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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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What expression is equivalent to 7sqrtx^2/5sqrty^3

V125BC [204]

Answer:

Step-by-step explanation:

Sounds as tho' possible answer choices were listed. Please, share them without being asked to do so. Thank you.

7√(x²) 7√(x²)

------------- = ----------------------

5 √(y³) 5√( y^(3/2) )

We want to get the fractional exponent out of the denominator. To do this, multiply both numerator and denominator by y^(1/2):

7√(x²) 7√(x²) y^(1/2) 7√(x²)·y^(1/2) 7x√y

------------- = --------------------- * ----------- = --------------------- = ----------

5 √(y³) 5√( y^(3/2) ) y^(1/2) 5 √(y²) 5y

This is the final answer. We have succeeded in removing radicals / fractional exponents from the denominator.

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3 years ago

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What is the value of a in the equation 3.5a-2= -1.5a+4

Natali5045456 [20]

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3 years ago

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Naily [24]

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2 years ago

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A grocery store paid $314.65 for 7 crates of milk . This can be expressed by the equation Y=KX. How much would they have paid fo

Bingel [31]

ANSWER: 134.85

3.14.65=7(44.95)

Y=314.65

K=7

X=44.95

314.65 divided by 7 is 44.95 so that means 1 crate costs 44.95 so 44.95 * 3 = 134.85 which is your answer and how much it would cost for 3 crates

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