2 years ago

solving systems of equations by graphing/given the system of equations and their graphs. identify the solution

Mathematics

1 answer:

ipn [44]2 years ago

7 0

Answer:

(-2,-3)

hope it will help you

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The sum of three numbers is 62. The second number is equal to the first number diminished by 4. The third number is four times t

alexdok [17]

Let the three numbers be x, y and z respectively, then
x + y + z = 62 . . . (1)
y = x - 4 . . . (2)
z = 4x . . . (3)

The above three expressions could be used to represent the numbers.

Solving the three equations, putting (2) and (3) into (1) gives
x + x - 4 + 4x = 62
6x - 4 = 62
6x = 62 + 4 = 66
x = 66/6 = 11
x = 11.
y = 11 - 4 = 7
z = 4(11) = 44

x = 11, y = 7, z = 44.

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A rectangle has an area of 102 cm2. The length of the rectangle is 17 cm.