I need help I need this plz

The correct answer is 5 2/15

Step-by-step explanation:

Since the numerators on both numbers are opposite, you have to go through an equation to make them equal.

4/5 and 1/3 don't have the same numerator. Because of this, you have to find the least common multiple.

5, 10, 15

3, 6, 9, 12, 15

Now that we found said number, we have to multiply the denominators so they match as well. How we do that is by multiplying the number by how many times the numerator has been multiplied to.

Since 5 had to be multiplied by 3 to get to 15, you would multiply 4 by three, giving you 12/15. Same goes with the other fraction, 3 times 5 got us 15, so we would multiply 1 by 5, giving us 5/15.

Now it's as simple as adding. 12/15 + 5/15 = 17/15, which will make 1 2/15. Add that to the whole numbers you have and you will get 5 2/15. (Note: You cannot simplify 2/15, so you leave it as is)

11. 31/5

12. -4.3

13. 7/10

14. 10.2

Step-by-step explanation:

11. multiply the denominator 5 by the whole number 6 and add the result to the numerator

5 x 6 = 30 + 1 = 31/5

12. -2.5 + (-1.8)

when a positive and negative sign are placed together they, change to a negative since hence, -4.2

13. find the least common multiple of 5 and 10 which is 10

    divide 10 by 5 and 10 by 10

   5/ 10 = 2     10/10 = 1

   2x3 = 6     1x1 = 1

   6+1/10

  7/10

14. 8-(-2.2)

multiply the negative sign within the parenthesis with the sign outside of it

8 + 2.2

 10.2

Hopes this helps :)