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Genrish500 [490]
3 years ago
12

What is the solution to the following system of equations? -5x-4y=-4 25x+20y=20

Mathematics
1 answer:
Tju [1.3M]3 years ago
5 0
Simplify
2nd one divide both sides by 5
5x+4y=4
hmm, seems familliar
times it by -1
-5x-4y=-4
same as other one

they are the same line
therefor the solution set is all the points on the line -5x-4y=-4 or y=(-5/4)x+1


solution set is alll points on y=(-5/4)x+1 or 5x+4y=4
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Answer:

1 ) y = 2x - 1

slope = 2

y intercept is (0,-1)

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Step-by-step explanation:

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3 years ago
Set up a System of Equations and Solve
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Answer:

The cost of each ice cream cone is $4.50

The cost of each ice cream basket is $3.75

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Step-by-step explanation:

Let

x-----> the cost of the ice cream cone

y----> the cost of the ice cream basket

z---> the cost of the donut

we know that

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x+2z=7.50 ------> z=(7.50-x)/2 -----> equation B

x+y+z=9.75 ----> equation C

substitute equation A and equation B in equation C and solve for x

x+(12.75-2x)+((7.50-x)/2)=9.75

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Find the value of z

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therefore

The cost of each ice cream cone is $4.50

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6 0
3 years ago
How much did he spend?
bearhunter [10]

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Step-by-step explanation:

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6 0
3 years ago
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what is the equation of a line that is perpendicular to 8x+6y=-5 the answer is b

4 0
3 years ago
What is the length of the missing side
chubhunter [2.5K]

Answer:

a=8

Step-by-step explanation:

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a^2 +15^2 = 17^2

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Subtract 225 from each side

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Take the square root of each side

sqrt(a^2) = sqrt(64)

a = 8

6 0
3 years ago
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