Jamal went to the post office to buy stamps and large envelopes. Each stamp costs the same amount, and each envelope costs the same amount. -The first customer paid $13.25 for 14 stamps and 5 large envelopes. -The second customer paid $23.75 for 10 stamps and 15 large envelopes. What was the cost in dollars of each large envelope? A. $1.25 B. $0.50 C. $1.58 D. $0.95

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

What is the lcm of 16 and 40 ? 24 and 40 ?

Is the figure congruent? yes or no?