1) 8p+3f=$10.39
2) 5p+4f=$10.51
where p represents pencil & f represents folder.
multiply the first equation by 5 and the second equation by 8.
40p+15f=$51.95
40p+32f=$84.08
Subtract
17f=$32.13
f=$32.13/17 =$1.89
Answer:
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Step-by-step explanation:
Answer
(10x+15) + (5x)=180
X=11
Answer:
162
Step-by-step explanation:
the pattern in the denominators is ' multiply by 3 '
that is
2 × 3 = 6
6 × 3 = 18
18 × 3 = 54
then the next denominator is
54 × 3 = 162
Answer:
f-1(x) = (x-8)/2
Step-by-step explanation:
f(x) = 2x+ 8
y = 2x + 8
replacing y and x
x = 2y + 8
2y = x- 8
y =( x-8)/2
f-1 (x) =( x-8)/2