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ch4aika [34]
3 years ago
14

Someone please help a) Solve the problem correctly by completing the square.

Mathematics
2 answers:
jolli1 [7]3 years ago
5 0

Answer:

X=4/7

Step-by-step explanation:

Firlakuza [10]3 years ago
4 0

Answer:

Step-by-step explanation:

x^2-4/7x-12/49=0

x= 6/7 and -2/7

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Cual es la expresion decimal de - 18/3
lisabon 2012 [21]

Answer:

6

Step-by-step explanation:

You need to divide it.Then you get 18 divided by 3.Which is 6

3 0
3 years ago
How many solutions does the following equation have? <br>-2z+10+7z=16z+7​
BARSIC [14]
Make all a and constant number in different side
10-7=16z-7z+2z
3=11z
z=3/11
7 0
3 years ago
Read 2 more answers
A paint company mixes it's paint with water to create more paint per gallon. They currently have ten gallon jugs which contain 1
Karo-lina-s [1.5K]
<h3>Answer:  1.25 gallons</h3>

==================================

Explanation:

They currently have ten gallon jugs that contain 10% water, so this means 0.10*10 = 1 gallon of the jug is water and the other 10-1 = 9 gallons is paint. This is assuming the cans are just paint and water.

The ratio of paint to water is 90:10 which reduces to 9:1

Often it helps to reduce as much as possible, but it's actually more handy in this case to keep it at 90:10 so you can see the two parts add back up to 100%

--------------

Let x be the amount of water we add. This amount is in gallons.

We start off with 1 gallon of water and it bumps up to 1+x gallons of water.

The overall amount of 10 gallons also bumps up to 10+x gallons.

We want a ratio of 80:20 this time, so we want 20 parts water and 80 parts paint. In other words, we want 20/(20+80) = 20/100 = 20% water

Divide (1+x) over (10+x) to get (1+x)/(10+x). This represents the fraction of water. We want this fraction to be equal to 0.20, which is the 20% water amount. It is also equal to 20/100.

--------------

(1+x)/(10+x) = 20/100

100(1+x) = 20(10+x) ... cross multiply

100+100x = 200+20x ... distribute

100x-20x = 200-100

80x = 100

x = 100/80 ... divide both sides by 80

x = 1.25

You need to add 1.25 gallons of water

--------------

If you add 1.25 gallons of water, then,

amount of water = 1+x = 1+1.25 = 2.25

amount of paint&water = 10+x = 10+1.25 = 11.25

So you'll have 2.25 gallons of water out of 11.25 gallons of water&paint mix

2.25/11.25 = 0.2 = 20% water

This confirms our answer.

--------------

Extra info:

1.25 gallons = 1 gallon + 1/4 gallon

1.25 gallons = 1 gallon + 1 quart

This is because 1 gallon = 4 quarts, so 1 quart = 1/4 gallon.

5 0
3 years ago
Aggregating prospective buyers into groups that have common needs and will respond similarly to a marketing action is referred t
Elena-2011 [213]

Answer: Market segmentation

Step-by-step explanation:

Market segmentation involves dividing people based on their consumption behavior and grouping those with similar consumption behavior together . Market segmentation helps to boost sales , increase profit and enables the business attend to the customers in a better way .

5 0
3 years ago
Read 2 more answers
If you ride your bike 12 miles per hour, how long would it take<br> you to travel 72 miles ?
poizon [28]

Answer:

It would take 6 hours for you to travel 72 miles.

Step-by-step explanation:

This question can be solved by a simple rule of three.

We have that:

Each hour, you ride 12 miles.

How many hours will take for you to travel 72 miles?

So:

1 hour - 12 miles

x hours - 72 miles

12x = 72

x = 72/12

x = 6

It would take 6 hours for you to travel 72 miles.

4 0
3 years ago
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