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podryga [215]
3 years ago
7

Two planes start from the same point and fly opposite directions. The first plane is flying 20 mph slower than the second plane

in 2 h the planes are 540 mi apart. Find the rate of each plane
Mathematics
2 answers:
alexira [117]3 years ago
5 0

Answer:

4x+50=470

4x=420

x=105 mph First plane

x+25= 105+25=130 mph Second plane.

R^2

Step-by-step explanation:

UNO [17]3 years ago
4 0

Answer:

This

Step-by-step explanation:

let x = rate of the slower plane (First plane!)

x+25 = rate of the faster plane (Second plane!)

The planes fly for 2 hours, where Distance = R*T

Distance between the planes = SUM of the distances.

R*T + R*T= 470 miles

2*x + 2*(x+25)=470

2x+2x + 50 = 470

4x+50=470

4x=420

x=105 mph First plane

x+25= 105+25=130 mph Second plane.

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katovenus [111]

Simplifying

15 + -5(4x + -7) = 50


Reorder the terms:

15 + -5(-7 + 4x) = 50

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Combine like terms: 15 + 35 = 50

50 + -20x = 50


Add '-50' to each side of the equation.

50 + -50 + -20x = 50 + -50


Combine like terms: 50 + -50 = 0

0 + -20x = 50 + -50

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Combine like terms: 50 + -50 = 0

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Solving

-20x = 0


Solving for variable 'x'.


Move all terms containing x to the left, all other terms to the right.


Divide each side by '-20'.

x = 0.0


Simplifying

x = 0.0

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3 years ago
WILL MARK YOU BRAINLIEST ANSWER WHAT YOU CAN PLS
maks197457 [2]

Answer:

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Please help me compute standard deviation! Here is the problem, as written.
aleksandr82 [10.1K]

Answer:

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Step-by-step explanation:

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\sigma=\sqrt{\sum [(x-\mu)^{2}\cdot P(x)]}

Here,

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\mu=\sum x\cdot P(x)

Consider the Excel table attached below.

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\mu=\sum x\cdot P(x)=32.3

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\sigma=\sqrt{\sum [(x-\mu)^{2}\cdot P(x)]}

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Thus, the standard deviation for the income of super shoppers is 76.12.

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1 year ago
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