3 years ago

Use the distributive property to create an equivalent expression to 9x + 21.

Mathematics

1 answer:

vagabundo [1.1K]3 years ago

8 0

9x + 21 is the same as 3(3x +7)

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2 years ago

Given a monthly income of $1,500, how do you determine the yearly. salary this person will earn

Nina [5.8K]

Answer:

C: $1500 x 12

Step-by-step explanation:

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3 years ago

A right triangle is shown below. What is cos EFD?<br> Will make BRAINLIEST

rjkz [21]

Are you looking for the length from E to F?

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2 years ago

In triangle ABC , m angle A=(3x)^ , m angle B=(3x+10)^ , and m angle C=(4x-30)^ Find m m angle C

sweet-ann [11.9K]

Answer:

Step-by-step explanation:

Interior angles of a triangle = 180°

3x°+3x+10°+4x-30°=180°

10x°-20°=180°

10x°=180°+20°

10x°= 200°

10x°/10=200°/10

x°=20°

6 0

3 years ago

Given the polynomial 2x3 + 18x2 − 18x − 162, what is the value of the coefficient 'k' in the factored form?2x3 + 18x2 − 18x − 16

s344n2d4d5 [400]

Answer:

$k=3$

Step-by-step explanation:

Let

$f(x)=2x^3+18x^2-18x-162$

We factor 2 to obtain;

$f(x)=2(x^3+9x^2-9x-81)$

We factor the polynomial within the parenthesis by grouping.

$f(x)=2(x^2(x+9)-9(x+9)$

$f(x)=2(x^2-9)(x+9)$

$f(x)=2(x^2-3^2)(x+9)$

We apply difference of two squares on the second factor: $x^2-3^2=(x-3)(x+3)$

$f(x)=2(x+3)(x-3)(x+9)$

We now compare to;

$f(x)=2(x+k)(x-k)(x+9)$

It is now obvious that $k=3$

6 0

3 years ago