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Ivan
3 years ago
15

Help me with this problem please a and b

Mathematics
1 answer:
nadya68 [22]3 years ago
5 0
(a) Compare your quadratic for h to the general quadratic ax² +bx +c. Perhaps you can see that ...
  a = -16
  b = 128
You use these numbers in the given formula to find the time when the ball is highest.
  t = -b/(2a) = -128/(2(-16)) = 4 . . . . . . the time at which the ball is highest


(b) Evaluate the quadratic to find the height at t=4.
  h = -16(4)² +128(4) +21
  h = -256 +512 +21
  h = 277
The maximum height of the ball is 277 ft.

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3 lb 9oz + 5lb 10 oz.
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Answer:

9 lb 3 oz

Step-by-step explanation:

(3 + 5) lb + (9 + 10) oz

8 lb + 19 oz

16 oz = 1 lb

(8 + 1) lb + (19 - 16) ox

9 lb 3 oz

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8 0
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If 9 + 10 = 21 <br><br> What’s 10 + 9?
Gala2k [10]
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8 0
2 years ago
Read 2 more answers
Samantha just opened a new restaurant. She earned $550 on the first day and $750 on the third day that she was open for business
mr Goodwill [35]

Answer:

Step-by-step explanation:

If Samantha's earnings continue to increase at the same rate, this means that her earning is increasing arithmetically.

If she earned $550 in the first day, we can say the first term is $550

If she earned $750 on the third day, we can say the third term is $750

For us to know by how much her money is increasing, we need to find the common difference d formed by the sequence

550, x , 750

T1 = 550

T2 = x

T3 = 750

Common difference d = T2-T1 = T3-T2

x - 550 = 750 - x = d

Let's calculate the second term first i.e x

Since x - 550 = 750 - x = d

x - 550 = 750 - x

Collect like terms

x+x = 750+550

2x = 1300

x = 1300/2

x = 650

d = T2-T1

d = x - T1

d = 650-550

d = 100

Hence her money keeps increasing by $100 each day

8 0
3 years ago
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