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3 years ago

For each pair solve of simultaneous equations solve for x and y x+y=13 and 8x-5y=0

Mathematics

1 answer:

vovangra [49]3 years ago

8 0

Answer:

x=5 y=8

Step-by-step explanation:

here's your answer. Please mark as brainliest

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Complete the square for x^2+12x-5.

Setler [38]

Answer:

$x^2+12x-5=(x+6)^2-41$

Step-by-step explanation:

The given expression is $x^2+12x-5$

Comparing to $ax^2+bx+c$ , we have $a=1,b=12,c=-5$

We add and subtract $(\frac{b}{2a})^2$

$x^2+12x+6^2-6^2-5$

This implies that:

$\boxed{x^2+6x+36}-36-5$

The expression in the rectangle is a perfect square

$(x+6)^2-41$

Therefore $x^2+12x-5=(x+6)^2-41$

3 0

3 years ago

| 1. Add the polynomials.<br> (-14x2 + 6x – 5) + (x3 + 2x2 + 5)

docker41 [41]

Answer:

So I'm not completely sure what the x is standing for in this. Is it standing at a multiplication sign like -14 TIMES 2? Or is it -14x TIMES 2?

Step-by-step explanation:

7 0

3 years ago

What is the solution of the inequality<br> -6x-17greater or equal to 8x+25

Masja [62]

-6x -17 ≥ 8x + 25

Subtract 8x from each side:

-14x -17 ≥ 25

Add 17 to each side:

-14x ≥ 42

Divide each side by 14 :

-x ≥ 3

Change the signs. (Multiply each side by -1.)
That's when you have to flip the inequality symbol.

x ≤ -3

6 0

3 years ago

Read 2 more answers

Please check screenshot

nignag [31]

Answer:

Step-by-step explanation:

6 0

3 years ago

Help please worth 30

Rasek [7]

Answer:

A) AA postulate; 18

Step-by-step explanation:

Due to the similar triangles, we can set up the proportion and solve for x

8/(8+4) = 12/x

8/12 = 12/x

8*x = 12*12 ... cross multiply

8x = 144

x = 144/8

x = 18

7 0

3 years ago