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3 years ago

Write the sum as a product. Simplify the product. (–9) + (–9) + (–9) + (–9)

1 answer:

3 0

The answers is -36 because you only have to add all the numbers (you only add a negative number when is the same sing y is not negative you don’t have to add you have to subtract the number) hope it helps

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Marco has a jug with 37 1/2 ounces of juice. He wants to use some small cups to pass out samples of the juice. Each cup can hold

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37 1/2 divided by 2 1/2=15

Marco can fill 15 cups with juice samples.

Check:
2 1/2x15=37 1/2

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3 years ago

If x=-2 and y=3 what is the value of 2x+y?

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Step-by-step explanation:

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3 years ago

Simplify the expression by using a double-angle formula. −2cos2π91

Hatshy [7]

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4 years ago

SOLVE USING THE QUADRATIC FORMULA 1) y=3x^2-x-6 2) y=-5x^2+7x+3

kondor19780726 [428]

1) $x=\frac{1+\sqrt{73}}{6}\,\,and\,\,x=\frac{1-\sqrt{73}}{6}$

2) $x=\frac{-7+\sqrt{109}}{-10}\,\,and\,\,x=\frac{-7-\sqrt{109}}{-10}$

Step-by-step explanation:

Solving the equations using quadratic formula.

1) $y=3x^2-x-6$

The quadratic formula is:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

where a =3, b = -1 and c= -6

Putting values:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(-1)\pm\sqrt{(-1)^2-4(3)(-6)}}{2(3)}\\x=\frac{1\pm\sqrt{1+72}}{6}\\x=\frac{1\pm\sqrt{73}}{6}\\so, x=\frac{1+\sqrt{73}}{6}\,\,and\,\,x=\frac{1-\sqrt{73}}{6}$

2) $y=-5x^2+7x+3$

The quadratic formula is:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

where a =-5, b = 7 and c= 3

Putting values:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(7)\pm\sqrt{(7)^2-4(-5)(3)}}{2(-5)}\\x=\frac{-7\pm\sqrt{49+60}}{-10}\\x=\frac{-7\pm\sqrt{109}}{-10}\\So, x=\frac{-7+\sqrt{109}}{-10}\,\,and\,\,x=\frac{-7-\sqrt{109}}{-10}$

Keywords: Solving Using Quadratic Formula

Learn more about Solving Using Quadratic Formula at:

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4 years ago