Sam evaluated the expression x² y for x = 7 and y = 9. he got a value of 49. which of the following statements is correct?

sam's answer is correct.
sam forgot to multiply.
sam squared wrong.

Which of the following contains a variable?

Apolygon is shown on the graph: a polygon is shown on the coordinate plane. vertices are located at 3 comma 5, 1 comma 3, 1 comma 1, 2 comma 0, 4 comma 0, 5 comma 1, and 5 comma 3. what effect will a translation 3 units down and 2 units left have on the polygon? be sure to address how it could impact the angles, side lengths, and congruency between the original pre-image and the image. xd i need

Sections of prefabricated woods are each 5 1/3 feet long, how long are 7 1/2 sections placed end to end?