Answer:
Sin X=Cos Y
Step-by-step explanation:
Objective: Understand trigonometric relations such that
Cosine and Sine are similar to complementary angles that if X+Y are complementary angles,
Cos X= Sin Y and Cos Y= Sin X
Let us assume that the number of days she practiced the piano to be "d"
Since she practiced 2/3 hours a day, the total number of hours would be: 2/3*d
Now we are given the total number of hours during summer that she practiced be be equal to 32/23
So we equate 2/3 * d to 32/23 to find d
2/3*d = 32/23
d = (32/23)/ (2/3)
d = (32/23) * (3/2)
d = 48/23 hours
The equation that can be used to find the number of days that she practiced piano during the summer is 2/3*d = 32/23
Answer:
76.32
Step-by-step explanation:
Move the decimal point two times to the left 48. --> .48
Multiply .48 by 159
= 76.32
Answer:
93.15
Step-by-step explanation:
Multiply 230.00 dollars and 0.55 = 126.50
Subtract 230.00 dollars and 126.50 = 103.50
Multiply 103.50 and 0.10 = 10.35
Subtract 103.50 and 10.35 = 93.15
