Seven times the sum of 7 and some number is -7. what is the number?

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

Ineed with this problem 21 show steps

Which of the following vectors are orthogonal to (2,1)? check all that apply