Simplify the expression (4x − 3)(x + 5).

a. 4x2 − 17x + 15

b. 4x2 − 17x − 15

c. 4x2 + 17x + 15

d. 4x2 + 17x − 15

The measurement of one angle of a right triangle is 34°. what is the measurement of the third angle?

In the triangles, bc =de and ac fe. if the mzc is greater than the mze, then ab isdfelth

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.