9514 1404 393
Answer:
B = (-4, 5)
Step-by-step explanation:
Reflection over the origin changes the signs of the coordinates.
(x, y) ⇒ (-x, -y)
(4, -5) ⇒ (-4, 5)
Point B is (-4, 5).
First find the amount of tax by multiplying 21 × 8.5%.
.085 × 21 = 1.785 = 1.79 (rounded)
Now add the tax back into the price...
21 + 1.79 = $22.79
4x+19=7x+16
4x=7x-3
-3x=3
x=1
To solve this you just need to convert this equation to slope intercept form to do this you just need to isolate y. To isolate -3y subtract 9x from both sides and your problem should look something like this 3y = -9x + 15 the -9 is the slope but you need to simplify that in order to do that divide both sides of the problem by 3 now your problem should look like this y = 3x + 5. The answer is B or positive 3
The solution is (2, -4).
We can solve this with the elimination method. Multiply the first equation by -2 and then add the two equations.
-20x + -12y = 8
20x + 10y = 0 Add the two equations
-2y = 8
y = -4
Now, just input -4 for y into either equation, you will get 2 for x.
