Y=6
i hope you understand
9514 1404 393
Answer:
cos(20°)
Step-by-step explanation:
The angle difference formula for cosine is ...
cos(α -β) = cos(α)cos(β) +sin(α)sin(β)
If we let α = 50° and β = 30° then this matches the given expression:
cos(50° -30°) = cos(50°)cos(30°) +sin(50°)sin(30°) = cos(20°)
-6.9x - 7.8y = 71.76
to find the y int, sub in 0 for x and solve for y
-6.9(0) - 7.8y = 71.76
-7.8y = 71.76
y = 71.76/-7.8
y = -9.2...so the y int is (0,-9.2)
to find the x int, sub in 0 for y and solve for x
-6.9x - 7.8y = 71.76
-6.9x - 7.8(0) = 71.76
-6.9x = 71.76
x = 71.76 / -6.9
x = -10.4....so ur x int is (10.4,0)
Answer:
Step-by-step explanation:
The max height of an object can be calculated using one the basic projectile motion equations:
Where:
In this case, let's asumme g=9.8m/s^2, besides θ=90, because the water ballon was threw straight up, so:
Answer:
Option c
Step-by-step explanation:
Given that if the coefficient of determination is a positive value, then the regression equation _________
While r the correlation coefficient represents thelinear association between two variables, r has an attached sign.
A positive r represents positive slope and negative r negative slope
But coefficient of determination is the square of r and hence from this R^2 value alone we cannot conclude whether positive or negative relation exists.
As a result,
c. could have either a positive or a negative slope
is right answer