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aliya0001 [1]
3 years ago
11

Which represents the solution(s) of the system of equations, y = x2 – 2x – 15 and y = 8x – 40? Determine the solution set algebr

aically. (–5, –80) (5, 0) (5, 0) and (–5, –80) no solutions

Mathematics
2 answers:
saul85 [17]3 years ago
6 0
I couldn't put the other graph but they both the intersected at (5,0)

DIA [1.3K]3 years ago
5 0

Answer:

Given the system of equation:

y = x^2-2x-15          .....[1]

y=8x-40                 ......[2]

Equate these two equations we get;

x^2-2x-15 = 8x-40

Subtract 8x to both sides we have;

x^2-10x-15 =-40

Add 40 to both sides we have;

x^2-10x+25 =0

Using the identity rule:

(a-b)^2 =a^2-2ab+b^2

then;

(x-5)^2 = 0

⇒x-5 = 0

Add 5 to both sides we have;

x = 5

Substitute this value in [2] we have;

y=8(5)-40 = 40-40 = 0

therefore, the solution(s) of the system of equations is, (5, 0)

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Solve the system: 10x-9y=8 21y+15x=0.5
artcher [175]

Answer:

x = 1/2 y = -1/3

Step-by-step explanation:

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Substitute x = (8+9y)/(10) into 21y+15x=0.5 :

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<u>y= -1/3</u>

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<u>x = 1/2</u>

<u />

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