How do i solve? the johnson twins were born seven years after their older sister. this year, the product of the three siblings' ages is exactly 2138 more than the sum of their ages. how old are the twins?

The twins are 11 years each and their older sister is 18 years.

Step-by-step explanation:

Let represent the age of one of the boys as x and that of the older sister as y.

The boys were born 7 years after their older sister can be represented as

Y = x + 7

This year, the product of the three siblings' ages is exactly 2138 more than the sum of their ages.

This can be represented as; x × x × y= 2138 + x + x + y

X^2 × y = 2138 + 2x + y….......(eqn 1)

Recall that Y = x + 7

Subs Y into eqn 1

X^2( x+7) = 2138 + 2x + x+7

X^3 +7x^2 - 3x - 2145 = 0

Solving this polynomial

X= 11 and y = 18.

The ages of the twins are 11 years each

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.