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3 years ago

Can anyone please help me out?? 3rd time posting this question and I really need help!!!!

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

7 0

Answer: C

please mark brainliest

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4m/5-2m/3=1 solve the equation

katen-ka-za [31]

Answer:

m = 7.5

Step-by-step explanation:

4m/5 - 2m/3 =1

We want to get rid of the fractions so multiply each side by 5*3 or 15

15 *(4m/5 - 2m/3 ) =1*15

15 *(4m/5) -15( 2m/3 ) =1*15

Canceling like factors

3* 4m -5*2m = 15

Multiply

12m - 10m = 15

2m = 15

Divide each side by 2

2m/2 = 15/2

m = 7.5

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3 years ago

Write each fraction in its simplest form. 8 8 II 25

WINSTONCH [101]

Answer:

$\frac{88}{5^{2} }$

Step-by-step explanation:

There are no fractions I am assuming the fraction is 88/25 which would be 88/5^2

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3 years ago

25 letters in 4 days

pentagon [3]

In order to write 25 letters in 4 days you would need to write 6.25 a day

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3 years ago

??? Answer toys word problem

Alenkasestr [34]

6 is a constant, so we know that y is greater than or equal to 6.

x is just a variable, but it has to be positive, so it could be anything greater than or equal to 0.

Total flour = white flour + wheat flour, therefore y = x + 6.

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4 years ago

The sum of the digits of a 2-digit number is 10. If 18 is added to the number, the digits of the new number are those of the ori

Aliun [14]

Answer:

Step-by-step explanation:

Let $(ab)$ represent a number with $a$ in the ten's position and $b$ is the one's position.

This means $(ab)$ actually has value of $10a+b$ .

We are given the sum of those digits of $(ab)$ is 10; this means $a+b=10$ .

It says if 18 is added to the number $(ab)$ , then the result is $(ba)$ .

So $(ab)$ has value $10a+b$ and

$(ba)$ has value $10b+a$ .

We are given then:

$(ab)+18=(ba)$

$10a+b+18=10b+a$

Subtract $10a$ on both sides:

$b+18=10b+a-10a$

Simplify:

$b+18=10b-9a$

Subtract $b$ on both sides:

$18=10b-b-9a$

$18=9b-9a$

Divide both sides by 9:

$2=b-a$

Rearrange by commutative property:

$2=-a+b$

So the system of equations we want to solve is:

$a+b=10$

$-a+b=2$

-------------------------Add equations together (this will eliminate the variable $a$ and allow you to go ahead and solve for $b$ :

$0+2b=12$

$2b=12$

Divide both sides by 2:

$b=\frac{12}{2}$

Simplify:

$b=6$

If $b=6$ and $a+b=10$ , then $a=4$ . $a=4$ since 4+6=10.

So the original number is (46).

18 more than 46 is 18+46=(64) which is what we wanted.

We also have the sum of 4 and 6 is 10 as well.

7 0

4 years ago