Mark's dad is three times older than Mark. Mark's sister is 2 years younger than Mark. (3m) The sum of their ages is 48. How old are Mark, his sister, and his dad?

Age of Mark years

Age of Mark's dad years

Age of Mark's sister years

Step-by-step explanation:

Let age of Mark be years.

Mark's dad is three times older than Mark

Age of her Mark's dad

Mark's sister is 2 years younger than Mark

Age of Mark's sister years

The sum of their ages is 48.

Age of Mark years

Age of Mark's dad years

Age of Mark's sister years

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

47 - 90 = 43

43 - 180 = x

x = 137