21. Sophie is trying to find two numbers, x and y, that satisfy the following conditions.
1. The sum of x and y is 35.
2. The sum of 2x and 2y is 70.
Sophie wrote the following system of equations and graphed them on
her calculator.
(x+y = 35
(2x+2y= 70
How many solutions does this system of equations have?

What is the equation of the following graph in vertex form? parabolic function going down from the left through the point zero comma twelve and through the point two comma zero and turning at the point four comma negative four and going up through the point six comma zero and continuing towards infinity courtesy of texas instruments a: y = (x − 4)2 − 4 b: y = (x + 4)2 − 4 c: y = (x + 2)2 + 6 d: y = (x + 2)2 + 12

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.