How do you do probability?

Mrs. Avery is going to randomly select one student from her class to read a poem out loud. There are 15 boys and 13 girls in her class.

What is P (boy) ?

Dolora spends at least 4 hours per week gardening. She spends more time on routine maintenance such as weeding, pruning, and watering than on harvesting vegetables or flowers. She spends at least 1 hour per week harvesting.

A concession stand sells hamburgers. The revenue from hamburgers is (30x + 45) dollars. The price of a hamburger is $5. Write an expression that represents the number of hamburgers sold.

If she saved $7.29 on her first purchase by using this credit card, what was the total price of the items before the discount?

The ratio of star beads to moon beads in a bracelet is 9:6. What rule can you use to find the number of star Beads if you have 2 moon beads? How many stars do you have?

7 (2x+5) = 4x-9x solve the following equation for a number x. verify that your solution is correct.

A quadratic equation in form ax2 + bx + c = 0 cannot have: a. one real solution. b. one imaginary solution. c. two real solutions. d, two imaginary solutions.

The pH of solution A is 2.4 , while the pH of solution B is 9.4. (a) What are their hydrogen-ion concentrations? (b) How many times greater is the hydrogen-ion concentration of solution A than that of solution B?

Which equation has a variable term in the equation - 6 + 2X = 6x - 9

On may 31, the cash account of bottle's r us had a normal balance of $5,000. during may, the account was debited for a total of $12,200 and credited for a total of $11,500. what was the balance in the cash account at the beginning of may?

When ringing up a customer, a cashier needs 8 seconds to process payment as well as 1 second to scan each item being purchased. If it takes 11 seconds to ring up a customer, how many items are being purchased?