Work out the size of angle A.
A
11 cm
9 cm
38°
B
С

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

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25