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erik [133]
3 years ago
12

2r+8-r=-7 Need help ASAP

Mathematics
2 answers:
Anvisha [2.4K]3 years ago
8 0

Answer:

r= (-15) is the answer to the question ok

Mumz [18]3 years ago
6 0

Answer:

2r + 8 - r = 7

r + 8 = 7

r = -1

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Sidana [21]
f(x)=x^2+2x+3
g(x)=\frac{x+4}{3}
f(g(x))=(\frac{x+4}{3})^2+2(\frac{x+4}{3})+3
f(g(x))=\frac{x^2+8x+16}{9}+\frac{2x+8}{3}+3
f(g(2))=\frac{2^2+8(2)+16}{9}+\frac{2(2)+8}{3}+3
f(g(2))+\frac{4+16+16}{9}+\frac{4+8}{3}+3
f(g(2))=\frac{36}{9}+\frac{12}{3}+3
f(g(2))=4+4+3
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Check:
g(2)=(2+4)/3=2
f(2)=2^2+2(2)+3=4+4+3=11  Checks. 
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