Answer:
= x+25
Step-by-step explanation:
Hope this helps. Have a nice day.
Answer:
5,1
Step-by-step explanation:
7x + 4y = 39
2x + 4y = 14
since, the 4y same for both equation then we can eliminate the 4y by subtracting the two equation
7x + 4y = 39
2x + 4y = 14
---------------- -
5x + 0 = 25
5x = 25
x = 25/5 = 5
then we can input (subtitute) the value of x into the equation, I choose 2x + 4y = 14
2x + 4y = 14
2(5) + 4y = 14
10 + 4y = 14
4y = 14 - 10
4y = 4
y = 4/4 = 1
or if your teacher ask you to use elimination to find the value of x we can write like this
7x + 4y = 39
2x + 4y = 14
make the coeficient of x in both equation same
7x + 4y = 39 (x2)
2x + 4y = 14 (x7)
so
14x + 8y = 78
14x + 28y = 98
--------------------- -
0 - 20y = -20
-20y = -20
y = (-20)/(-20) = 1 (same answer right)
so the correct answe is
(5,1)
Answer:
3
Step-by-step explanation:
in slope-intercept form, the slope is the x's coefficient, which in this case is 3,
so, m=3
Answer:
y = -2x + 27
Step-by-step explanation:
Firstly, we shall need to reform the given line equation;
y-7 = 1/2 ( x + 2)
y - 7 = x/2 + 1
y = x/2 + 1 + 8
y = x/2 + 8
Comparing this with y = mx + c
where m is the slope, then the slope of the line is 1/2
Since the line we are looking for has a slope perpendicular to this line, it means that the product of their slopes is -1
m1 * m2 = -1
1/2 * m2 = -1
m2 = -2
So we want an equation with slope -2 passing through (6,15)
we use the point slope method here;
y-y1 = m(x-x1)
y-15 = -2(x-6)
y-15 = -2x + 12
y= -2x + 12 + 15
y = -2x + 27
