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N76 [4]
4 years ago
13

A flight is plotted on a map having the scale 1 inch equals 400 miles on the map it is 9 1/2 inch from point a to point B if a p

lane flies this distance at the speed of 300 miles how long will the trip take
Mathematics
1 answer:
Marina86 [1]4 years ago
8 0

Answer:

12 hours and 40 minutes

Step-by-step explanation:

There are really 2 questions here.

One

1 inch / 400 miles = 9 1/2 inches / x            Cross multiply

1*x = 400 * 9.5

x = 3800

Two

The plane goes 300 miles / hour

d = r * t

d = 3800 miles

r = 300 miles / hour               Substitute

3800  = 300 * t                      Divide by 300

t = 3800 / 300

t = 12 2/3 hours

1 hour = 60 minutes

2/3 hour = y

y = 2/3 * 60

y = 40 minutes

Total time = 12 40 minutes or 12.666666 hours.

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5 0
3 years ago
Ashley multiplied 9 x 0.942 and got 84.78. How can you use estimation to show that Ashley's answer is wrong? Use whole numbers t
exis [7]

Answer:

Calculate the percent value:

0.942 =

0.942 × 100/100 =

(0.942 × 100)/100 =

94.2/100 =

94.2%;

In other words:

1) Multiply that number by 100.

2) Add the percent sign % to it.

Answer:

0.942 = 94.2%

Step-by-step explanation:

7 0
3 years ago
How would you choose to reduce the system shown to a 2 × 2? Explain why you would choose this approach. –3x + y – 2z = 10 (1) 5x
gladu [14]
-3x + y - 2z = 10      |* -1
3x  -  y  +2z = -10
5x  -2y -2z =  12 
---------------------------      I add these equations   term by term 
8x  - 3y  = 2 

-3x  + y - 2z =10                       ⇒  -3x  + y   - 2z =10
x     -y    +z = 23         | *2              2x   - 2y + 2z = 46
                                                   -----------------------------  I add these eq.
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8x  - 3y  = 2 
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4 0
3 years ago
Read 2 more answers
What is the value of x in this triangle?
dimulka [17.4K]
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 Clearing x we have:
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4 0
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