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3 years ago

14

Kendra is buying an outfit that is on sale for 20% off. The original price of the outfit is $109. What is the sale price? $130.8

0 $87.20 $78.20 $21.80

2 answers:

aliya0001 [1]3 years ago

7 0

$109 X 20%
$109 X 0.2=$21.8
$109-$21.8=$87.20

Ierofanga [76]3 years ago

5 0

Answer:

$87.20

Step-by-step explanation:

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Galina-37 [17]

Answer:

v= -1 (BRAINLIEST PLEASE)

Step-by-step explanation:

|v+8| -5=2

Add 5 to each side

|v+8| -5=2

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Now you have |v+8|= 7

So what plus 8 equals 7?

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2 years ago

Aidan rollerblades 540 ft per min. at this rate how far in yards will he rollerblade in 5 min( 1 yd =3 ft)

Pani-rosa [81]

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3 years ago

If x+a is a factor of 2x²+2ax+5x+10,find a.

vazorg [7]

If $x+a$ is a factor of the polynomial, it means that $-a$ is a root of the polynomial.

In fact, if a polynomial $p(x)$ has a root $x_0$ (i.e. $p(x_0)=0$ ), then the polynomial is divisible by $(x-x_0)$

In your case, you know that the polynomial is divisible by $(x+a)=(x-(-a))$ , so $-a$ is a solution.

Let's evaluate $p(-a)$ and set it to zero:

$2(-a)^2+2a(-a)+5(-a)+10 = 0 \iff 2a^2-2a^2-5a+10=0 \iff -5a+10 = 0 \iff a = 2$

We can check the answer: if $a=2$ the polynomial becomes

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And we're claiming that $-a=-2$ is a root of this polynomial:

$2(-2)^2+9(-2)+10 = 2\cdot 4 - 18 + 10 = 0$

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