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2 years ago

Which of the following are the coordinates of the vertex of y = x2 + 12x − 9?

Mathematics

1 answer:

irga5000 [103]2 years ago

5 0

The vertex is (12,-9). Hope this helps.

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*WILL GIVEE BRAINLIEST FOR THE BEST ANSWER* Which of the following is NOT a biased sample?

Dafna1 [17]

Answer:

Step-by-step explanation:

All other options are more biased

In B, the official wants to use 50 people from a library to represent the entire town's opinion on the library itself.... that's biased.

In C, it's the same. Of course basketball players would like to watch basketball.... right?? That's why the choice is biased.

In D, the location is a deli.... and from experience people order meat at a deli... cuz why else go there?

8 0

3 years ago

In ΔKLM, l = 820 cm, m = 560 cm and ∠K=169°. Find the length of k, to the nearest centimeter.

Darya [45]

Answer:

1374

Step-by-step explanation:k=

1887526.40528 ≈1373.873≈1374

6 0

3 years ago

Read 2 more answers

( a + b ) ^ 2 = bao nhiêu

FromTheMoon [43]

Answer:

a square plus 2ab plus b square......hope this will help you...thank you

5 0

3 years ago

Read 2 more answers

Round each number to the nearest 10 and 100. 734,102,483

11111nata11111 [884]

734: 730 and 700.

102: 100 and 100.

483: 480 and 500.

There you go! ^w^

8 0

2 years ago

What is the value of y in this system of equations: 3x + y = 9 y = –4x + 10 ?

Ahat [919]

3x + y = 9 (I)
y = –4x + 10 (II)
------------------------
 $\left \{ {{3x + y = 9 } \atop {y = -4x + 10 }} \right.$

Pass the incognito "4x" to the first term, changing the signal when changing sides.
-------------------------
simplify by (-1)
 $\left \{ {{3x + y = 9.(-1)} \atop {4x + y = 10 }} \right.$ 

-------------------------
 $\left \{ {{- 3x - \diagup\!\!\!\!y =-9} \atop {4x + \diagup\!\!\!\!y = 10}} \right. 
$

-------------------------
 $\left \{ {{- 3x = - 9} \atop {4x = 10}} \right.$ 

-----------
 $\boxed{x = 1}$ 

Substitute in equation (I) to find the value of "Y".

3x + y = 9 (I)
3*(1) + y = 9
3 + y = 9
y = 9 - 3
$\boxed{y = 6}$

Answer:
$\boxed{\boxed{ \left \ {{x=1} \atop {y=6}} \right. }}$

6 0

3 years ago