Por favor ayuda cuanto es 50=t-1?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

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