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Rufina [12.5K]
3 years ago
5

Help me i need the help so much

Mathematics
2 answers:
Setler [38]3 years ago
5 0
Alessandro got home first. I think.
Anit [1.1K]3 years ago
3 0

Answer:

Allesandro got home first because the fraction isn't a whole and it's comparing Allesandro's time.

Step-by-step explanation:

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Solve 5x-y=5 and 2y-x^2=11 without using trial improvement
iren2701 [21]

Answer:

x = 7, y = 30  and  x = 3, y = 10

Step-by-step explanation:

5x - y = 5, then y = 5x - 5

2y - x^2 = 11

2(5x - 5) - x^2 = 11

10x - 10 - x^2 = 11

-x^2 + 10x -10 = 11

-x^2 + 10x -21 = 0

x^2 - 10x + 21 = 0

(x - 7)(x - 3) = 0

x = 7, y = 30

x = 3, y = 10

8 0
3 years ago
Find the area of an equailateral triangle with a 9 in perimeter
olchik [2.2K]

Answer:

The answer is 3.9

Step-by-step explanation:

8 0
3 years ago
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How you would convert the repeating, nonterminating decimal to a fraction? Please EXPLAIN the process as you solve the problem,
zmey [24]
Okay, here we go.

With simpler decimals, this is a bit easier so I'll explain that first to make sure you get the basic idea. 

Let's say you had a decimal for .75 and wanted to create the fraction mathematically. To do this you would:

First divide the decimal by 1 so .75/1
Then multiply be a multiple of 10 that eliminates the decimal so in this case 100
so you now have 75/100
When you simplify that fraction by dividing by 25, you of course get 3/4

Now on to your more complicated question:

Let's assign a variable to your repeating decimal so:

x=.1515151515

Now, let's identify the repeating digits, here they are .15

Move one set of the repeating digits in front of the decimal  so now we get:

100x=15.1515151515

Now you have two equations, they are:

x=.1515151515
100x=15.1515151515

Combine the equations into one equation:

100x-x=15.1515151515-.1515151515
99x=15
15/99
simplify and you get 5/33





6 0
3 years ago
Evaluate the expression when x=−3 <br> xˆ2+5x+9
gulaghasi [49]
When -3 is squared it becomes 9 then -3x5 is -15 so put that back into the equation 9-15+9= 4
7 0
3 years ago
Read 2 more answers
The wall in the family room is exactly 12 feet long. Your couch is 10 feet and 6 inches long. Once the couch is placed, how much
Alex17521 [72]
18 inches, 10 feet times 12 inches is 120 + 6 inches is 126 inches - 144 inches which is 12 inches times 12 inches, 144 - 126 inches is 18 inches.
4 0
4 years ago
Read 2 more answers
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