Suppose you have 20 coins that total $3.00. Some coins are nickels and 1 point some are quarters. Which of the following pairs of equations can you use to
find how many of each coin you have?

n + q = 20

5n + 25q = 300 or 0.05n + 0.25q = 3

Step-by-step explanation:

You know that you have some nickels and some quarters, and together there are 20 coins. So if n represents the number of nickels, and q represents the number of quarters, you can use this equation:

n + q = 20

You also know that together the coins total three dollars. We know that a nickel is worth 5 cents and a quarter is worth 25. So if n and q still represent the number of each type of coin, we can use this equation:

5n + 25q = 300

or

0.05n + 0.25q = 3

The reason I said 300 in the first equation is because you are counting the number of cents. There are 300 cents in 3 dollars.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

1. perpendicular

2. parallel

3. perpendicular