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3 years ago

Please solve by factoring 5x^2+7x-66=0...use a comma to seperate answers.

1 answer:

7 0

$5x^2+7x-66=0 \\ \\5x^2+7x -22x+ 22x-66=0 \\ \\ 5x^2-15x+ 22x-66=0 \\ \\5x(x-3)+22(x-3)=0 \\ \\ (x-3)(5x+22)=0\\ \\x-3 = 0 \ \ or \ \ 5x+22 =0 \\ \\ x=3 \ \ or \ \ 5x=-22 \ \ /:5 \\ \\x=3 \ \ or \ \ x=-\frac{22}{5} \\ \\x=3 \ \ or \ \ x=-4\frac{2}{5}$

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Fredo has a coupon for $1.00 off the price of a loaf of bread at the grocery store.After he arrived at the store,he found out th

Pani-rosa [81]

Answer:

$3 discount

Step-by-step explanation:

If Fredo originally had the markdown as $0 (meaning no change), then he arrived at the store, seeing the markdown was $2, the current markdown is $2.

Now that he has an extra $1 off, he gets 2+1 = $3 off the bread.

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3 years ago

Convert into slope intercept form?

Alexeev081 [22]

<h3>Answer:</h3>

y = 2x + 5

<h3>Step-by-step explanation:</h3>

Definitions:

Slope Intercept form; y = mx + b

m = slope

b = y intercept

Step 1: Since the slope is given plug it into y = mx

y = 2x + b

Step 2: Plug a points' x and y into their corresponding spots to solve for b

(33) = 2(14) + b

Simplify and solve

33 = 28 + b

-28 -28

5 = b

Plug both your slope in and your y intercept into y = mx + b

y = 2x + 5

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3 years ago

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liraira [26]

Answer:

b. $25

Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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3 years ago

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