Solution: The missing reason in Step 8 is substitution of
.
Explanation:
The given steps are used to prove the formula for law of cosines.
From step 5 it is noticed that our equation is
..... (1)
From step 7 it is noticed that the value of
is
.
So by substituting
for
in equation (1) we get the equation of step 8, i.e.,

Hence, the missing reason in Step 8 is substitution of
.
Answer:
id like to help but the picture is really blurry so im afraid that i cant. but i know there are others who can!
Step-by-step explanation:
i hope this helps you!
Answer:
Option B, 1
Step-by-step explanation:
tan 45° = 1/1 = 1
Answer:
Runner 1 has the fastest pace
Step-by-step explanation:
The first one we need to find the slope
m = (y2-y1)/(x2-x1) = (40-0)/(4-0) =40/4 = 10 minutes per mile
The second is 8.5 minutes per mile
The third we need to find the slope
m = (y2-y1)/(x2-x1) = (90-72)/(10-8) =18/2 = 9 minutes per mile
Answer:
She will need 10.5 quarts
Step-by-step explanation:
ratio of yellow to blue paint = 3:2
7 ÷ 2 = 3.5
3 x 3.5 = 10.5 quarts