Answer:
C
Step-by-step explanation:
Ratio should be 4:5
12:15 is 4:5
20:25 is 4:5
28:35 is 4:5
36:46 is 4:5
<span>Length of outer track = sum of length of 10 pieces = circumference of the outer circle
if R is the Radius of outer circle then...
Circumference of the outer track = 2pi*R
Similarly the circumference of the inner track (with radius r) = 2pi*r
length of each outer piece is 3.4 inch more than length of inner piece
So total outer length is 10*3.4 =34 inches more than the inner length.
=> Outer Circumference - Inner Circumference = 34 inches
=> 2pi*R - 2pi*r = 34
=> 2pi(R -r) = 34
=> R-r = 34/2pi = 5.41 inches
=> R-r = Width of the track = 5.41 inches</span>
Answer:
-30
Step-by-step explanation:
Evaluate 4 a + 7 b + 3 a - 2 b + 2 a where a = -5 and b = 3:
4 a + 7 b + 3 a - 2 b + 2 a = -5×4 + 7×3 - 5×3 - 2×3 - 5×2
4 (-5) = -20:
-20 + 7×3 - 5×3 - 2×3 - 5×2
7×3 = 21:
-20 + 21 - 5×3 - 2×3 - 5×2
3 (-5) = -15:
-20 + 21 + -15 - 2×3 - 5×2
-2×3 = -6:
-20 + 21 - 15 + -6 - 5×2
2 (-5) = -10:
-20 + 21 - 15 - 6 + -10
-20 + 21 - 15 - 6 - 10 = 21 - (20 + 15 + 6 + 10):
21 - (20 + 15 + 6 + 10)
| 1 |
| 2 | 0
| 1 | 5
| 1 | 0
+ | | 6
| 5 | 1:
21 - 51
21 - 51 = -(51 - 21):
-(51 - 21)
| 5 | 1
- | 2 | 1
| 3 | 0:
Answer: -30
The answer would be slope=-4
Hope this helps
Have a great day/night
Answer: first put the equation of the line given into slope intercept form by solving for why you get why equals negative 2X +5 so the slope is negative to perpendicular lines have a opposite reciprocal slopes so the slope of the line we want to find is 1/2 plugging in the point given to the equation why equals 1/2 X plus B and solving Furby we get B equals six
Step-by-step explanation:
