So there's this Kahoot I'm doing. It says " what is 2+x = 3+y, solve for x and y". I do not get this we have not even studied this b4 I'm only in 7th grade pls help me :'(

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys