Find two points on the graph that the line crosses through almost perfectly. It looks like (1,10) and (9,1) will do.
Use them to compute the slope:
m = (1 - 10) / (9 - 1)
= -9/8
Then set up the "point-slope form":
y - y0 = m * (x - x0)
You choose some point (x0, y0) that the line crosses through. We already know the line passes through (1,10) pretty well, so let's use that.
x0 = 1
y0 = 10
Now finish plugging into the equation:
y - 10 = -9/8 * (x - 1)
The above equation will work fine for an answer, but let's go a step further and solve for y.
y - 10 = -9/8x + 9/8
y = -9/8x + 9/8 + 10
y = -9/8x + 9/8 + 80/8
y = -9/8x + (9 + 80)/8
y = -9/8x + 89/8
So you subtitute y=3x into
2x+y=15
so
2x+(3x)=15
add like terms
5x=15
divide both sides by 5
x=3
subtitute x=3 into first equation (y=3x)
y=3(3)
y=9
Answer:
The unit price for for crawfish at Shop A is $3 per pound and Shop B is also $3 per pound
Step-by-step explanation:
6/2=3
15/5=3
Answer:
Peyton: 6 years old
Matt: 24 years old
Justin: 9 years old
Step-by-step explanation:
P= Peyton M= Matt J= Justin
P=J-3
M=4P
J+P+M=39
4J-12=M 4J-12=39-J-P
5J-51=-P P=J-3
5J-51=-J+3 J=9
P=9-3 P=6
M=4(6) M=24
The answer for the equation is (4, -2)
