Can someone me with 2 last questions? will mark : )

9) 180 = 45 + b + 3b

10) 180 = 2Y + X + Y

Step-by-step explanation:

9) a triangle's interior angle sum is 180. So you would format out the problem as:

180 = 45 + b + 3b.

10) the triangle is an isosceles triangle from the description of 2 equal angles. It states Z is twice as big as Y, so you would put it as 2Y. So the equation would be 180 = 2Y + X + Y

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

you save $70

discount would be 35% off

step-by-step explanation: