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Eddi Din [679]
3 years ago
14

Six friends equally share the cost of a gift,they pay$ 90 and receive$ 42 in change how much does each friend pay

Mathematics
1 answer:
777dan777 [17]3 years ago
4 0
I think you do 90-42 which is 48.
Next, do 48/6 and you get....
8
8 is the final answer.
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Please solve the following sum or difference identity.
xxTIMURxx [149]

Answer:

sin(A - B) = \frac{4}{5}

Step-by-step explanation:

Given:

sin(A) = \frac{24}{25}

sin(B) = -\frac{4}{5}

Need:

sin(A - B)

First, let's look at the identities:

sum: sin(A + B) = sinAcosB + cosAsinB

difference: sin(A - B) = sinAcosB - cosAsinB

The question asks to find sin(A - B); therefore, we need to use the difference identity.

Based on the given information (value and quadrant), we can draw reference triangles to find the simplified values of A and B.

sin(A) = \frac{24}{25}

cos(A) = \frac{7}{25}

sin(B) = -\frac{4}{5}

cos(B) = \frac{3}{5}

Plug these values into the difference identity formula.

sin(A - B) = sinAcosB - cosAsinB

sin(A - B) = (\frac{24}{25})(\frac{3}{5}) - (-\frac{4}{5})(\frac{7}{25})

Multiply.

sin(A - B) = (\frac{72}{125}) + (\frac{28}{125})

Add.

sin(A - B) = \frac{4}{5}

This is your answer.

Hope this helps!

6 0
3 years ago
Read 2 more answers
What is the length of AC? <br><br> A. 12cm <br><br> B. 10cm <br><br> C. 15 cm<br><br> D. 20 cm
Anna35 [415]
D.20 cm hope this helps
7 0
3 years ago
H(x)=-x^2-4 and I(x)=2x+3<br> H(I(s))
ICE Princess25 [194]
Easy peasy
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distribute and simplify
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h(I(s))=-4s^2-12s-9-4
h(I(s))=-4s^2-12s-13

3 0
3 years ago
If you have an 81 for your 9 weeks grade but make a 70 on your exam whats going to be your final grade?
Ivan
To do this you need the mean.
(81*9+70)/10 that is the mean equation.
Solve.
(799)/10
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4 0
3 years ago
Is the mix number of 17/3
Licemer1 [7]
This fraction \frac{17}{3}, is not a mixed fraction. 5 \frac{2}{3} is a mixed fraction.
6 0
3 years ago
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