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Volgvan
3 years ago
13

The equation s= 3√5x can be used to estimate the speed, of a car in miles per hour, given the length in feet,x, of the tire mark

s it leaves on the ground. A car traveling 90 miles per hour came to a sudden stop. According to the equation, how long would the tire marks be for this car?
Mathematics
1 answer:
V125BC [204]3 years ago
3 0

Answer:180ft

Step-by-step explanation:

s= 3√5x

S=90

So 90= 3√5x

30= 3√5x

Square both sides

900 = 5x

x = 900/5 = 180 ft

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Expand and simplify (x - 2)(x - 1)
Whitepunk [10]

Answer:

x^2 -3x+2

Step-by-step explanation:

(x - 2)(x - 1)

FOIL

first: x*x = x^2

outer: -1*x = -x

inner: -2*x =-2x

Last: -2*-1 =2

Add together

x^2 -x-2x+2

Combine like terms

x^2 -3x+2

5 0
3 years ago
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The store bought them for $100 and marked them up 25% but no one was buying them! So the store discounted them 25%, what is the
kogti [31]

Answer:

100

Step-by-step explanation:

25% of 100=25

100+25=125

125-25=100

It goes up 25% then it gets discounted back down to its original price

7 0
3 years ago
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100 pounds of chocolate is packaged into boxes each containing 1^1/4 pounds of chocolate. Each box is then sold for $1.75. What
sertanlavr [38]

Answer:

$140

Step-by-step explanation:

Total Amount of chocolate = 100 Pounds

Amount of chocolate in one box = 1 1/4 Pounds =  5/4 Pounds

Number of boxes = 100/(5/4) = 80 boxes

Cost of one box = $1.75

Total selling price = 80×1.75 = 140

The total selling price for all the boxes of chocolate is $140

8 0
2 years ago
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Dave rolls a die and flips a coin. How many outcomes are in the sample space?
kogti [31]
Well the are six sides and numbers on the dices and two sides on the coin so there would be 8 outcomes

5 0
4 years ago
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In a​ film, a character is criticized for marrying a woman when he is three times her age. He wittily​ replies, "Ah, but in 25ye
Sonbull [250]

Answer:age of the man: 75 age of the woman:25

Step-by-step explanation:

First, We need to define the variables

x: age of the man

y: age of the woman

at the first time he has three times her age

x=3y                (1)

in 25 years time

(x+25)=2(y+25)                 (2)

we clear the equation

X+25=2y+50

X=2y+25

we substitute in the (1) equation:

2y+25=3y

y=25

x=3*25=75

5 0
4 years ago
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