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3 years ago

Mel is 3 years older than Rahfat and Aurelio is twice as old as Mel. The sum of their ages is 57. How old is Mel.

2 answers:

7 0

<span>Mel is 3 years older than Rahfat and Aurelio is twice as old as Mel. The sum of their ages is 57. How old is Mel.
</span>
M=15

julia-pushkina [17]3 years ago

3 0

Mel's Age = xRahfat's Age = x-3Aurelio's Age = 2x 2x + x +x -3 = 574x -3 = 574x = 60x = 15So Mel's age is 15.Hope this helps! :D

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12x -20=n (3x-5)<br><br> I need help I don’t get it please help me.

Salsk061 [2.6K]

Answer:

The value of n = 4 and

The value of x = $\frac{5}{3}$

Step-by-step explanation:

Method I:

As given, 12x -20=n (3x-5) .........(1)

Firstly , take 12x - 20

As 12x - 20 can be written as 4(3x - 5)

∴ equation (1) becomes

4(3x - 5) = n (3x-5)

Divide the equation by (3x-5) , we get

4 = n

Method II:

As given, 12x -20=n (3x-5)

⇒12x - 20 = 3nx - 5n

⇒12x - 3nx = 20 - 5n

⇒3x(4 - n) = 5( 4 - n)

Divide the equation by (4-n) , we get

3x = 5

⇒ x = $\frac{5}{3}$

∴ we get

n = 4 and x = $\frac{5}{3}$

Now, check that value of n and x satisfies the equation or not

12( $\frac{5}{3}$ ) - 20 = 4( 3( $\frac{5}{3}$ ) - 5)

⇒4(5) - 20 = 4(5 - 5)

⇒20 - 20 = 4(0)

⇒ 0 = 0

Hence , we get

The values of x and n satisfies the equation

so, we get

n = 4 and x = $\frac{5}{3}$

5 0

3 years ago

Four friends are out for a walk at night and come to an old bridge. It isn’t safe to cross the bridge without a flashlight, and

ycow [4]

If there are 4 friends and 1 flashlight and only two of them can pass at a time then
that will mean that has to pass 2 times per person and the last time only one

for 32 will be 31*2 + 1 = 63
in a general matter will be
T = (X-1)*2 + 1
T = 2X - 1

so for 3 friends will be (this does not take into consideration the flashlight guy)

T = 3*2 - 1 = 5 times

6 0

3 years ago

I need help with questions on 28, 29, 30, 31. Thx

Rudiy27

28. 10 divided by -2

29. 10y2 over -5

30. 10-5 over -2

31. -10 power of 2 + 6-5 over -2

im not sure if their all right but i hope this helped!

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3 years ago

A rectangular prism with a volume of

garri49 [273]

Answer:

idk

Step-by-step explanation: