Answer:
cos (a+b)= cos a cos b - sin a sin b
Step-by-step explanation:
I had to answer this question too, but I don't know the explanation. I just saw it in this Khan Academy video. https://www.khanacademy.org/math/precalculus/x9e81a4f98389efdf:trig/x9e81a4f98389efdf:angle-addition/v/cosine-addition-identity-example
Answer:
B, She stopped to change a flat tire
Step-by-step explanation:
from minute 3 - 5, Anita was at a standstill. she did not speed up and pass Susana, as she wasnt moving
she didnt go up a hill because that requires moving
she did not win the race because there is more to the graph
Answer:
y = 1/4x-1
Step-by-step explanation:
The slope intercept form of a line is
y = mx+b
m is the slope and b is the y intercept
but we do not know the slope y know the x intercept
(4,0 )
and the y intercept
( 0,-1)
We can calculate the slope using these points
m = (y2-y1)/ (x2-x1)
= (-1-0)/(0-4)
= -1/-4
= 1/4
Now we can put the slope = 1/4 and the y intercept =-1 into the formula
y = 1/4x-1
R = b+180
<span>b = .2(r+b) </span>
<span>so, </span>
<span>b = 60 </span>
<span>r = 240 </span>
<span>Total beans = 300 oz </span>
<span>After the transfer, 30% = 90 oz</span>
Answer:
A. 20,000 square feet
Step-by-step explanation:
The description is that of a rectangle 200 ft long and 100 ft wide. The area is the product of those dimensions:
area = (200 ft)(100 ft) = 20,000 ft²