Answer:
1)
2) 
Step-by-step explanation:
Please ignore the squiggle in the middle of the page.
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Answer:
It will take them 5 hours to make 180 cupcakes
Step-by-step explanation:
17 + 19 = 36 x 5 = 180
-4 + -7= -11
When adding negative numbers if the are both negative then you add them. When you have a negative and a positive you subtract. In this problem they just took out the plus sign.
X^2-10x+25 = (x-5)^2 or (x-5)(x-5)