Help me solve on number 5 and 6 (solve for x)

5.) 39

6.) 52

Step-by-step explanation:

5.) 90-51= 39

6.) 74 + 34= 108

180-108= 72

56+72= 128

180-128= 52

x=52

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

location: point 0

step-by-step explanation:

well, -8 to 10 on a number line is 18 spaces.

1/9 of 18 is 2.

so, 4/9 of 18 must be 8.

8 spaces from -8 (a) is 0.

so, 4/9 of the way from -8 to 10 is 0!