PLz HeLp!!!

which are equivalent expressions for (-7x^3 + 9x^2 - 3) (-2x^2 - 5x +6)?

Select the number of ways in which a line and a circle can intersect

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

The value of cos 30° is the same as which of the following?