→18 points! ← answer the question on the picture. then explain your answer.

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?

Agraphic designer created a logo on eight and a half by 11 inch paper. in order to be placed on a business card, the logo needs to be one and 7/10 inches by 2 and 1/5 in. what is the scale factor of the dilation

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2