anna130 anna130

21-08-2017
Mathematics

contestada

if the average (arithmetic mean) of two, seven, and X is 12, what is the value of X?

Respuesta :

kphung76127 kphung76127

21-08-2017

The average is always the sum of values divided by the number of values.

(2+7+x)/3=12

Multiply both sides by 3
2+7+x=36

Combine like terms
9+x=36

Subtract 9 from both sides
x=27

Final answer: x=27

Answer Link

Otras preguntas

Simply 15 to the 18 power divide by 15 to the 3 power

Why the arrhenius model of acids and base does not include ammonia in a solution as a base?

The table shows the height of a flower as it grows. What equation in slope-intercept form gives the flower's height at any time? Time (weeks) Height (inche

How do I determine a population deviation with literally only a percentage??? The question is phrased like this... Suppose that 44% of all Americans approve of

A mixture that appears to contain only one substance is a(n) A) always a compound B) heterogeneous mixture C) homogeneous mixture D) always an element

Jeremy can type 144 words in 4 minutes . how many words can he type in 10 minutes at the same rate? plz answer

Expand the binomial (2x + y^2)^5. The fourth term in the expansion of the binomial (2x + y^2)^5 is _____

Abcd is a square. given only the choices below, which properties would you use to prove aeb ≅ dec by asa?

If the initial concentration of ab is 0.290 m , and the reaction mixture initially contains no products, what are the concentrations of a and b after 80 s ?

TRUE OR FALSE: Bread Mould is a saprophyte.