Evaluate the following expression when x = -2 y = 3 z = - 4

x=-4

y= 2

z= -4/3

Step-by-step explanation:

x= -4 (directly)

-2y = -4

or, y = -4/-2

y =2

3z= -4

z= -4/3

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

the diameter is 16 cm. are you a teacher?

step-by-step explanation: