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ivanzaharov [21]
3 years ago
10

A small school employs 5 teachers who make between $40,000,and 70,000 per year.

Mathematics
1 answer:
Soloha48 [4]3 years ago
3 0

Answer:

Its B

Step-by-step explanation:

No of teachers in the school = 5

Salaries they make =40000 to 70000

When one of the five teachers reduce salary to 20000/- per year, median may or may not shift one number to the left

Mean will definitely decrease by difference/5 = 4000 dollars

Thus mean will defintely change by reduction of 4000 dollars.

Median has a chance to remain the same or may shift left side one item.

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Guysssss I'm struggling in mathh :( I need help
Sedaia [141]

Answer:

The first two is x=60

Step-by-step explanation:

1.5/90 = 1/x

1.5x = 90 x 1

1.5x/1.5 = 90/1.5

x = 60

5 0
4 years ago
Read 2 more answers
Solve the system of equations below.<br> x + y = 5<br> -4x – 2y = -8
mel-nik [20]

Answer:

x = -1 , y = 6  

or  (-1, 6)

Step-by-step explanation:

First solve for "y" in the second equation:

-4x-2y=-8\\-4x+8=2y\\y=-2x+4

and now, use this result as a substitution for "y" in  terms of "x" in the first equation:

x+y=5\\x+(-2x+4)=5\\x-2x+4=5\\-x=5-4\\-x=1\\x=-1

Knowing the value of "x", now we place it in the substitution equation to find "y":

y=-2x+4\\y=-2(-1)+4\\y=6\\

6 0
3 years ago
Please help! I have no idea how to do this, it’s very confusing
Vsevolod [243]
I like that you left How you did it on there. When I was in school I did it the same way. I would assume you’re using is over of equals percent over 100. The problem however is that the above number is always the total which means it should be on the bottom.

X/72= 45/100. Similar to what you have written. Solve the proportion. 100x=72x45
100x= 3240
X = 32.4
3 0
3 years ago
Factor 15x-10x^3<br><br> PLEASE ASNWER ASAP
sdas [7]

Answer:

\huge\boxed{\sf 5x(3-2x^2)}

Step-by-step explanation:

\sf 15x-10x^3\\\\Greatest Common Factor = 5x\\\\So, We'll \ take \ 5x \ common\\\\= 5x ( 3-2x^2)\\\\Thus, this \ is \ the \ factorized\ form\\\\\rule[225]{225}{2}

Hope this helped!

<h3>~AnonymousHelper1807</h3>
3 0
3 years ago
The hyperbola is used as a mathematical model in which of the following areas?
Anna11 [10]

Answer:

Engineering

Step-by-step explanation:

Start by eliminating illogical choices:  dentistry, business, literature.

That leaves science and engineering.

Designs of suspension bridges usually include half parabolas or half hyperbolas, which indicates that engingeering is the logical choice here.

Science is discovery and understanding of the natural, physical world, whereras engineering is the application of knowledge and tools, of which space curves (such as hyperbolas) are one.

6 0
4 years ago
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