Solving the second equation for y..
2x-y=7 divide both sides by -1
y-2x=-7 add 2x to both sides
y=2x-7
When a solution exists, y=y, so we can say:
2x-7=2x+3 subtract 2x from both sides
-7=3
-1 != 3
Since the above is never true, there are no solutions to this system of equations.
Intuitively, this is because both lines have the same slope, they are parallel, and have an different y-intercept, thus they will never cross each other...
Answer:
-9.3n + 8.7
Step-by-step explanation:
Answer:
a. 256
b. 255
Step-by-step explanation:
If a set has “n” elements, then the number of subset of the given set is 
and number of proper subset is 
A = {3, 4, 5, 6, 7, 9, 10, 11}
Here, n = 8
No of subsets
No of proper subsets
= 
Alright, this is an easy one!
So we are trying to get rid of the y value so the first equation has -3y. The second equation has 2y. What values would make these equal.
A.) 2*-3y = -6y and 3 * 2y = 6y.
Now take -6y + 6y and that gives you 0.
Thus, the answer is A.) <span>Multiply the first equation by 2 and the second equation by 3. </span>
Answer:
the answer is −
1
2
+
4
Step-by-step explanation:
i hope this helps
