Question

Solve this:
1. Evaluate 3y^2 - 5y - 6 when y = -2.
2. A rectangle is five times as long as its width. If its area is 180cm^2, then the length of the rectangle is
3. A motorist drives at 100 km/h. How many minutes will it take her to travel d km?
4. One of the factors of mn - nq - n^2 + mq is (m - n). The other factor is what?
5. The sum of the interior angles of a polygon is 1080°. How many sides has the polygon?
6. If 7/2x - 4/3x = 13/12, then x =
7. Find the roots of the equation x^2 + 12x - 28 = 0. The greater of the two roots is
8. What is the sum of the roots of the equation x^2 - 3x + 2 = 0?
9. Find -28 (mod 3)
10. If 8 + 9 = 3, in which modulo is the addition done?

Answer 1

3(-2)^2-5(-2)-6=3×4+10-6

=12+4=16