Answer:
i say it is a
Step-by-step explanation:
Answer:
x=5, y=2, z=2
Step-by-step explanation:
y=3x-13
-3x+4y+2z = -3x + 4(3x-13) + 2z = 9x+2z-52 = -3
9x + 2z = 49 ... (1)
2x-4y-z = 2x-4(3x-13)-z = -10x-z+52 = 0
10x + z = 52 ... (2)
(2)*2-(1): 11x = 55 <u>x = 5</u>
y = 3x-13 = 15-13 = 2 <u>y=2</u>
z = (49-9x) / 2 = 2 <u>z = 2</u>
Answer:
y intercept=13
Step-by-step explanation:
find the gradient=2/3
replace one co-ordinate with x,y and equate to the gradient
Y=2X+13
y intercept x=0
y=13
Answer:
x + 4x + 1 = 76
Step-by-step explanation:
Let
x = Leon's amount
y = Laci's amount
"Laci has $1 more than 4 times Leon"
i.e y = 1 + 4x ----------------(1)
"together they have $76
i.e x + y = 76 ----------------(2)
if you take equation (1), and substitute for the value of y in equation (2):
equation (2) becomes:
x + (1 + 4x) = 76
or
x + 4x + 1 = 76 (answer)