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zhannawk [14.2K]
3 years ago
9

The price of a 9-minute phone call is $2.25. What is the price of a 19-minute phone call?

Mathematics
1 answer:
defon3 years ago
4 0

Answer:

$4.75

Step-by-step explanation:

9/2.25=19/x

cross product

2.25*19=9*x

42.75=9x

x=42.75/9

x=4.75

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The circumference of Tyler's bike tire is 72 inches. What is the diameter of the tire?​
pantera1 [17]

Answer:

The diameter is 22.92 inches

Step-by-step explanation:

Hello, I can help you with this question

in this case we know the circumference of a circle, and we need to find out the diameter.

let's remember

the radius of a circle can be defined as

radius=\frac{diameter}{2}\\ or\\diameter=2* radius( equation\ 1)\\

also

circumference=2*\pi  *radius(equation2)\\

Step1

replace the value of the circumference of tyler's bike in equation 2  and isolate radius to find radius

72 inches=2*\pi  *radius\\\\radius=\frac{72}{2*\pi  } \radius =11.46\ inches

Step 2

now, replace the value of radius into equation 1 to find diameter

radius=11.46 in

diameter=2* radius( equation\ 1)\\\\diameter=2*11.46\\diameter=22.92

so, the diameter is 22.92 inches

I really hope it helps, have a great day.

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3 years ago
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Nimfa-mama [501]

Answer:

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Step-by-step explanation:

Combine like terms look for all the numbers that have y attached and combine them

7y +12y=19y

Look for terms where nothing is attached it's just the number combine them

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8 0
3 years ago
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Answer:

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Step-by-step explanation:

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6 0
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Using the discriminant, how many real solutions does the following quadratic
vazorg [7]

Answer:

D one real solution

Step-by-step explanation:

x^2 - 8x + 16 = 0

This is in the form

ax^2 +bx + c = 0

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3 years ago
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REY [17]

Answer: (x+2)

Step-by-step explanation:

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4 years ago
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