For questions 5-6 the functions are
f(x)=5x^2+3
g(x)=x^2-7

see explanation

Step-by-step explanation:

Note that

(f + g)(x) = f(x) + g(x) and

(f - g)(x) = f(x) - g(x)

5

f(x) + g(x)

= 5x² + 3 + x² - 7 = 6x² - 4

6

f(x) - g(x) = 5x² + 3 - (x² - 7) ← distribute parenthesis

              = 5x² + 3 - x² +7 ← collect like terms

              = 4x² + 10

7

f(x) + g(x) = + 3x + 2x - 5 =   + 5x - 5

i dont know nkw

step-by-step explanation:

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0.6, 3/5, and 6% are the 3 same portion.

but, when they're all changed to a decimal they would equal to 0.6.

hope this , good luck!