Mrs Moran random;y surveyed 20 of her students about their [ets. Her survey indicated that 8 students have a dog,9 students have a cat, 3 students have another kind f pet, and 5 students have no pet.(Note that some students have more than one pet). What is Mrs. Morans best estimate of the total number of her students who have a cat?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

Use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2 + 9 = −26 −3 − 7 = 13

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec