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AURORKA [14]
3 years ago
6

4x + y = 3-x + 2y = -3I need to use substitution to solve this. help?​

Mathematics
2 answers:
lisov135 [29]3 years ago
7 0

Answer:

Step-by-step explanation:

IrinaK [193]3 years ago
4 0

Answer:

(x,y) (1,-1)

Step-by-step explanation:

y=3-4x

-x+2y=-3

x+2(3-4x)=-3

x=1

y=3-4*1

y=-1

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In circle O, BC = 17 and DC = 30. The diagram is not drawn to scale.
Aliun [14]

Applying the secant-tangent theorem, the length of diameter, BA is: A. 52.9.

<h3>What is the Secant-Tangent Theorem?</h3>

Considering the image given, the secant-tangent theorem states that:

DC² = (BC)(BA)

Given the following:

  • BC = 17
  • DC = 30

Substitute the values into the equation

30² = (17)(BA)

900/17 = BA

BA ≈ 52.9

Length of the diameter, BA is: A. 52.9

Learn more about the secant-tangent theorem on:

brainly.com/question/10732273

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8 0
2 years ago
Proof by mathematical induction
Ghella [55]

Answer:

See below.

Step-by-step explanation:

I will assume that 3n is the last term.

First let  n = k, then:

Sum ( k terms) =  7k^2 + 3k

Now, the sum of k+1 terms  = 7k^2 + 3k + (k+1) th term

=  7k^2 + 3k + 14(k + 1) - 4

=   7k^2 + 17k + 10

Now 7(k + 1)^2 = 7k^2 +14 k + 7 so

7k^2 + 17k + 10

=  7(k + 1)^2  + 3k  + 3

= 7(k + 1)^2 + 3(k + 1)

Which is the  formula for the Sum of k terms with the k replaced by k + 1.

Therefore we can say if the sum formula is true for k terms then it is also true for (k + 1) terms.

But the formula is true for 1 term because  7(1)^2 + 3(1) = 10 .

So it must also be true for all subsequent( 2,3 etc) terms.

This completes the proof.

5 0
3 years ago
Please help. Part 2: What is the correct standard form of the equation of the parabola?
Anastaziya [24]

Answer:

The answer is (X +2)^2 = 4(Y -5).

6 0
3 years ago
Solve the inequality 1/4m≤−17 .
Anuta_ua [19.1K]

Answer:

M\leq -68

Step-by-step explanation:

This inequality is quite simple to solve.

Just multiply both sides by four and you have your answer:

4*(1/4m)\leq4*-17

m\leq -68

Hope this helps!

8 0
2 years ago
Write the equation of the line with the given slope and y-intercept. slope = 1 y-intercept = -3 4 A) y = x - 3/ 4 B) x = y - 3 /
Komok [63]

Answer:

y=x-3/4

Step-by-step explanation:

y-int is b (y=mx+b) so the slope is m. all u have to do is plug in

4 0
3 years ago
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