Answer:
40 mph
Step-by-step explanation:
To find the maximum speed at which the car can travel, as the distance it requires to stop is 168 feet, we just need to use the value of d = 168 in the equation, and then find the value of s:
168 = 0.05s^2 + 2.2s
0.05s^2 + 2.2s - 168 = 0
Using Bhaskara's formula: we have:
Delta = 2.2^2 + 4*0.05*168 = 38.44
sqrt(Delta) = 6.2
s1 = (-2.2 + 6.2)/0.1 = 40 mph
s2 = (-2.2 - 6.2)/0.1 = -84 mph (a negative value does not make sense as 's' is the speed of the car)
So the maximum speed of the car is 40 mph
Answer:
The answer is 33.6.
Hope that helps?
Step-by-step explanation:
Answer: $22.50
Step-by-step explanation:
If each piece of candy cost $4.50 you have to multiply that by 5.
4.50+4.50+4.50+4.50+4.50
Or 4.50x5
=$22.50
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Answer:
does it tell you what x is equivalent to?
Step-by-step explanation:
You have $1.75 left
Step-by-step explanation:
Given,
Number of quarters already have = 20
Percent of quarters found = 40% of already have
Number of quarters found = 
Number of quarters found = 
Number of quarters found = 8
New total = 20+8 = 28 quarters
Percent of quarters spent = 75%
Number of quarters spent = 
Number of quarters spent = 
Number of quarters spent = 21
Quarters left = 28-21 = 7
1 quarter = 25 cents
7 quarters = 25*7 = 175 cents
$1 = 100 cents
175 cents = 
You have $1.75 left
Keywords: division, addition
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