3 years ago

PLZ HELP!!!!!!!!! AAAAAAAAAAAA

Mathematics

2 answers:

Mkey [24]3 years ago

7 0

Answer: 20.4 40.4 2.5 32

Step-by-step explanation:

blagie [28]3 years ago

3 0

Answer:

15) 20.4

16) 40.4

17) 2.5

18) 32

Step-by-step explanation:

15) Use the calculator: 42.7/11.1*5.3

16) Use the calculator: 121.1/3

17) Use the calculator: 32.5/ (42.9/3.3)

18) 28.8/ (1.8/2)

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Given the following functions f(x) and g(x), solve (f + g)(5) and select the correct answer below: f(x)=2x^2-10 g(x)=x+9

steposvetlana [31]

Answer:

$\large\boxed{(f+g)(5)=54}$

Step-by-step explanation:

$f(x)=2x^2-10,\ g(x)=x+9\\\\(f+g)(x)=f(x)+g(x)\\\\\text{Substitute:}\\\\(f+g)(x)=(2x^2-10)+(x+9)=2x^2-10+x+9=2x^2+x+(-10+9)\\\\(f+g)(x)=2x^2+x-1\\\\(f+g)(x)(5)\to\text{put x = 5 to the equation of the function:}\\\\(f+g)(5)=2(5^2)+5-1=2(25)+5-1=50+5-1=54$