Add the (-4t + 5s) and (-3- 7s + 2t)

Three times the sum of a number and seven is negative thirty-six. what is the number?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Ana drinks chocolate milk out of glasses that each holdof a liter. she has of a liter of chocolate milk in her refrigerator. 10 how many glasses of chocolate milk can she pour?