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3 years ago

Im so confused ples help ;-;

Mathematics

2 answers:

AleksandrR [38]3 years ago

4 0

Answer:

Step-by-step explanation:

vitfil [10]3 years ago

3 0

Answer: 18.85

Step-by-step explanation: You are just trying to find the circumference of the circle, as that would be what the track is. You first must convert the diameter to radius, as that is what the circumference (circumference is just a fancy word for perimeter) equation requires. Diamater is just a line that goes through the circle, while the radius is a line that goes to the middle of the circle, so you just half to divide by 2 to discover the radius is 3.

You then must plug this value into the circumference equation, which is C = 2πr.

C=2π3

C=18.85 is the circumference, rounded to the nearest hundredth.

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I am a 3-digit number. If you switch my first and last digits, I decrease by 297. Also, my

malfutka [58]

Answer:

Step-by-step explanation:

Let the 3-digit number is abc = 100a + 10b + c.

We have:

100a + 10b + c - 100c - 10b - a = 297
b = a - 6
a = 2c - 2

Simplify the first equation:

99a - 99c = 297
a - c = 3
a = c + 3

Solve for c by substitution:

2c - 2 = c + 3
2c - c = 3 + 2
c = 5

Find a:

a = 3 + 5 = 8

Find b:

b = 8 - 2 = 6

The number is:

3 0

2 years ago

Given graph a above,what is the value of f(-2)?

WITCHER [35]

Answer:

y=3

Step-by-step explanation:

F(x)=f(-2) so go to -2 on the x axis and then find the y

4 0

3 years ago

Please help with this ??

timofeeve [1]

Answer:

Step-by-step explanation:

3 0

3 years ago

Suppose that the scores on a reading ability test are normally distributed with a mean of and a standard deviation of . What pro

Gnoma [55]

Answer:

The proportion of individuals score at most 74 points on this test is 70%.

Step-by-step explanation:

The complete question is:

Suppose that the scores on a reading ability test are normally distributed with a mean of 70 and a standard deviation of 8. What proportion of individuals score at most 74 points on this test? Round your answer to at least four decimal places.

Solution:

Let X represent the scores on a reading ability test.

It is provided that $X\sim N(70,8^{2})$ .