To reach $3,900 with an interest rate of four percent on an account originally containing $1,100, it would take 32.27 years.
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Answer: 118
Explanation:
SA = (2*7*5)+(2*7*2)+(2*2*5)
= 70+28+20
SA = 118
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Answer:
A) 1.5
B) x^2-23x+42 = (x-2)(x-21)
C) x=2, x=21
Step-by-step explanation:
a) 15 -2x / 3 = 4
15-2x = 12 (Times by three on both sides)
-2x = -3
x = -3/-2 = 3/2 = 1.5
b) x^2-23x+42
x^2-23x+42 = (x-2)(x-21)
c) x^2 -23x +42 = 0
x=2, x=21
(x-2) = 0 ⇒ x = 2
(x-21) = 0 ⇒ x = 21
25 can be added to form a perfect square trinomial