{5} is the solution set of
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x^2-5x+25=0,
x^2+10x+25=0,
x^2-10x+25=0,
x^2+5x+25=0).

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?