Answer:
18
Step-by-step explanation:
The equation would be x^2+24^2=30^2. Solving would get 18.
For the first one it is 1 whole
Answer: 800 envelopes
Step-by-step explanation:
Sam and her friends are working at a rate of 100 letters in envelopes per hour per person. So, if there are 4 people helping including sam, you just have to multiply 400 by 2 hours, which will give you 800.
Answer: -13
Step-by-step explanation:
2-(3^2)+4-3-7 = -13