9. 3x + 9y = 18 y = x + 2 Substitution method
1 answer:
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Answer:
4/5
Step-by-step explanation:
the numerator of fraction is 1 less than its denominator. If the numerator is increased by 4 and the denominator is increased by 5, the new fraction becomes equivalent to 4/5. what is the original fraction?
Let n = numerator
d = denominator
n = d - 1
=
=
cross multiply
5(d + 3) = 4(d + 5)
5d + 15 = 4d + 20
d = 5
n = d - 1
5 - 1 = 4
original fraction 4/5
Answer:
D -9
Step-by-step explanation:
(g o f)(-1) = g(f(-1))
f(-1) =
g(-4) = -4 - 5 = -9
So, (g o f)(-1) = -9
<span><span>-5(2b+7) + b < -b - 11</span>
<span>-10b - 35 + b < -b - 11
- 10b + b - 35 < -b - 11
-9b - 35 < -b - 11
- 9b + b < - 11 + 35
-8b < 24
</span></span>
<span><span>
b < -3
Have a nice days.........</span></span>
<span>-10b - 35 + b < -b - 11
- 10b + b - 35 < -b - 11
-9b - 35 < -b - 11
- 9b + b < - 11 + 35
-8b < 24
</span></span>
<span><span>
b < -3
Have a nice days.........</span></span>