3 years ago

What is the coefficient of the variable in the expression 2 - 5x – 4 + 8?

Mathematics

1 answer:

Natalija [7]3 years ago

3 0

Answer:

-5

Step-by-step explanation:

The coefficient is the number attached to the variable.

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Find the perimeter of a parallelogram whose base is 8cm and another side is 12cm

lidiya [134]

A parallelogram

P=2(a+b)

The answer is 64

P=2(a+b)=2·(24+8)=64

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3 years ago

If f(x)=-2x^2+5x-3 and g(x) is the reflection of f(x) across the y-axis, then an equation of g is which of the following

Ymorist [56]

To reflect a function across the y-axis you have to change

$x\mapsto -x$

So, the function becomes

$f(x)=-2x^2+5x-3 \mapsto f(-x)=-2(-x)^2+5(-x)-3=-2x^2-5-3$

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3 years ago

Simplify: 22 + 6(3) – 7<br><br> Simplify: 5x − 2y + 3z − 2x − y + 4z

guapka [62]

Answer:

1. 33

2. 3x - 3y + 7z

Step-by-step explanation:

combine like terms on the second one.

3x - 3y + 7z

solve for the first one 22 + 18 - 7

18 - 7 = 11

11 + 22 = 33

3 0

3 years ago

Need help with number 6 plssssssssssassssa

Advocard [28]

C I think sorry I will try I will get other answers later

8 0

3 years ago

Find f(k - 1) when f(x) = 5x^2+ 4x – 5.

bekas [8.4K]

Plug in $k-1$ to each $x$ in the function.

$f(k-1)=5(k-1)^2+4(k-1)-5$

$f(k-1)=5(k^2-2k+1)+4k-4-5$

$f(k-1)=5k^2-10k+5+4k-4-5$

$f(k-1)=5k^2-6k-4$

Hope this helps.

頑張って!

5 0

3 years ago