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ANEK [815]
3 years ago
13

PLEASE HELP I WILL GIVE 100 POINTS AND BRAINLIEST!

Mathematics
2 answers:
Vladimir79 [104]3 years ago
7 0

See attached picture.

marta [7]3 years ago
6 0

Answer:

x=1

Step-by-step explanation:

I will solve your system by substitution.

(You can also solve this system by elimination.)

3x−2y=1;2x+2y=4

Step: Solve3x−2y=1for x:

3x−2y+2y=1+2y (Add 2y to both sides)

3x=2y+1

x 3 = 2y+1 3  (Divide both sides by 3)

x= 2 3 y+ 1 3

Step: Substitute  2 3 y+ 1 3 for xin 2x+2y=4:

2x+2y=4

2( 2 3 y+ 1 3 )+2y=4

10 3 y+ 23 =4 (Simplify both sides of the equation)

10 3 y+ 2 3 + −2 3 =4+ −2 3  (Add (-2)/3 to both sides)

10 3 y= 10 3

10 3 y 10 3 = 10 3 10 3  (Divide both sides by 10/3)

Step: Substitute 1 for yin x= 2 3 y+ 1 3 :

x= 2 3 y+1 3

x= 2 3 (1)+ 1 3

x=1 (Simplify both sides of the equation)

That was a lot to type.

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Solve -1 < x + 1 ≤ 6
andrey2020 [161]

Answer:

-2<x≤5

Step-by-step :

-1<x+1≤6 So fisrt what every we do to one side we must do to the other. In this case it's a bit different since we are dealing with inequalities.

-1<x+1≤6 I would start off by isolating x in the middle.

-1<x+1≤6 I subtracted 1 from all three sides.

-1     -1   -1

Now your equation should look like this:

-2<x≤5  Now there is really nothing much we can do here since we were just trying to get x by its self.

Answer : -2<x≤5

7 0
3 years ago
Determine the factors of x2 − 7x − 10. (5 points) a (x + 2)(x − 5) b Prime c (x − 2)(x + 5) d (x + 10)(x − 1)
Savatey [412]

For this case we must factor the following expression:

x ^ 2-7x-10

To factor, we must find two numbers that when added together give -7 and when multiplied by -10.

It is observed that there are not two whole numbers that comply with the aforementioned.

Thus, the following equation applies:

x = \frac {-b \pm\sqrt{b ^ 2-4 (a) (c)}} {2 (a)}

Where:

a = 1\\b = -7\\c = -10

We replace:

x = \frac {- (- 7) \pm \sqrt {(- 7) ^ 2-4 (1) (- 10)}} {2 (1)}\\x = \frac {7 \pm \sqrt {49 + 40}} {2}\\x = \frac {7 \sqrt {89}} {2}

So, the roots are:

x_ {1} =\frac {7+ \sqrt {89}} {2}\\x_ {2} =\frac {7- \sqrt {89}} {2}

Answer:

x_ {1} =\frac {7+ \sqrt {89}} {2}\\x_ {2} =\frac {7- \sqrt {89}} {2}

6 0
3 years ago
Convert and round to the proper Precision or accuracy. 21.4 grams= mg? * O .0214 mg О 214 mg О 214.0 mg O 21,400 mg 00214 mg​
KengaRu [80]

Answer: 21,400 mg

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4 0
3 years ago
Given that a function, g, has a domain of -20 sxs 5 and a range of 5 s 39 s 45 and that g(0) = -2 and g(-9) = 6, select the stat
luda_lava [24]

Answer:

option (B) and (D)

Step-by-step explanation:

It's just basic of domain and range just check out the domain and range you can get your answer .

Only option (B) and (D) satisfy in the given range and domain

8 0
3 years ago
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Answer:

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Step-by-step explanation:

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