Solve the system using elimination

-4x-9y=-22

-x+y=14

Twenty-five lamps are placed around a circle-shaped garden. How many straight lines could be found if each lamp is connected to all the rest?

Yesterday, Bethany sent 60 messages. She said that 15% of those messages were to her best friend. How many text messages did Bethany send to her friend yesterday

List from least to greatest 4.1, 0.25, 0.042, 2.21

A 3.8 kg object is lifted 12 meters. Approximately how much work is performed during the lifting? A. 45.6 J B. 372.4 J C. 588 J D. 446.9 J

What is the inequality symbol for 9.6 and square root of 96

A certain disease has an incidence rate of 0.2%. If the false negative rate is 8% and the false positive rate is 4%, compute the probability that a person who tests positive actually has the disease.

How many 4-element subsets containing the letter a can be formed from the set {a, b, c, d, e, f, g}?

A safety inspector conducts air quality tests on a randomly selected group of 7 classrooms at an elementary school. Identify the population and sample in this setting.

A square has an area of 15in^2. what is the approximate side lengths of the card

In class, we used associative property to show that when 6 is a factor, then 2 and 3 are factors, because 6=2x3. Use the fact that 10=5x2 to show that 2 and 5 are factors of 70, 80, and 90.