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lbvjy [14]
3 years ago
12

Please help ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing.

Mathematics
1 answer:
ElenaW [278]3 years ago
3 0

Answer:

x =  -2 ±sqrt(7)

Step-by-step explanation:

3x^2 +12 x = 9

Divide each side by 3

3x^2 /3 +12x/3 = 9/3

x^2 +4x = 3

Take the coefficient of x

4

Divide by 2

4/2 =2

Square it

2^2 =4

Add it to each side

x^2 +4x+4 = 3+4

x^2 +4x+4 = 7

(x+2)^2 = 7

Take the square root of each side

x+2 = ±sqrt(7)

Subtract 2 from each side

x+2-2 = -2 ±sqrt(7)

x =  -2 ±sqrt(7)

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A candle maker has 4 1/2 pounds of clear wax. He wants to cut the wax into pieces that are 2/3 pound each. How many 2/3 pound pi
prisoha [69]

Answer:

a)  10  pieces of  2/3 pound  can be made.

b) 0.54 pounds of wax is left over.

Step-by-step explanation:

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To find the number of pieces that can be made out of 4.5 pounds of wax,

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Left over amount of wax  = Total weight -  Weights of the pieces made

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8 0
3 years ago
Which equation represents the line that passes through the points (–3, 7) and (9, –1)?
galben [10]

Answer:

Step-by-step explanation:

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now we sub

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y = mx + b

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use either of ur points...I will use (-3,7)...x = -3 and y = 7

now we sub and find b, the y intercept

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7 = 2 + b

7 - 2 = b

5 = b

so ur equation is : y = -2/3x + 5 <===

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Answer:

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Step-by-step explanation:

Subsitute the given vaule into the function and evaluate.

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