The first week at javier's new job he spent $12.48, $9.50, $10.25, $4.99, and $8.59 on lunch.
in the second week, he spent $3 more in total for the 5 lunches than the first week.
what is the increase in the mean for the second week compared to the first?

Mean for 2nd week increased by 6.51 % or by  0.6 value compared to the 1st week.

Step-by-step explanation:

Money spend in 1st week = 12.48 , 9.50 , 10.25 , 4.99 , 8.59

Total Money Spend in 1st week = 12.78 + 9.50 + 10.25 + 4.99 + 8.59 = $ 46.11

In 2nd week he spend $3 more.

So total Money Spend in 2nd week = 46.11 + 3 = $ 49.11

Mean of 1st week =

Mean of 2nd week =

So, increase in mean from 1st week = %

Therefore, Mean for 2nd week increased by 6.51 % or by  0.6 value compared to the 1st week.

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true

b. f(x) = –√x + 3this is the correct answer