Only the third one makes x=-1 true
Answer:
14*2
Step-by-step explanation:
x=7 and Y=2
2×7*2
14*2
Answer: 25 hours
Step-by-step explanation:

8 screens
or

Replace;



Step-by-step explanation:
check it.. i have solved it for you.
Answer:
B. $136,960.54
Step-by-step explanation:
Rate = r = 4%
Times = b = 4
Future Value = A = $315,930
No. pf Years = n = 21
Present Value = P = ?
A = P [1 + (r / b)]ⁿᵇ
$315,930 = P [1 + (0.04 / 4]²¹ ˣ ⁴
$315,930 = P [1 + 0.01]⁸⁴
$315,930 = P [1.01]⁸⁴
$315,930 = P x 2.306723
P = $315,930 / 2.306723
P = $136,960.54