Answer:
(3,-1)
Step-by-step explanation:
So we have the system of equations:
As directed, add straight down. The y-variable will cancel:
Now, divide both sides by 5. The left cancels:
So x is 3.
Now, substitute 3 for x in either of the equations:
Substitute 3 for x:
Multiply:
Subtract 9 from both sides:
So, our answer is: x=3, y=-1 or (3,-1).
And we are done :)
-2x^2 + 5x -3 =0
Find the discriminate:
In the given formula a = -2, b = 5 and c = -3
The discriminate is found using the formula b^2 - 4(ac)
Replace the letters with their values:
5^2 - 4(-2*-3)
25 - 4*6
25-24 = 1
When the discriminate is greater than or equal to 0, there are two real solutions.
The answer is c) 2
Answer:
Example Problem
Solve 2x+3=15.
Example Answer
x=6
How to Check Your Answer with Algebra Calculator
First go to the Algebra Calculator main page.
Type the following:
First type the equation 2x+3=15.
Then type the @ symbol.
Then type x=6.
Try it now: 2x+3=15 @ x=6
Step-by-step explanation:
Answer:
If you input a value of x then we get the output f(x) = y, which is the function of x. This is a function of x. Hence, x² = y is a function of x.
Step-by-step explanation:
The answer would most likely be A, if not, pick D
