Which equation has no real solutions? ) ​​−2​x2=−168

) 4​x2+ 76 = 32

) 25​x2= 1

) 43 −​x2= 12

Step-by-step explanation:

4x² + 76 = 32

4x² = -44

x² = -11

but x² must be non-negative, so there is no real solution.

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