It’s -5, always look at your rise and run, they will help!
It is called the conjunction, tha'ts what its called.
V=h*w*l
V= 5*5*5
Volume= 125
Density= Mass*Volume
Answer: 50/5
Because 50 pennies and each nickel is 5 pennies
X + 5y - 10 = 0
x = 2y - 8
Substitute the value of x in the 2nd equation to the 1st equation.
2y - 8 + 5y - 10 = 0
7y - 18 = 0 This is the resulting equation in its simplest form.
Find the value of y to get the corresponding value of x.
7y -18 = 0
7y = 18
y = 18/7
y = 2 4/7
x = 2y - 8
x = 2 (18/7) - 8
x = 36/7 - 8
x = 36/7 - (8 * 7/7)
x = 36/7 - 56/7
x = (36-56)/7
x = -20/7
x = -2 6/7
to check:
x + 5y - 10 = 0
-20/7 + 5(18/7) - 10 = 0
-20/7 + 90/7 - 10 = 0
-20/7 + 90/7 - (10 * 7/7) = 0
-20/7 + 90/7 - 70/7 = 0
(-20+90-70)/7 = 0
0/7 = 0
0=0
