What value of d makes the equation 5d-3=2d+6 true?

I NEED HELP WITH THIS ASAP

If square root x = -7, then x= -49 true or false

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?

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.