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denpristay [2]
3 years ago
7

which represents the solution(s) of the system of equations, y=x^2-2x-15 and y=8x-40? determine the solution set algebraically

Mathematics
1 answer:
Harrizon [31]3 years ago
7 0
y=x^2-2x-15 (1) y=8x-40 (2)

8x-40=x^2-2x-15
X^2+10x-25=0
(x-5)^2
×=5 y=0
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What is the resulting equation when the expression for y in the second equation is substituted into the first equation-3x+2y=-3
Alex

Answer:

x=-5/11, y=-9/11. (-5/11, -9/11).

Step-by-step explanation:

3x+2y=-3

y=4x+1

---------------

3x+2(4x+1)=-3

3x+8x+2=-3

11x=-3-2

11x=-5

x=-5/11

y=4(-5/11)+1

y=-20/11+11/11

y=-9/11

5 0
3 years ago
Help with this math homework
fomenos
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5 0
3 years ago
Can u show me a graph for the solution of |X| + 1 < 3
Mariana [72]
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7 0
3 years ago
On Monday, Randy earned 12 points in his game.
Gnom [1K]

Answer:

[see below]

Step-by-step explanation:

Randy first won 12 points on Monday. He earned as twice as many on Tuesday.

12 * 2 = 24

Randy scored 24 points Tuesday.  

Randy earned 3 more points than Tuesday's points the next day.

24 + 3 = 27

Randy earned 27 points Wednesday.

12 + 24 + 27 = 63

Randy should earn a total of 63 points for the 3 days.

Hope this helps.

3 0
3 years ago
Evaluate.<br><br> 8/13 ÷ 2/3<br><br> A.16/39<br> B.12/13<br> C.11/15<br> D.24/13
ludmilkaskok [199]

Answer:

  B.  12/13

Step-by-step explanation:

The answer choices suggest that you intend the problem to be interpreted as ...

  (8/13)/(2/3) . . . . . parentheses are required

  = (8/13) × (3/2) = (8·3)/(13·2) = (8·3)/(2·13)

  = (8/2) × (3/13) . . . . making use of the associative property

  = 4 × 3/13 = 12/13

_____

Your calculator can help with these. You do need to get the parentheses right.

3 0
3 years ago
Read 2 more answers
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