4 [ 5 (12 + 3) - 2 ] - 7
4 [ 5 (15) - 2 ] - 7
4 [ 75 - 2 ] - 7
4 [ 73 ] - 7
292 - 7
285
In word form it would be seventy six percent and as a fraction it would be 76/100 or 76
__
100
Answer:
The solution is (-5, -2).
Step-by-step explanation:
We'll use "elimination by addition and subtraction."
Multiply the second row by -2. Our system
– 7x – 10y = 45
-3x - 5y = 25
becomes:
– 7x – 10y = 45
+6x + 10 y = -50
-------------------------
-x = 5, so that x = -5.
Substituting -5 for x in the second equation results in
-3(-5) - 5y = 25, or 15 - 5y = 25. This reduces to
-5y = 10, so that y must be -2.
The solution is (-5, -2).
Answer:
It has a solution.
Step-by-step explanation:
Step 1: Rearrange 1st equation into slope-intercept form
2x + y = 15
y = 15 - 2x
Step 2: Rearrange 2nd equation into slope-intercept form
x = 15 - 2y
2y + x = 15
2y = 15 - x
y = 15/2 - x/2
Step 3: Rewrite systems of equations
y = 15 - 2x
y = 15/2 - x/2
Since the two lines are not parallel, they will have a solution.
