When writing the equation keep in mind that 7 + x is said as a term that is squared so it has to be squared while it's still together; (7 + x)².
B is the answer. PLEASE MARK AS BRAINLIEST!!!
Answer:
a = 4
b = 4
Step-by-step explanation:
This is a special right triangle with angle measures of 45° 45° 90° and side lengths x x x√2
The max of Lauren's age --> the minimum of the others' ages, 1, 2 & 3
4*avg = 4*9 = 36
36 - (1+2+3) = 30
Lauren is 30 yrs of age, or younger.
The formula for the triangular sequence is Xn=n(n+1)/2
So X25=25(25+1)/2=325
