Expand Your answer should be a polynomial in standard form.
(-r^2+ 3r– 7)(r^2– 7) =
PLEASE HELP !!

Which matrix multiplication is possible?

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?