In the expression 2(10x) + 15y, x represents the number of hours nina works in a week at a clothing store and y represents the number of hours she works in a week as a babysitter. the expression shows how much money nina has earned this month. which statement is true?

nina has worked a total of x – y hours so far this month.
nina works 15 hours a week at the clothing store.
nina makes 20x dollars at the clothing store each week.
nina makes $10 per hour babysitting each week.

answer: #1 ads up by 8 and i don't know #2

alright so i think for this one it would to draw it out. this may be hard for me to try and draw, but i will do my best on here:

        r

  /       |     \

notice how it forms 2 triangles inside one bigger triangle.

so if we know the angle spr is the same as psr that is saying the measure of angle p is the same as angle s. this means the big triangle psr is either isosceles or equilateral. in both cases, the triangle is perfectly symmetrical when split down the middle, which is in this case rq. because we know it is perfectly symmetrical on both sides, we know that the two triangles inside the bigger one are equal.