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coldgirl [10]
4 years ago
9

HELP WILL GIVE BRAINLIEST! RATE AND SAY THANKS!!

Mathematics
1 answer:
garri49 [273]4 years ago
5 0

Step-by-step explanation:

Density  \: of \:  pyramid  \\  \\  =  \frac{mass}{volume}  \\  \\  =  \frac{50}{4 \times 8 \times 10}  \\  \\  =  \frac{5}{32}  \\  \\  = 0.15625 \: gm \:  {cm}^{ - 3}  \\  \\  \approx \: 0.156 \: gm \:  {cm}^{ - 3}  \\

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How to find the inverse of h(x) = 3/ -x - 2 List steps.
PtichkaEL [24]
To find the inverse,

First, you would have to switch the domain and range. In other words, swap x and y:

h(x) = 3/ -x-2
y = 3/ -x-2
x = 3/ -y-2

Then, when you have this, simply solve for y:

x = 3/-y-2
x (-y-2) = 3/-y-2 (-y-2)
x(-y-2) /x= 3 /x
-y-2 = 3/x
-y = 3/x + 2
 y = -3/x -2

So the inverse would be
 h⁻¹(x)= -3/x -2
7 0
4 years ago
PLEASE HELP!!
viktelen [127]

Answer:

C. The principal randomly selects homeroom classes and surveys each student in the chosen classes.

Step-by-step explanation:

Middle school is 6-8th. Surveying only the eighth-grade students won't give a representative sample of the whole school only the eighth-graders. Option A is incorrect.

Surveying only the students in detention represents a very small amount of students compared to the school, therefore it is not a representative sample. Option B is incorrect.

Yet again, the students in the math club is a small amount of students compared to the school. It does not represent the entire, or majority of the population. Option D is incorrect.

Picking students from homeroom classes and surveying each will give a wider variation of opinions from each grade and therefore a representative sample. Option C is the correct answer.

4 0
2 years ago
Jeremy's score was 1.75 standard deviations above the mean. which kf thr following is closest to his percentile rank
Gelneren [198K]
The answer is 96%.

Explanation:
It is generally presumed that the scores are normally distributed.

1) You are given how many standard deviations from the mean Jeremy's score is. This is exactly the definition of the z-score. Therefore z = 1.75

2) Look at a left-tail z-table in order to find the area of the normal curve on the left of your z-score (see picture attached). A = 0.9599

3) Multiply the area by 100 in order to find the percentile:
<span>0.9599 </span>× 100 = 95.99
Therefore, 95.99% of the students scored less than Jeremy.

Hence, the answer is 96%.

4 0
4 years ago
What is the value of x in the isosceles trapezoid below?
Tom [10]

The answer is 10. Apex :)

7 0
4 years ago
Read 2 more answers
PLEASE ANSWER I NEED HELP!!..
nikitadnepr [17]
Please don't post masses of questions all at once.  1-2 problems per post would be more realistic and fairer to others who need help.

Regarding   <span>x-2/5 = 1/5

We are to solve for x.   To do this, let's remove the fractions by mult. all 3 terms by 5.  Then 5x - 2 = 1, or 5x = 3.

Dividing both sides by x, we get x = 3/5 (answer).  Check this by subst. 3/5 into the original equation.</span>
5 0
3 years ago
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