The value of x in this system of equations is 1
3x + y = 9
y = 4x + 10
substitute the value of y in the first equation:
2. combine like terms
-3. apply the subtraction property of equality
4. apply the division property of equality
3x + (-4x + 10) = 9
-x + 10 = 9
1
what is the value of y?
y=

x=-1/7, y=66/7. (-1/7, 66/7).

Step-by-step explanation:

3x+y=9

y=4x+10

3x+4x+10=9

7x+10=9

7x=9-10

7x=-1

x=-1/7

y=4(-1/7)+10

y=-4/7+10

y=-4/7+70/7

y=66/7

b

step-by-step explanation:

answer: the correct option is d.

explanation:

it is given that the triangle j'k'l' shown on the grid below is a dilation of triangle jkl using the origin as the center of dilation.

from the given graph it is noticed that k(4,8) and k'(2,4). let origin is defined by o and scale factor is defined by k, then

    (1)

distance formula,

put these values in equation (1).

therefore scale factor is     and option d is correct.