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Elena-2011 [213]
2 years ago
14

Solve by canceling -5x+8y=-4 6x-8y=-12

Mathematics
1 answer:
Vinil7 [7]2 years ago
7 0

Step-by-step explanation:

-5x+8y=-4

6x-8y=-12   8y and 8x cancel out

         x=-16

To solve for y, substitute x=-16 back into the first equation

-5(-16)+8y=-4

    80+8y=-4

          8y=-84

            y=-10.5

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Answer:

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Step-by-step explanation:

tempuratures below zero are negative.

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Amelia claims that if she doubles the length and width of the base of a rectangular prism and triples the height, she has increa
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Step-by-step explanation:

(2L)(2W)(3H) = 12LWH.

Amelia gets it.

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3 years ago
In the diagram below of triangle MNO, P is the midpoint of MO and Q is the midpoint of NO. If PQ = 5x + 62, and MN = 6x-4, what
riadik2000 [5.3K]

Answer:

29

Step-by-step explanation:

There is a triangle embedded in triangle MNO, which is triangle PQO, and these are similar triangles in that their corresponding sides are always in the same ratio, which in this case is 2:1, as MP = MO due to the midpoint definition, and therefore MO is twice as long as MP. Same for NO and QO.

Now that we know the ratio, we can set 6x-4 = 2(-5x+64)

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8 0
3 years ago
Help please please please​
LekaFEV [45]

Answer:

There are 9 quarters and 3 nickels

Step-by-step explanation:

problems used: 0.5x+0.25y=3.09

x=y+6

so substitute what x is equal to into the problem

0.5(y+6)+0.25y=3.09  <--------- distribute

0.5y+3+0.25y=3.09     <--------- Combine like terms

0.3y+3=3.09 <----------- Subtract 3 on both sided to get y by itself

0.3y=0.9 <------------ Divide by 0.3 on both sides to get what y is equal to

y=3 <-------- now substitute to find what x is equal to

x=3+6

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8 0
3 years ago
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Dennis_Churaev [7]

Step-by-step explanation:

a^n=\underbrace{a\cdot a\cdot a\cdot...\cdot a}_{n}

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3 years ago
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