Answer:
x = 3.25
y =4.75
Step-by-step explanation:
In order to Solve the following system of equations below algebraically using substitution method we say that;
let;
8x - 4y = 7
..................... equation 1
x + y = 8.......................... equation 2
from equation2
x + y = 8.......................... equation 2
x = 8 - y.............................. equation 3
substitute for x in equation 1
8x - 4y = 7
..................... equation 1
8(8-y) - 4y = 7
64-8y-4y=7
64-12y=7
collect the like terms
64-7 = 12y
57= 12y
divide both sides by the coefficient of y which is 12
57/12 = 12y/12
4.75 = y
y =4.75
put y = 4.75 in equation 3
x = 8 - y.............................. equation 3
x = 8 -4.75
x = 3.25
to check if your answer is correct, put the value of x and y in either equation 1 or 2
from equation 2
x + y = 8.......................... equation 2
3.25 + 4.75 =8
8=8.................... proved
120
times 12 - 360
it should give you the right answer if you solve the problem like that
Add 4and 2/3 cups, 1 and 1/4 cups,1 and 1/3 cups and 3/4 cups all together and divide it by 5
Y - y 0 = m ( x - x 0 )
x 0 = 6, y 0 = -3, m = 1/2
The point-slope form of the equation is:
y + 3 = 1/2 ( x - 6 )
Answer:
-1 , |-2| , 3 , 4 , |5|
Step-by-step explanation:
upright bars | | mean absolute value
upright bars | | make the number inside them
positive
|-2| = 2
|5| = 5
4, |-2|,3,|5|,-1
-1 , |-2| , 3 , 4 , |5|