19 coins total, all quarters and dimes, totaling $4. System of equations that can be used to find the number of quarters, ‘q’ and dimes, ‘d’ is: q+d=19 and 0.25q+0.1d=4. How many quarters?

The table represents a linear function. what is the slope of the function? –6 –4 4 6

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?