Answer:
7 is the first one
5 is the second one
27.5 is the third one
Step-by-step explanation:
Arrange the numbers in ascending order and find the number in the middle
if there are two numbers in the middle, add them and divide by two to find the average
Hope this helps!
Answer:
12
Step-by-step explanation:
Legs of 45-45-90 are equal so 4x-12=x+6.
3x=18, x=6
Plug back in and the length is 12
Answer:
D
Step-by-step explanation:
Combine like terms
Hey with that question you multiply the number in the Parentheses with the exponent, once you do that to each number multiply the two numbers together.
Answer:
50 degrees
Step-by-step explanation:
Okay! So first off, because this is NOT a right triangle, we can't use soh cah toa. That means we can either use the law of sines or the law of cosines.
Because we only have sides here and no angles, we are forced to use the law of cosines.
c^2 = a^2 + b^2 − 2ab cos(C)
c = 6
b = 7.5
a = 6.5
36 = 6.5^2 + 7.5^2 - 2(6.5)(7.5)cos(C)
36 = 98.5 - 97.5cos(C)
-62.5 = -97.5cos(C)
0.641 = cos(C)
angle C = cos^-1(0.641)
angle C = 50.13 which is around 50 degrees
Remember! A dumb thing i always used to do in geometry was use radians instead of degrees, be sure to use degrees here because you are looking for degrees. Radians are for things involving not degrees, but PI.