I have 20 math problems,?

Question

I just need help with these 4.

Evaluate the expression

1. 7+8/2

Evaluate the expression for the given value of the variable.

2. 2g times 5 when g=4

Evaluate the expression.

3. 4 times 2+15/3

EXPRESSIONS WITH FRACTION BARS. Evaluate the expression. Then simplify the answer.

4.

13 - 4

_________

18 - 4to the second power + 1

Answer 1

1.  7 + 8/2

7/1 + 8/2

14/2 + 8/2

22/2 = 11

the answer is 11

2.  2(4) x 5

20 x 5= 100

the answer is 100

3. 4 x 2 + 15/3

4 x 2 + 5

8 + 5

13

the answer is 13

4.

13 - 4

---------------

18 - 16 + 1

9

----

2 + 1

9

---

3

reduces to 3

the answer is 3

hope i helped!!  btw, what grade are you in?

Answer 2

1. 11

2. 40

3. 28

4. 3

1: You have to follow the order of operations, and you have to divide first. So 8/2 = 4, and 7+4 = 11

2: 2g5 = 10g. When g = 4, 10(4) = 40.

3. Order of operations again. 4 (2 + 15/3). 15 / 3 = 5. 5 + 2 = 7. 7(4) = 28 (I had a typo above... sorry).

4. Order of operations. 13 - 4 = 9. 4^2 = 16. 18 - 16 + 1 =3. 9 / 3 = 3.

I hope this helps!