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4 years ago

A piano teacher charges students $20.25 each month, plus $5.25 per hour for lessons.

Mathematics

2 answers:

Tomtit [17]4 years ago

8 0

Answer:

99$

Step-by-step explanation:

you take the 5.25$ per hour and multiply it by the 15 hours, and then you add the 20.25$ per month

Semmy [17]4 years ago

3 0

Answer:

suppose the number of 2 hours lessons are x and 1 hour lessons are y; thus,

2x+y=25

50x+30y=690

to get the values of x and y we solve the quadratic equation given;

from the top equation:

y=25-2x.......i

substituting i in our second equation we get:

50x+30(25-2x)=690

50x+750-60x=690

-10x=-60

thus;

x=6

hence we conclude that the number of 2 hours classes are 6 hours

Step-by-step explanation:

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svetoff [14.1K]

Answer:

Area of a parallelogram would be 13.46

Step-by-step explanation:

Since area of a parallelogram is represented by the formula

Area = $\frac{1}{2}$ ( $(D_{1}*D_{2})$

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