Answer:
where are the options
Step-by-step explanation:
Answer:
100cm
Step-by-step explanation:
Because 50x2=100 cm
We are given that ratio of cars Sam has built to cars Tyrone has built is 3:4.
Let us assume that Sam built
cars and Tyrone built
.
Since we are given that total number of cars they built is 42. Therefore, we can set up:

Therefore, Sam built
cars and Tyrone built
cars.
Value of k=4
5(4)=20
2(4)=8
20-8=12
Answer:
cosA = - 
Step-by-step explanation:
Using the double angle identity
cos2A = 2cos²A - 1 , then
cosA = 2cos²(
) - 1 , that is
cosA = 2 × (
)² - 1
= 2 ×
- 1
=
- 
= - 