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Minchanka [31]
3 years ago
12

Describe how to find the sums -4 + 2 and -4 + ( -2 ) on a number line

Mathematics
1 answer:
ivolga24 [154]3 years ago
4 0

Answer:

For the first one, you go from -4 on the number line and move 2 spaces to the right to get -2. For the second one, you start at -4 again and then you move to the left 2 spaces since your subtracting.

Step-by-step explanation:

-viridiancat4, an 8th grader :)

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What is 4y-x+7+5y+3x-9
zimovet [89]

Answer:

2 x + 9 y − 2

Step-by-step explanation:

If you're just looking to simplify and/or combine like terms, here's your answer: 2 x + 9 y − 2

Glad I could help!!

4 0
3 years ago
The Office of Student Services at a large western state university maintains information on the study habits of its full-time st
ExtremeBDS [4]

There is a probability of 77% that the mean of this sample is between 19.25 hours and 21.0 hours

Z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma/\sqrt{n} } \\\\where\ x=raw\ score,\mu=mean,\sigma=standard\ deviation,n=sample\ size

Given that μ = 20, σ = 7, n = 125.

For x = 19.25:

z=\frac{19.25-20}{7/\sqrt{125} } =-1.20\\\\\\For\ x=21:\\\\z=\frac{21-20}{7/\sqrt{125} } =0.62

From the normal distribution table, P(-1.20 < z < 0.62) = P(z < 0.62) - P(z < -1.2) = 0.8849 - 0.1151 = 0.7698 = 77%

There is a probability of 77% that the mean of this sample is between 19.25 hours and 21.0 hours

Find out more on z score at: brainly.com/question/25638875

8 0
2 years ago
Math problem for highschool
tresset_1 [31]

Answer:

297 units squared

Step-by-step explanation:

You just have to break the squares down and compare them to the other sides of the squares.  For example, F is a 4 by 4 square and B is a 5 by 5 square, to find the dimensions of square E, you would just subtract 5 by 4.  By looking at the side relationships of the squares, you can easily find the dimensions of each one.

A - 9 by 9

B - 5 by 5

C - 6 by 6

D - 7 by 7

E - 1 by 1

F - 4 by 4

G - 8 by 8

H - 5 by 5

Multiply and add to get 297

7 0
2 years ago
Read 2 more answers
The speed of an object can be found by taking the distance it travels and dividing it by the time it takes to travel that distan
Alexus [3.1K]

Answer:

<h2>True the speed S in in Feet/second</h2>

Step-by-step explanation:

In this problem we are required to solve for the speed of an object.

given that the expression to solve for the speed is expressed as

speed= distance/time

given data

distance=100 feet

time=2.5 seconds

substituting our given data into the expression we can solve for speed as

speed (S)=100/2.5

S= 40feet/seconds

upon substituting our data the speed S was found to be 40feet/s

True the speed S in in Feet/second

4 0
3 years ago
You don't have to draw a line you can just type the volumes in terms of PI and just normal.
Nikolay [14]
Dill pickle 10.6^ units
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3 years ago
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