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snow_lady [41]
3 years ago
9

7 x 5e = 105 plz help ​

Mathematics
2 answers:
Anon25 [30]3 years ago
8 0

e=3.

So this is how I approached this. Since 7 is being multiplied, I divided both sides by 7 so 105/7 = 15. Then it becomes simple as 5e=15. We divide both sides by 5 and get e=3. Tip: just try isolating the variable and then life is much easier.

SSSSS [86.1K]3 years ago
5 0

Answer:

e = 3

Step-by-step explanation:

7 × 5e = 105

35e = 105

35e ÷ 35 = 105 ÷ 35

e = 3

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THE RATIO OF ANNUAL INCOMES OF A AND B IS 4 :3 AND THEIR ANNUAL EXPENDITURE IS 3 :2 IF EACH OF THEM SAVES SHILLINGS 1000 A YEAR
pickupchik [31]

<u>Answer:</u>

Annual Income of A=4x=4*1000=4000

and

Annual Income of B=3y=3*1000=3000

<u>Step-by-step explanation:</u>

<u>Given Data:</u>

Ratio of annual income of A and B=4:3

Ratio of expenditures of A and B=3:2

Saving of A and B=1000

<u>Required:</u> Annual Income of A and B=?

<u>Solution:</u>

If ratio of income of A and B is 4:3

then let Income of A=4x and Income of B=3x

If ratio of expenditure of A and B is 3:2

then let expenditure of A=3x and expenditure of B=2x

Therefore,

      4x-3x=1000...........Eq(1)

and 3x-2x=1000..........Eq(2)

subtracting Eq(1) and Eq(2), we get

4x-3y=1000\\-(3x-2y)=1000\\......................\\x-y=0

x=y.....Eq(3)

putting x=y in Eq(1), we get value of x as

4x-3x=1000

x=1000\\thus, y=1000 \\ because x and y are equal in Eq (3)

Now, Annual Income of A=4x=4*1000=4000

and Annual Income of B=3y=3*1000=3000

7 0
3 years ago
The radius r of a circle is increasing at a rate of 7 centimeters per minute. (a) find the rate of change of the area when r = 1
VikaD [51]
Dr /dt = 7

A = pi r^2

dA / dr = 2pir

dA/dt = dA/dr  * dr/dt = 2pir * 7  = 14pir

when r = 12   rate of change of the area =  14*pi*12  =  168pi

            =  527.79 cm^2 / minute to nearest hundredth
5 0
3 years ago
The data depicted in a histogram show approximately a normal distribution if the distribution
Slav-nsk [51]

Answer:

bunches up in the middle and tapers off symmetrically at either end

Step-by-step explanation:

By definition a normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Because the data towards the mean is more frequent in occurrence, the graph peaks at the center. The data occurs less frequently at the tail ends of the distribution, thus the shape of the distribution is a bell shape that peaks at the center and tapers off towards the tails.  The key characteristic is that the distribution of data is perfectly symmetrical.

This is why the answer is:

The data depicted in a histogram show approximately a normal distribution if the distribution <u>bunches up in the middle and tapers off symmetrically at either end.</u>

4 0
4 years ago
What is the sum of the first 60 positive integers?. (Points : 1). 60. . 61. . 1800. . 1830
stira [4]
Hello,


if 0 is a positive integer
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else
       sum=1+2+3+...+60=(1+60)*60/2=61*30=1830
end if

Answer D: 1830
In US, 0 is not positive, in Europe yes!!!

4 0
4 years ago
at noon a train leaves Washington DC headed for Charleston South Carolina a distance of 500 Miles the train traveling at a speed
Svetlanka [38]
Is this a question? if it is it’s x over the x times 45
6 0
3 years ago
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