Solve for u 2(4u-5)=70 simplify as much as possible

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²