Luimt problems
1. liliana has $2.10 in nickels and quarters in her purse. she has 12 more nickels than
quarters. how many coins of each type does she have?

The coins of each type are, 17 nickel coins and the 5 quarter coins.

Step-by-step explanation:

Given:

Liliana has $2.10 in nickels and quarters in her purse.

She has 12 more nickels than  quarters.

Now, to find the coins of each type she have.

Let the number of nickels be

Let the number of quarters be

The total worth of coins = $2.10.

The value of a quarter is $0.25 and the value of a nickel is $0.05.

According to question:

⇒

⇒

Adding both sides by 3 we get:

⇒

Dividing both sides by 0.30 we get:

⇒

The number of nickels = 17.

Now, to get the number of quarters we put value of :

The number of quarters = 5.

Therefore, the coins of each type are, 17 nickel coins and the 5 quarter coins.

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.