Answer:
Step-by-step explanation:
c^2=a^2+b^2-2abcosC
cosC= (a^2+b^2-c^2)/(2ab)
C=arccos[(a^2+b^2-c^2)/(2ab)]
C=arccos(90^2+55^2-50^2)/(2(90)55)
C=arccos(8625)/(9900)
C=29.4 degrees
Answer: it is not a function
Step-by-step explanation:
Given :
= 3x + 1
The first thing is to make y the subject of the formula, that means we will take the square root of both sides
y = 
since y = , the the value of y could be positive or negative.
For example , 
= ± 2 , since -2 x -2 will also give + 4
For y = to be a function , there must be a unique value for y for each value of x , but this is not the case as y could be positive or negative for a single value of x , so it is not a function.
Answer:
Step-by-step explanation:
I think you wanted a graph...
The y-intercept is the only part of the y axis where the line passes through.
So the slope is 1/3 -- rise/run
So from -1 on the y axis, go up 1 and right 3
keep going until you run out of space and make a line.
Just multiply -2 by 2 and multiply that answer by 2 until the chart is complete on the right side. Basically the same thing for the right side just add
Answer:
2,799 square cm
Step-by-step explanation:
Volume of cone: (1/3)π(9^2)(40)=1,080π
Volume of cylinder: π(3^2)(21)=189π
1,080π - 189π = 891π = 2799.2 square cm
