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icang [17]
3 years ago
9

100 POINT AND BRAINERLEST PROMISE

Mathematics
1 answer:
lys-0071 [83]3 years ago
6 0

Answer:

the weight of one bar is 12.75

Step-by-step explanation:

divide the total weight by the total number of bars

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Solve this equation for x: 2x^2 + 12x - 7 = 0
zhannawk [14.2K]

Answer:

x=0.5355 or x=-6.5355

First step is to: Isolate the constant term by adding 7 to both sides

Step-by-step explanation:

We want to solve this equation: 2x^2 + 12x - 7 = 0

On observation, the trinomial is not factorizable so we use the Completing the square method.

Step 1: Isolate the constant term by adding 7 to both sides

2x^2 + 12x - 7+7 = 0+7\\2x^2 + 12x=7

Step 2: Divide the equation all through by the coefficient of x^2 which is 2.

x^2 + 6x=\frac{7}{2}

Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

Coefficient of x=6

Divided by 2=3

Square of 3=3^2

Therefore, we have:

x^2 + 6x+3^2=\frac{7}{2}+3^2

Step 4: Write the Left Hand side in the form (x+k)^2

(x+3)^2=\frac{7}{2}+3^2\\(x+3)^2=12.5\\

Step 5: Take the square root of both sides and solve for x

x+3=\pm\sqrt{12.5}\\x=-3\pm \sqrt{12.5}\\x=-3+ \sqrt{12.5}, $ or $x= -3- \sqrt{12.5}\\$x=0.5355 or x=-6.5355

6 0
3 years ago
30 points. Please help!!
yarga [219]

Answer:

c

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
What is 6y - 12 = -3x in standard form?
lakkis [162]
To get it into standard you need to simplify
6y - 12 = -3x add 12 to both sides
6y = -3x + 12 add 3x to both sides
3x + 6y = 12
And that is in standard which is A + B = C
6 0
3 years ago
Please help me
iVinArrow [24]

Answer:

i think 4 th option

if u want to verify just substitute (4,-2)

8 0
3 years ago
A group of workers can plant at a rate of 12 acres per day.
Rashid [163]

Answer:

36

Step-by-step explanation: if they do 12 acres per day.. it would be 36 for three days. 12x3=36

4 0
3 years ago
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