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Mars2501 [29]
3 years ago
10

5(3+t)-3(t + 1)= need these soon pls​

Mathematics
1 answer:
zysi [14]3 years ago
5 0

Answer:

hope it helps

plz mark as brainliest

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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
(3x + 5)º<br> (6x + 13)°
Zigmanuir [339]

Answer: 18x2 + 69x + 65

Step-by-step explanation:

(3x + 5) (~6x + 13)

1. 3x(6x + 13) + 5(6x + 13)

2. 18x2 + 39x + 5(6x + 13)

3. 18x2 + 39x + 30 + 65

4. 18x2 + 69 + 65

6 0
2 years ago
Find the unit rate. Round to the nearest hundredth, If necessary.<br> $290 for 12ft
9966 [12]

Answer:

24.17

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
PLEASE I WILL GIVE BRAINLIEST AND I WIL REPORT ANSWERS THAT HAVE NOTHING RI DO WITH MATH THANKS ​
Rudiy27

Answer:

26.1533936612

Step-by-step explanation:

bc

h= 6 square root 3

24^2+6 square root 3^2=684

square root 684=26.1533936612

7 0
2 years ago
How many cups is a gallon?
Masja [62]
16 i think is the amount of cups in a gallon :) 
7 0
3 years ago
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