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fenix001 [56]
3 years ago
7

The total flying time for two flights is 6 hours. The flight time for the first flight is half of the second. How long is each f

light?
I need an expression :)
Mathematics
2 answers:
gavmur [86]3 years ago
4 0

Answer:

First flight= 2, second = 4

Step-by-step explanation:

Let's say the first flight = F and the second flight = S

If the first flight is half of the second, then S = 2F

F + S = 6

That means

F + 2F = 6

3F = 6

F = 6/3

F = 2

If the first flight equals 2 hours, and it is half of the second, then S = 2F, which is 4.

lina2011 [118]3 years ago
3 0
2x=6
2 represents the how many flights
x represents how long each was (in hours)
6 represents the total time for each flight( in hours)

Hope this helped!!!
:)
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What is the value of the expression 5y2 + 4x when x = 2.5 and y = 3?
galina1969 [7]

Answer:

The answer is 40

Step-by-step explanation:

5*3=15

15*2=30

4*2.5=10

So 30+10=40

Hope this helps!!

7 0
3 years ago
Is 0-2=-1 a solution
saw5 [17]

Answer:

no

Step-by-step explanation:

because 0-2 is -2 so,

-1 and -2 are not equal

7 0
3 years ago
What expression represents the width of the rectangle
Oduvanchick [21]
<h3><u>Answer:</u></h3>

  • <u>x </u><u>-</u><u> </u><u>8</u>

<h3><u>Solution</u><u>:</u></h3>

We are given a rectangle with one of its sides ( length ) equal to ( x - 7 ) Meters.

  • Also we are given the area of the rectangle as x² - 15x + 56 square meters .

We have to find the expression for another side of the rectangle i.e it's width

We will use the formula of area of rectangle to find the expression :

  • <u>A</u><u>rea </u><u>=</u><u> </u><u>length </u><u>×</u><u> </u><u>width</u>

Therefore,

‎ㅤ‎ㅤ➝ A = l × w

‎ㅤ‎ㅤ➝ x² - 15x + 56 = ( x - 7 ) × w

‎ㅤ‎ㅤ➝ x² - 8x -7x + 56 = ( x - 7 ) × w

‎ㅤ‎ㅤ➝ (x² - 8x )( - 7x + 56 ) = ( x-7 ) w

‎ㅤ‎ㅤ➝ x( x - 8 )-7( x - 8 ) = ( x - 7 )w

‎ㅤ‎ㅤ➝ ( x - 8 )( x - 7 ) = ( x - 7 )

‎ㅤ‎ㅤ➝ ( x - 8 )w = ( x - 8 )( x - 7 )

‎ㅤ‎ㅤ➝ w = ( x - 8 )( x - 7 ) / ( x - 7 )

‎ㅤ‎ㅤ➝ <u>w = ( x - 8 )</u>

8 0
2 years ago
PLEASE HELP NEED HELP ASAP
Ivahew [28]
10)
200 / 5 = 40

answer
p >= 40

11)
$15 per hour
so
15p >= 200
solve for p

p >= 200/15
p >= 13.33 or p?= 13 1/3

minimum hours = 13.33 or 13 1/3
8 0
4 years ago
There are 16 bacteria in a beaker.Four hours later there are 228 bactriea in the beaker.What is the rate of change per hour in t
saul85 [17]

Answer:

Rate of change per hour in the number of bacteria is r=0.28

Step-by-step explanation:

Given : There are 16 bacteria in a beaker and four hours later there are 228 bacteria in the beaker.  

To find : What is the rate of change per hour in the number of bacteria.

Solution :

At initial number of bacteria is 16

After 4 hours number of bacteria is 228

Rate of change per hour is given by

A=Pe^{rt}

where A = total number of bacteria, P = initial number of bacteria, r= rate of change , t= time  

228=16(e^{4r})

14.25=(e^{4r})

Taking log both side,

log(14.25)=4r

1.15=4r

0.28=r

Therefore, Rate of change per hour in the number of bacteria is r=0.28


6 0
3 years ago
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