Answer:
y = 3
x =7
Step-by-step explanation:
to solve this system of equations using substitution method we say, let
5x + 4y = -22
.................... equation 1
2x – 3y = 5...................... equation 2
from equation 2
2x - 3y = 5
2x = 5 + 3y
divide both sides by 2
we have;
2x/2 = (5+3y)/2
x =(5+3y)/2................................ equation 3
put x = (5+3y)/2 in equation 1
5x + 4y = -22
.................... equation 1
5(5+3y)/2 + 4y = -22
(25 + 15y)/2 + 4y = -22
multiply through by 2
25 + 15y + 8y = -44
25 + 23y = -44
collect the like terms
23y = -44 - 25
23y = -69
divide both sides by 23
23y/23 = -69/23
y = 3
put the value of y= 3 into equation 3
x =(5+3y)/2................................ equation 3
x = (5+3(3)]/2
x = 5+9/2
x =14/2
x =7
Try dividing 160 by 5 (not by 4). Does your answer now make sense?
Step-by-step explanation:
Jane+Philip= 6 days
Jane = 5 more than P
J= 5+p
(substitute)
5+p+p=6
2p=1
Philip can do the work in 7days.
Jane= 7+5= 12 days
Answer:
Step-by-step explanation:
Given
Required
The domain and range
A function is represented as:
Where
domain
range
So, we have:
