What is the value of r in the equation?

Negative 1.5 (4 minus r) = negative 12
–6
–4
4
6

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).