3 years ago

Is -17/-40 equal to -0.425? Show your work. plz help

1 answer:

8 0

Answer:

yes because if you simplify 17/40 to a decimal it will give you 0.425 and then add the negative signs and you get -0.425 so yes they are equal

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If ƒ(x ) = x 2 + 1 and g(x ) = 3x + 1, find ƒ(-1) + 5g(-3).<br><br> -40<br> -38<br> 7

EastWind [94]

$f(x) = x^2 + 1 \\ 
g(x) = 3x + 1$

You can do this in parts.
$f(-1) = (-1)^2 + 1 = 1 + 1 = 2$
g(-3) = 3(-3) + 1 = -9 + 1 = -8
So, 5g(-3) = 5(-8) = -40.
So f(-1) + 5g(-3) = 2 - 40 = -38

Or you can do this as one big chunk.
f(-1) + 5g(-3)
$=[(-1)^2+1] + 5[3(-3) + 1] \\
= (2) + 5(-9 + 1) \\
= 2 + 5(-8) \\
= 2 - 40 \\ = -38$