Answer:
2nd one is right but first one is not mark 1st one right
adding a negative number is the same as subtracting a positive number. This question is the same as 10.5-8.3
Answer:
Step-by-step explanation:
In similar polygons, corresponding sides are in same proportion

Cross multiply
7*(4x-3)=3*(x+1)
28x - 21 = 3x + 3
28x - 3x - 21 = 3
25x = 3 + 21
25x = 24
x = 24/25
x = 0.96
Scale factor = 7 : 3
Answer:
A number
Step-by-step explanation:
it cant be nothing