Answer:
x = 1
Step-by-step explanation:
<u>Step 1: Choose one of the equations to solve for y:</u>
x - y + 1 = 0
(-y) / -1 = (-1 - x) / -1
y = 1 + x
<u>Step 2: Plug in y into either equation</u>
3x + 2(1 + x) = 7
3x + 2 + 2x - 2= 7 - 2
5x / 5 = 5 / 5
x = 1
Answer: x = 1
Answer:
d
Step-by-step explanation:
if you square root 169, it equals 13
Answer:
A bus traveling north at 25m/s
Step-by-step explanation:
Common sense
Answer:
It would be A.
Step-by-step explanation:
I took the test and also You divide all of them to see what one has the least. The one that has the least is the one you choose.
Let, the number of $20 bill = x
number of $50 bill = y
Equations would be: x + y = 18
& 20x + 50y = 450
Substitute value of x from 1st equation into 2nd equation;
20(18-y) + 50y = 450
360-20y + 50y = 450
30y = 450-360
y = 90/30
y = 3
Now, Substitute value of y in 1st equation,
x + 3 = 18
x = 18 - 3 = 15
So, There were 15 bills of $20 and 3 bills of $50
Hope this helps!
