Answer: 729
Step-by-step explanation:

3^-2 = 1/9
3^-4 = 1/81
(-1)^2 = 1
1/(1/9 * 1/81 * 1)
1/ 1/729 = 729
Answer:
1/30
Step-by-step explanation: There are 30 students 19 play instr, 10 play spor,
8 who do both. Their is one student that was left out so the answer is 1/30
Answer:
y = 2/5x + 3
Step-by-step explanation:
For #19 part A :
By vertical angles and then same side interior angles 3x + 2x = 180
5x = 180
x = 36
For #19 part B:
You are correct with the 35, but you missed the fact that the 105 angle is supplementary with the unknown angle inside the triangle. So:
180 - 105 = 75
Then:
180 = 35 + 75 + x
180 = 110 + x
x = 70
Last question:
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There is no picture given for us to answer the question!