The ratio of boys to girls in a class is 3.2. There are 15 boys in the class. How many total boys and girls are in the class

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16