Kayla has a younger sister an a older brother. her younger sister is 3 years more than half of kayla's age. her older brother is 7 years less than twice kayla's age. if the sum of all three of their ages is 38 how old is kayla?

homozygous. one is homozygous, while two is heterozygous.

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