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svetlana [45]
3 years ago
11

Needing help with some of my college summer HW

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
5 0

B. Half the speed of the car. and C. The number of different colors on the page.


Variables are symbols for unknown values, so you have to find the statements that contain an unknown value.


A. 27 ⇒ The point value is known, so there is no variable.

B. \frac{1}{2}X ⇒ Since the speed of the car is unknown, the variable X represents the speed of the car. This variable is multiplied by \frac{1}{2} or divided by 2 to get half the speed of the car.

C. X ⇒ The number of different colors is not known, so the variable X represents the number of different colors.

D. 80 ⇒ There is nothing unknown in the statement.


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If:<br> AC = 53,<br> BC=2x + 5, and<br> AB = 4x+ 6,<br> Find BC.
labwork [276]

Answer:

19

Step-by-step explanation:

I took one for the team

6 0
3 years ago
The heights of a certain type of tree are approximately normally distributed with a mean height p = 5 ft and a standard
arsen [322]

Answer:

A tree with a height of 6.2 ft is 3 standard deviations above the mean

Step-by-step explanation:

⇒ 1^s^t statement: A tree with a height of 5.4 ft is 1 standard deviation below the mean(FALSE)

an X value is found Z standard deviations from the mean mu if:

\frac{X-\mu}{\sigma} = Z

In this case we have:  \mu=5\ ft\sigma=0.4\ ft

We have four different values of X and we must calculate the Z-score for each

For X =5.4\ ft

Z=\frac{X-\mu}{\sigma}\\Z=\frac{5.4-5}{0.4}=1

Therefore, A tree with a height of 5.4 ft is 1 standard deviation above the mean.

⇒2^n^d statement:A tree with a height of 4.6 ft is 1 standard deviation above the mean. (FALSE)

For X =4.6 ft  

Z=\frac{X-\mu}{\sigma}\\Z=\frac{4.6-5}{0.4}=-1

Therefore, a tree with a height of 4.6 ft is 1 standard deviation below the mean .

⇒3^r^d statement:A tree with a height of 5.8 ft is 2.5 standard deviations above the mean (FALSE)

For X =5.8 ft

Z=\frac{X-\mu}{\sigma}\\Z=\frac{5.8-5}{0.4}=2

Therefore, a tree with a height of 5.8 ft is 2 standard deviation above the mean.

⇒4^t^h statement:A tree with a height of 6.2 ft is 3 standard deviations above the mean. (TRUE)

For X =6.2\ ft

Z=\frac{X-\mu}{\sigma}\\Z=\frac{6.2-5}{0.4}=3

Therefore, a tree with a height of 6.2 ft is 3 standard deviations above the mean.

6 0
3 years ago
Twice a number is 12 more than five times the number
inna [77]
N x 2 = 12 + 5n
2n - 5n = 12
-3n = 12
3n = -12
n = -4
4 0
3 years ago
Kailynn made 18 out of her last 70 free throw attempts. If she attempts 70 free throws this season, predict how many she will mi
zlopas [31]
Around 50 free throws she will miss
8 0
2 years ago
Which defines a circle a. Two days with a common endpoint b. A piece of a line with two endpoints c. A piece of a line with one
nordsb [41]

Answer:

The correct answer is d.

Step-by-step explanation:

Any point that is co planar with one another and is also equidistant from a given point is a circle. We need it to be co planar, otherwise it would be 3-dimensional and create a sphere. And if they we not all equidistant, they would not make an even circle (it'd be an oval or another shape).  

8 0
3 years ago
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