Independent is x while dependent is y
Answer:
101
Step-by-step explanation:
According to the Law of Cosines, for any △ABC with side lengths a, b, and c, a2=b2+c2−2bccosA; b2=a2+c2−2accosB; and c2=a2+b2−2abcosC
.
The Law of Cosines can be used because all three side lentghs are known.
Set up the equation for the Law of Cosines:
a2=b2+c2−2bccosA
Substitute the known values into the Law of Cosines:
312=222+182−2(22)(18)cosA
Square the values and multiply:
961=484+324−792cosA
Add:
961=808−792cosA
Subtract 808
from both sides:
153=−792cosA
Divide both sides by −792
:
153−792=cosA
According to this equation m∠A
is equal to the inverse cosine function of −153792
. Write this:
m∠A=cos−1(−153792)
Calculate the value of the inverse cosine −153792
on a calculator:
m∠A≈101°
Therefore, m∠A≈101°
.
Answer:
40 hrs
Step-by-step explanation:
She worked 1 hr for 10 and she got 400
Answer:
5 chaperones to 25 students
Step-by-step explanation:
You have to see which expression can be multiplied by 5 since there are 5 chaperones each number of students for example:
5 x 2 = 10
5 x 3 = 15
5 x 4 =20
5 x 5 = 25
3 1/16
Divide 49 by 16 and then multiply the whole number by 16 to find out the 1/16