Solve using substitution.

x - 7y = 13

x + 4y = 2

If it snows tomorrow, the probability is 0.9 that John will practice his trombone. If it does not snow tomorrow, there is on a 0.5 chance that John will practice. Suppose the chance of snow tomorrow is 50%.

Doug bought 8 new country songs and 4 new rock songs for his music player. If his player randomly selects one of the new songs Doug just bought to play, what is the probability it will be a rock song? A. 1/2 B. 1/4 C. 1/12 D. 1/3

At a fourth of july barbecue, mr. adams cooked 3 times as many cheeseburgers as hamburgers. if he cooked a total of 72 burgers, how many of each did he make?

You are playing a dice game called Noluz against one other person. Each time you play, both players pay a quarter. You win the money if a 1 or 4 shows face up on the die.

Make a conjecture about the product of a nonzero rational number and an irrational number

How many numbers between 1-100 are equal to four times an odd number?

A graph shows the relationship between the height of a plant and the number of days. On which axis should the height of the plant be plotted? x-axis y-axis

Shirts are on sale at a price of $50 for 4. How many shirts can be purchased for $125?

What's 125,210,000 written in word form

Samantha saw two bottles of ketchup at the store. One bottle contained 4 pints while the other contained 1.25 quarts of ketchup. Which one was the better bargain