Question 13 (5 points) (09.04 MC)
Using the following equation, find the center and radius:
x2 + 2x + y2 + 4y = 20 (5 points)
1) The center is located at(1, 2), and the radius is 25.
2) The center is located at (-1,2), and the radius is 25.
3) The center is located at (-1, -2), and the radius is 5.
4) The center is located at (1, 2), and the radius is 5.

Combine like terms to make a simpler expression 3z+z

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

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?