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Nady [450]
3 years ago
6

HELP ME ASAP PLEASEEEE

Mathematics
1 answer:
Andreyy893 years ago
8 0

Answer:

D, 110

Step-by-step explanation:

I you want I can explain this step by step but that's just the answer

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Pls help, thank you
Lemur [1.5K]

Answer:

  • y = -3x² + 7x - 9

Step-by-step explanation:

<u>Given quadratic function:</u>

  • y = ax² + bx + c

<u>Points on the graph:</u>

  • (-2,-35), (1,-5), (3,- 15)

<u>Substitute values of x and y and solve the system of equations:</u>

  • -35 = a(-2)² + b(-2) + c ⇒ -35 = 4a - 2b + c   ⇔ eq 1
  • -5 = a(1)² + b(1) + c ⇒ -5 = a + b + c               ⇔ eq 2
  • -15 = a(3)² + b(3) + c ⇒ -15 = 9a + 3b + c       ⇔ eq 3

<u>Subtract eq 2 from eq 1:</u>

  • -35 - (-5) = 4a - 2b + c - a - b - c
  • -30 = 3a - 3b
  • b = a + 10                                                         ⇔ eq 4

<u>Subtract eq 2 from eq 3:</u>

  • -15 - (-5) = 9a + 3b + c - a - b - c
  • -10 = 8a + 2b
  • b = -4a - 5                                                       ⇔ eq 5

<u>Compare eq 4 and eq 5, solve for a:</u>

  • a + 10 = -4a - 5
  • a + 4a = -5 - 10
  • 5a = -15
  • a = -3

<u>Find the value of b using eq 4:</u>

  • b = -3 + 10
  • b = 7

<u>Find the value of c using eq 2:</u>

  • -5 = -3 + 7 + c
  • c = -5 - 4
  • c = -9

<u>We now have a, b and c:, the function is:</u>

  • y = -3x² + 7x - 9

8 0
2 years ago
Read 2 more answers
Greidella<br>Merthemen<br>Class ac<br>Convert the following<br>e, 2750g to<br>kg​
avanturin [10]

Answer:

there is a problem in question is hafe only

8 0
2 years ago
What is it called when your equation is 0x=5
laila [671]
I just write not possible
8 0
3 years ago
A square has a perimeter of 44. What is the length of side?
natka813 [3]
There are 4 sides on a square, and all 4 sides have the same length.
If the perimeter is 44, you would do 44/4.
44= permiter
4= number of sides
7 0
3 years ago
Read 2 more answers
Please answer all questions except D. It has already been answered. Will give brainliest, ty!
VashaNatasha [74]

Answer: c) 0.531441 = 0.53

e) 3.375 = 3.38 or 3.4

f)0.0289 =0.03

Step-by-step explanation: everyone will say that they will mark as brainliest but nobody does, you guys lie, but I still give the answers

3 0
3 years ago
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