Answer:
y=25h-2000
Step-by-step explanation:
you would need to subtract the 2000 in order to know when you made a profit from buying the piano. and then the 25h is the amount of hours teaching.
70%=70/100=7/10
what you do is shade 7 of the squares and say that is 21
now each square is worth the same
so 21/7=3
each square is worth 3
10 squares
3 times 10 is 30
the number is 30
see diagram
Answer:
Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.
Explanation:
Marks received by Marta in four tests = 86, 84, 97 and 89
Let mark received in fifth test be x
We have average of five test is more than or equal to 90
So we have
![\frac{86+84+97+89+x}{5} \geq 90\\ \\ 86+84+97+89+x\geq 450\\ \\ x\geq 94](https://tex.z-dn.net/?f=%5Cfrac%7B86%2B84%2B97%2B89%2Bx%7D%7B5%7D%20%5Cgeq%2090%5C%5C%20%5C%5C%2086%2B84%2B97%2B89%2Bx%5Cgeq%20450%5C%5C%20%5C%5C%20x%5Cgeq%2094)
So Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.
Answer:
138.2degrees
Step-by-step explanation:
178.2 - 40 = 138.2
Answer:
5.32
Step-by-step explanation: