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hram777 [196]
3 years ago
13

-6x + 2y = 16 -4x + y = 9 Can someone show me how to solve the system?

Mathematics
1 answer:
sineoko [7]3 years ago
5 0

First you can either substitute or elimination.

So what I did was (2) -6x+2y=16  -------> -12x+4y=32

(-3) -4x+y=9 -------------------------------------> 12x-3y= -27

which would come to y=5 and if you put it back in both equations which would make x= -1

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Which number does NOT represent an integer? A. 3 B. 20.1 C. -10 D. 20/4​
guapka [62]

Answer:

the number doesnt represent an integer?

A. 3

B. 20.1

C. -10

D. 20/4​

Step-by-step explanation:

We call integers the “counting numbers, their negatives and zero”. I.e.  0,1,−1,2,−2,3,−3,.. etc.

non-integers means “everything except integers”. Which is not well-defined (i.e. nonsense). Why? Because nobody said what “everything” is.

Therefore, when somebody says “non-integer” he has to specify how he defines “everything”. In this case, our “everything” is probably “real numbers”.

Real numbers have an interesting definition concerning an abstract mathematical object called “field” . Let’s forget about that and let’s focus on a high school definition: Real numbers are probably all the numbers you know. They are those represented by a decimal and their negatives e.g.  345.232…  and  −243.13242240…  where there are “infinitely many” digits at the end. Note that  2.5  is also a real number. Integers are too. Basically, real numbers are the numbers used to measure distances and their negatives.

To summirize, your answer is the following:

“non integers” means everything except the integers, where everything is defined however we want. The most common definition of everything in this case is “real numbers” and therefore the most common interpretation of “non integers” is “reals which are not integers”.

Examples of “reals which are not integers”:  1.5,2.88,1.3333…  etc

the answer is

B. 20.1

6 0
3 years ago
The box plots show male and female grades in a biology class
stiks02 [169]

Answer:

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4 0
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Degger [83]
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8 0
3 years ago
Help please! 10 points!
IgorC [24]

Answer:

21.6 or 22

Step-by-step explanation:

Triangles have same angles. This means that they are proportion.

50/27 = 40/x

when you cross multiply to solve x, 50x = 1080

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7 0
3 years ago
A triangle has one angle measuring 3X degrees a second angle measures 2X +20°
Lena [83]
Answer : x = 20

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9x = 180

9x/9 = 180/9

X = 180 divided by 9

X = 20
7 0
3 years ago
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