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Delicious77 [7]
3 years ago
7

A store was selling lawn mowers for $69. The repair

Mathematics
2 answers:
ale4655 [162]3 years ago
8 0

Answer: he is right

Step-by-step explanation:

Natali5045456 [20]3 years ago
5 0

Answer:

$84.87

Step-by-step explanation:

The mover costs $69

23% of 69 is $15.87

add the two together to get $84.87

(or just multiply 69 by 1.23)

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Holly can walk 3.75 miles per hour. At that same rate, how far can she walk in 2.5 hours?
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3.75 miles per hr........in 2.5 hrs =
3.75 * 2.5 = 9.375 miles
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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
7. As you consider your decision, you think about how most cars lose value over time. If a fully loaded Volkswagen Beetle deprec
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3 years ago
You visit an amusement park with your family over the summer. Each adult ticket costs $45 and each child ticket costs $32. Let '
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Answer:

45a + 32c

Step-by-step explanation:

a tickets at $45 per ticket cost 45a

c tickets at $32 per ticket cost 32c

The total cost is

45a + 32c

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2 years ago
Which weights more 2.48 or 2.5​
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2.5 weighs more. It’s a greater number than 2.48
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