2_10 i'm guessing means 2/10, so in percentage, it would be 20%
Answer:
x = 3, y = 4 and z = -5.
Step-by-step explanation:
Use the elimination method:
-3x + 2y + z = -6...........(1)
x + 3y + 2z = 5..............(2)
4x + 4y + 3z = 13..........(3)
Multiply the first equation by -2:
6x - 4y - 2z = 12 Add this to equation (2):
7x - y = 17...........(4)
Now Multiply equation (2) by 3 and equation (3) by -2
3x + 9y + 6z = 15 ............(5)
-8x - 8y - 6z = -26............(6) Adding (5) + (6):
-5x + y = -11..........(7)
Now Add (7) and (4):
2x = 6
x = 3.
Now substitute for x in (4):
7(3) - y = 17
-y = 17 - 21 = -4
y = 4.
Finally substitute for x and y in equation (3) to find z:
4(3) + 4(4) +3z = 13
3z = 13 - 12 - 16 = -15
z = -5.
Hey there! :D
Area= πr^2
So, the radius is half the diameter.
14/2= 7
7^2= 49
49π <== the answer
I hope this helps!
~kaikers
Answer:
$77.4
Step-by-step explanation:
GIVEN: On the trip from KC to Springfield, the church van consumed 
gallons of gas to go 
miles. If gas cost 
per gallon.
TO FIND: Cost of a round trip to Springfield.
SOLUTION:
Distance of springfield from KC 
As it is a round trip total distance 
As gallons gas used for miles distance
gas required for 
mile 
gallons
gas required for 
miles 
gallons
cost of one gallon of gas 
cost of 
gallons of gas 
Hence cost of roundtrip to Springfield is $77.4
