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Aloiza [94]
3 years ago
7

I need help!!!! a b c or d

Mathematics
1 answer:
sleet_krkn [62]3 years ago
7 0

Answer:

-3

Step-by-step explanation:

it is right

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Use quadratic formula solve .7x^2 - 28x - 7​
beks73 [17]

Answer:

x = 2 + sqrt(5) or x = 2 - sqrt(5)

Step-by-step explanation using the quadratic formula:

Solve for x over the real numbers:

7 (x^2 - 4 x - 1) = 0

Divide both sides by 7:

x^2 - 4 x - 1 = 0

Add 1 to both sides:

x^2 - 4 x = 1

Add 4 to both sides:

x^2 - 4 x + 4 = 5

Write the left hand side as a square:

(x - 2)^2 = 5

Take the square root of both sides:

x - 2 = sqrt(5) or x - 2 = -sqrt(5)

Add 2 to both sides:

x = 2 + sqrt(5) or x - 2 = -sqrt(5)

Add 2 to both sides:

Answer:  x = 2 + sqrt(5) or x = 2 - sqrt(5)

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3 years ago
Which algebraic expression is equivalent to the expression below 6(2x+5)+4x
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3 years ago
The school cafeteria sells 300 half-pints Of milk everyday. How many gallons of milk is that?
Natali [406]
37.5 gallons of milk, you welcome.
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3 years ago
The graph of is shown on the grid.
Ronch [10]

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Step-by-step explanation:

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Mary needs to order pizza for 18 students. Each student should get 4/7 of a pizza. How many pizzas should Mary order? How much p
Llana [10]

Answer:

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3 years ago
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