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3 years ago

Find the solution to the equations. 2х-у=-3 х+у=0 0,0 -1,1 1,-1

Mathematics

2 answers:

Lelechka [254]3 years ago

7 0

Answer:

Option B : ( - 1 , 1 ) ==> x = -1 , y = 1

Step-by-step explanation:

2x - y = - 3 -------- ( 1 )

x + y = 0 => x = - y -------( 2 )

Substitute ( 2 ) in ( 1 ) : 2x - y = - 3

2( - y ) - y = - 3

- 2y - y = - 3

- 3y = - 3

y = 1

Substitute y in ( 2) : x + y = 0

x + 1 = 0

x = - 1

kobusy [5.1K]3 years ago

3 0

It’s 0,0. The correct answer!

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Can someone please explain how i do this

lukranit [14]

Answer:

base: 4

exponent: 3

numerator: 1

denominator: 64

Step-by-step explanation:

4^4 * 4^-2: Here you subtract 2 from 4 (just basic rules)

so you get 4^2/4^5

4^2/4^5: you subtract 5 from 2 (also basic rules)

then you would get 4^-3

To put in positive exponents you do 1/4^3

which gets you 1/64

8 0

2 years ago

Read 2 more answers

Use mathematical induction to prove that for each integer n > 4,5" > 2^2n+1 + 100.

Flura [38]

Answer:

The inequality that you have is $5^{n}>2^{2n+1}+100,\,n>4$ . You can use mathematical induction as follows:

Step-by-step explanation:

For $n=5$ we have:

$5^{5}=3125$

$2^{(2(5)+1)}+100=2148$

Hence, we have that $5^{5}>2^{(2(5)+1)}+100.$

Now suppose that the inequality holds for $n=k$ and let's proof that the same holds for $n=k+1$ . In fact,

$5^{k+1}=5^{k}\cdot 5>(2^{2k+1}+100)\cdot 5.$

Where the last inequality holds by the induction hypothesis.Then,

$5^{k+1}>(2^{2k+1}+100)\cdot (4+1)$

$5^{k+1}>2^{2k+1}\cdot 4+100\cdot 4+2^{2k+1}+100$

$5^{k+1}>2^{2k+3}+100\cdot 4$

$5^{k+1}>2^{2(k+1)+1}+100$

Then, the inequality is True whenever $n>4$ .

3 0

3 years ago

BRAINLIEST!!! he dot plot shows predictions for the winning time in the 200-meter sprint. The winner finished the race in 22.2

Alenkasestr [34]

Answer: Approximately 3.15%

Explanation:

The true finishing time is 22.2 seconds. The prediction furthest from this is 22.9 seconds. This is a difference of 22.9-22.2 = 0.7 seconds. Divide this over the true time value to get (0.7)/(22.2) = 0.03153 which is approximate.

Move the decimal point to the right 2 spots to get to 3.153%; round this value however you need to.

7 0

3 years ago

Find the measure of angle c

Vlad [161]

Answer:

Roughly 70.29 degrees

Step-by-step explanation:

Equation:

(2x+27)+(2x-11)+3x = 180

7x + 16 = 180

7x = 164

x ~ 23.43

Angle C:

3（23.43)

70.29

4 0

3 years ago

What is the answer to (8x-44)

kodGreya [7K]

Are you solving for x or what

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3 years ago