe
Step-by-step explanation:
Answer:
A. 13; D. 29; F. 37
Step-by-step explanation:
Add 3 to each of the given numbers, then select the result that is divisible by 8.
The sums are 16, 22, 27, 32, 38, 40
Of those numbers, the ones divisible by 8 are 16, 32, 40. These correspond to choices A, D, F.
