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
Answer:
0.733 repeating
Step-by-step explanation:
use your calculator
Answer:
Step-by-step explanation:
<u>Evaluating Functions</u>
Given a function y=f(x), evaluate the function for x=a means substituting the variable for the given value.
We have the function:
Find f(-1):
Answer:
area: 72 perimeter: 36
Step-by-step explanation:
area of big rectangle, 10x6=60
height of triangle:4 multiplied by 3 (6/2=3) =12 12+60=72
length of sides added together: 10+10+6+5+5=36
