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3 years ago

Write and solve an inequality to represent the situation.

Mathematics

1 answer:

True [87]3 years ago

8 0

Answer:

x ≥ 25/9

Step-by-step explanation:

7x + 6 ≥ 31 - 2x

7x ≥ 25 - 2x

9x ≥ 25

x ≥ 25/9

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If you are looking for the height of a pyramid and the volume is 18,069,333.33333 and the length and width are both 440 what is

makkiz [27]

Answer:

h=123,200

Step-by-step explanation:

First you must in the formula for the pyramid, which is

$v=\frac{wlh}{3}$

and as far as the question has gave us

V=18069333.33333

LW=440

1.) Plug those numbers into the the equation, which should be:

$(18,069,333.33333)= \frac{(440)h}{3}$

2.) Then isolate the "h" by dividing both sides by $\frac{440}{3}$ , or multiplying its reciprocal, which is $\frac{3}{440}$

$(\frac{3}{440}) 18,069,333.33333=\frac{440h}{3} (\frac{3}{440} )$

3.) Simplify or round the numbers if you need to.

$h= 123,200$

5 0

2 years ago

Is y=4 a function, a relation, or is it both?

Maurinko [17]

Answer:

Function

Step-by-step explanation:

The reason it is a function is because its saying y=x. Then you just plug in the number(s) to get the function y=4.PLEASE MARK BRAINLIEST thank you!!!!!!!!!

3 0

2 years ago

1.44 Make-up exam: In a class of 28 students, 27 of them took an exam in class and 1 student took a make-up exam the following d

Olenka [21]

Answer:

a) Decrease

b) New mean = 78.43

c) Decrease

Step-by-step explanation:

We are given the following in the question:

Total number of students in class = 28

Average of 27 students = 79

Standard Deviation of 27 students = 6.5

New student's score = 63

a) The new student's score will decrease the average.

b) New mean

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean = \dfrac{\displaystyle\sum x_i}{27} = 79\\\\\sum x_i = 27\times 79 = 2133$

New mean =

$\text{ New mean} =\dfrac{ \displaystyle\sum x_i +63}{28}\\\\ =\dfrac{2133+63}{28}= \dfrac{2196}{28} = 78.43$

Thus, the new mean is 78.43

c) Since the new mean decreases, standard deviation for new scores will decrease.

This is because the new value is within the usual values i.e. within two standard deviations of the mean. So, this wont cause a lot of variation as this value will be closer to already available data values. Also number of observations (n) in the denominator is increasing. Based on both these points we can conclude that standard deviation will decrease

Formula for Standard Deviation:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}}$