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3 years ago

-x-6y=10 x-2y=-2 using elimination?

Mathematics

2 answers:

Lana71 [14]3 years ago

4 0

Answer: x = -4, y = 1

AleksAgata [21]3 years ago

3 0

If we add the two equations we get:
-x - 6y + x - 2y = 10 + (-2)
-8y = 8, therefor y = -1

If y = -1:
-x - 6(-1) = 10
-x + 6 = 10
-x = 4
x = -4

Therefor the solution would be (-4, -1)

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2 years ago

28 in 21 in., 20 in.<br> Is this a right triangle?

ankoles [38]

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No, it is not a right triangle.

Step-by-step explanation:

The simplest way to determine is testing out the numbers with Pythagorian theorem.

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the longest side is the hypotenuse so side c (28 in) will be the hypotenuse.

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3 years ago

Choose the correct simplification of the expression (-9a^3b^2c^10)^0

Flauer [41]

Option C: 1 is the simplification of the expression $\left(-9 a^{3} b^{2} c^{10}\right)^{0}$

Explanation:

The given expression is $\left(-9 a^{3} b^{2} c^{10}\right)^{0}$

We need to simplify the given expression.

<u>Simplification:</u>

To simplify the given expression, let us apply the exponent rule, $a^{0}=1$ where $a \neq 0$

Thus, the the exponent rule $a^{0}=1$ means that any value (except zero) to the power of zero is equal to one.

Thus, the expression $\left(-9 a^{3} b^{2} c^{10}\right)^{0}$ becomes,

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