<span>2y = x + 3 then x = 2y - 3
5y = x - 7 then x = 5y + 7
so
</span>2y - 3 = 5y + 7
2y - 5y = 7 + 3
-3y = 10
y = -10/3
y = -3 1/3
<span>2y = x + 3
</span>2 (-10/3) = x + 3
-20/3 - 3 =x
-29/3 = x
-9 2/3 =x
or
x = -9 2/3
solutions: x = -9 2/3 and y = -3 1/3
You have to substitute 25 for b to simplify the expression.
53(25) -7(25) -6(25) +1
=1325 - 175 - 150 +1
=1001
Answer: C
Step-by-step explanation:
Answer:
45 3/10 mph
Step-by-step explanation:
30 1/5 /2 = 15 1/10
15 1/10 x 3 = 45 3/10 mph
Answer:
The first is a solution, but the second is not
Step-by-step explanation:
we know that
If a ordered pair is a solution of a linear equation, then the ordered pair must satisfy the linear equation (makes the equation true)
we have
<u><em>Verify the first ordered pair</em></u>
Part a) we have (2,-9)
For x=2, y=-9
substitute in the linear equation
----> is true
so
The ordered pair satisfy the equation
The ordered pair is a solution of the equation
<u><em>Verify the second ordered pair</em></u>
Part b) we have (3,-6)
For x=3, y=-6
substitute in the linear equation
----> is not true
so
The ordered pair not satisfy the equation
The ordered pair is not a solution of the equation