How do you solve and simplify 2/5+1/4+7/10=

Hello!

⇒ 27/20

Step-by-step explanation:

Since the denominators are equal, then combine the fractions.

Add by the numbers.

Hope this helps!

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-Charlie

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

-2

7 - 9 = -2

reversed:

-2 + 9 = 7