Answer:
x = 10
I used the Interior Angles of a Triangle Rule --The sum of all 3 interior angles in a triangle is always 180°.
(3x + 28) + (5x - 18) + 90° = 180°
Now i can get rid of the parentheses and combine like terms.
3x + 5x + 28 - 18 + 90 = 180
8x + 10 + 90 = 180
8x + 100 = 180
Then i subtract 100 from both sides to isolate x.
8x + 100 - 100 = 180 - 100
8x = 80
Then, i divide both sides by 8 to find x.
8x ÷ 8 = 80 ÷ 8
x = 10
Determine the percent of book she hasn't read.percent = 100% - percent she has read
percent = 100% - 34%
percent = 66%
She hasn't read 66% of the book.
Find the amount of page she hasn't read.page =

page =

page =

page =

page = 165
The number of page she hasn't read is 165. It's more than 125.
c. 13/20 pizza because in all is key for addition, so 2/5 + 1/4 = 13/20 pizza
13:38. There are 13 spaces available and 38 spaces already occupied. 13:38 cannot be simplified, as 13 is a prime number. Hope this helps! ~<em>ArchimedesEleven</em>