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

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form