She spent $65.

Step by Step-

She spent $15 on 3 blouses, so you would multiply and get that she spent $45 on blouses.

You would then add that to the $20 she spent before, and get $65.

Therefore, she spent $65.

Hope this helps!!

4 0

4 years ago

Which of the following represents are fuctions A. I only,B. I and II only,C. I and III only, D. I,II and III

sergey [27]

Where are the functions

6 0

3 years ago

Prove each of these identities.

Stella [2.4K]

Answer:

Identity (a) can be re-written as

$sec x\ cosec x - cot x = tan x$

which we already proven in another question, while for idenity (b)

$(A)\frac 1 {sin x} -sin x = cos x \frac{cos x}{sin x}\\\\(B)\frac {1-sin^2x}{sin x} = \frac {cos^2x} {sin x} \\\\(C) \frac {cos^2x}{sin x} =\frac {cos^2x} {sin x}$

step A is simply expressing each function in terms of sine and cosine.

step B is adding the terms on the LHS while multiplying the one on RHS.

step C is replacing the term on the numerator with the equivalent from the pithagorean identity $cos^2x + sin^2x = 1$

8 0

2 years ago