10-15 kinda hard for me

10 is 90 degrees as all angles on a straight line add up to 180

11 is 42 degrees as all angles on a straight line add up to 180

12 is 138 degrees as all angles on a straight line add up to 180

13 is 42 degrees as vertically opposite angles are the same

14 is 132 degrees as i added the other two angles

15 is 138 degrees as i added the other two angles

there you go hope this helped

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm