The answer is D) Yes; because x and y must be integers, and integers are rational.
Answer:

Step-by-step explanation:
Let's look at the prime factors of 210.
210 = 2 * 3 * 5 * 7

Since no factor appears more than once, this radical cannot be simplified.
Answer:
half dollar, quarter, dime and nickel
Step-by-step explanation:
When you sum it up it will give you 90 cents.
Equation 1: y = -2x + 1
Equation 2: y = 2x - 3
Since both equations already have y isolated, we are able to simply set the right side of both equations equal to each other. Since we know that the value of y must be the same, we can do this.
-2x + 1 = 2x - 3
1 = 4x - 3
4 = 4x
x = 1
Then, we need to plug our value of x back into either of the original two equations and solve for y. I will be plugging x back into equation 2 above.
y = 2x - 3
y = 2(1) - 3
y = 2 - 3
y = -1
Hope this helps!! :)