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cestrela7 [59]
3 years ago
14

Solve the system of two equations 2y=8 and 15y=2x-4

Mathematics
1 answer:
damaskus [11]3 years ago
8 0
To find y, divide the first equation by 2.
  y = 4

To find x, use that value for y in the second equation. Add 4, then divide by 2.
  15·4 = 2x -4
  60 +4 = 2x
  64/2 = x = 32

The solution is (x, y) = (32, 4).

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Determine the interest rate if $2300 invested at simple interest for 2 years earns $402.50 interest
Degger [83]
We would need to use the simple interest formula given by:

I = Prn

In this case, I = $402.50
                    P = $2300
                    N = 2 years

Sub these values into the equation,

402.50 = 2300 x r x 2
402.50 = 4600r

Divide both sides by 4600 to get r,

r = 0.0875

Multiply 0.0875 by 100 to get the percentage rate,

0.0875 x 100 = 8.75%

Hope this helped!
6 0
3 years ago
1+3x=-5+x<br><img src="https://tex.z-dn.net/?f=1%20%2B%203x%20%3D%20%20-%205%20%2Bx" id="TexFormula1" title="1 + 3x = - 5 +x" a
Oliga [24]
Get all your variables on same side and solve x=-2
4 0
3 years ago
Which ratio is proportional to 3/5 ?<br> A. 9/10<br> B. 12/20<br> C. 15/20<br> D. 5/7
Ludmilka [50]
Answer would be C. 15/20 because in 3/5 when you multiply both the numerator and denominator by 5, you get 15/20.
3 0
4 years ago
line m contains (6,8) and (-1,2). Line n contains (-1,5) and (5,y). what is the value of y if line m is perpendicular to line n
irakobra [83]

Answer:

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Step-by-step explanation:

mdfgndajfghladjfghadjkfghdafjkkkkkkhkljsfjlk;dsajlkdsajlksdaljkdfjlksdajdkljlsdkjlksdljakljkfsdjlsdljksfadjfas;lkdfj;lksjf;ksjfksajdfsakdjf;laskjfkadj;fsfj

3 0
3 years ago
What is the slope of the ramp shown in the diagram below?
bixtya [17]

Answer:

Step-by-step explanation:

slope = \frac{vertical}{horizontal} = - \frac{3}{10} → A

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3 0
3 years ago
Read 2 more answers
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