Answer:
x=-1, y = 2, z = 1
Step-by-step explanation:
We are given with three equations and we are asked to find the solution to them.
2x + 2y + 3z = 5 ------------- (A)
6x + 3y + 6z = 6 --------------(B)
3x + 4y + 4z = 9 ---------------(C)
Step 1 .
multiplying equation (A) by 3 and subtracting B from the result
6x + 6y + 9z = 15
6x + 3y + 6z = 6
- - - = -
_______________
3y+3z=9
y+z=3
y=3-z ----------------- (C)
Step 2.
Substituting this value of y in equation B and C
6x + 3(3-z) + 6z = 6
6x+9-3z+6z=6
6x+3z=-3
2x+z=-1 ----------------(D)
3x + 4(3-z) + 4z = 9
3x+12-4z+4z=9
3x=-3
x=-1 ------------ (E)
Putting this value f x in (D)
2(-1)+z=-1
-2+z=-1
z=1
Now we put this value of z in equation (C)
y=3-z
y=3-1
y=2
Hence we have
x=-1, y=2 and z=1
The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count. i hope this helped :) ❕
Answer:
The answer would be D t is less than or equal to 375
Step-by-step explanation:
Because he wants to save 275 and 275+375 is 650. so if he wants to save at least 275 he can only spend a max of 375.
Answer:
96.58
Step-by-step explanation:
The formula for simple interest is ...
I = Prt
where P is the principal, r is the rate, and t is the time period in years.
Exact interest is computed using 365 days per year, so the time period is ...
t = 150/365
Then the interest is ...
I = 2350(0.10)(150/365) = 96.58
Answer:
36
Step-by-step explanation:
10*3600/1000
36000/1000
36 km/hr
