A store sells jump rope cost the same amount . During a sale the store reduces the price of each jump by $1.90. Marc spends $12.78 on 2 jump ropes at the sale price . What was the price of 1 jump rope before the sale ? Enter the answer in the comments

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can someone me: the midsegment through the legs of an isosceles triangle is 4 in. find the sides of the triangle if its perimeter is 20 in. ,   and point g is the centroid of the right △abc with hypotenuse ab=18 in. find cg.

a is the best answer choice