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LUCKY_DIMON [66]
3 years ago
15

The velocity of a car was 30m/s when the driver pushed the brake of the car and it stopped after 2 seconds. Assume that the acce

leration was constant during the braking time.find the acceleration and the distance cut during the braking
Mathematics
1 answer:
Murljashka [212]3 years ago
3 0

Answer:

the "acceleration" is -15m/s (it's negative because it is slowing down, not speeding up[it might just be a positive 15m/s if it is called deceleration and not acceleration])

Step-by-step explanation:

30m/s (starting speed)/2 (the number of seconds it took to stop from 30m/s

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A tire has a diameter of 22". How far will the tire travel in 3 rotations?
frosja888 [35]

Answer:

find the circumfrence and multiply by three

3.142×22=69.14

69.14×3=207.43

=207.43''

Step-by-step explanation:

6 0
3 years ago
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Which of the following expressions represents the verbal description below? the product of 2 times x and the sum of 9 and 5 time
Alexxandr [17]

2x * (9 + 5(x^2)) is the ans

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3 years ago
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Consider the function f(x) = x² – 3x – 4 and complete parts (a) through (C). (a) Find f(a+h); f(a+h)-f(a) (b) Find (c) Find the
Artist 52 [7]

Answer:

(a)

f(a+h)=a^{2} +2ah+h^{2} -3a-3h-4

(b)

f(a+h)-f(a)=2ah+h^{2} -3h

(c)

\frac{df(a+h)}{dx} \left \{ { \atop {a=7}} \right. =2h+11

Step-by-step explanation:

(a)

Simply evaluate (a+h) in the function:

f(a+h)=(a+h)^{2} -3(a+h)-4=a^{2} +2ah+h^{2} -3a-3h-4

(b)

Evaluate (a) in the function:

f(a)=a^{2} -3a-4

Using the previous answers lets calculate f(a+h)-f(a)

f(a+h)-f(a)=a^{2} +2ah+h^{2} -3a-3h-4-(a^{2} -3a-4)=2ah+h^{2} -3h

(c) To find the rate of change of f(a+1) when a=7 we need to calculate its derivate at that point:

\frac{df(a+h)}{dx} \left \{ { \atop {a=7}} \right. =2a+2h-3=2(7)+2h-3=2h+14-3=2h+11

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3 years ago
HELP FASTT !
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Answer:

The total number of carnations bought = 108c.

And the total number of roses bought = 96r.

6 0
3 years ago
What is 40°F minus 32°divided by 1.8
grigory [225]


40 degrees - 32 degrees = 8 degrees

8 degrees divided by 1.8 = 4.4444444 degrees

to divide add a decimal point and zero to the 8 and move the decimal point 1 place to the right in 1.8  and in 8.0 and divide from there

8 0
3 years ago
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