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3 years ago

Plz, answer this question plz!

Mathematics

2 answers:

o-na [289]3 years ago

4 0

Answer:

Step-by-step explanation:

I think the answer is c

Dominik [7]3 years ago

3 0

Actual Answer:

A (I THINK )

Answer:

There is a hack in forms that forms gives u the answer hold ctrl + u, and scrool to the bottom he read the part with the question and there will be an answer.

Mark as brainliest if im right good luck!!

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The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +

lianna [129]

You have a system of equations $\left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right.$ .

1. Substitude right side of second equation into the left side of the first equation: $-6x+6=-x^2+2x-9$ .

2. Solve this equation:
$x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4, \\ \sqrt{D}=2, \\ x_{1,2}=\dfrac{8\pm 2}{2 } =3,5$ .

3. Find y:
for $x_1=3, y_1=-6\cdot 3+6=-18+6=-12$ ,
for $x_2=5, y_2=-6\cdot 5+6=-30+6=-24$ .

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.

7 0

3 years ago

Read 2 more answers

A board 6 ft 11 in long is cut from a board 10 ft 5 in long. Find the length of the remaining

gulaghasi [49]

Answer:

3' 6" left

Step-by-step explanation:

6' 11" = 83"

10' 5" = 125"

125 - 83 = 42"

42" = 3' 6"

4 0

2 years ago

100 students are interviewed to see which of biology, chemistry or physics they prefer.

Sedbober [7]

65.45%

Mark brainliest please

Hope this helps you

6 0

2 years ago

Please help with the picture below.

Nesterboy [21]

They would both be 52°
explanation: they are complementary angles, meaning they are the same. since a line adds up to 180°, take 128° away from 180° and you get 52°

3 0

2 years ago

Find 20% of 150 <br><br> A. 20<br> B. 130<br> C. 120<br> D. 30

Ivan

<h3>Calculate percentage of a number</h3>

For this, multiply 150 × .20 = 30

Therefore, 20% of 150 is 30.

So, the correct option is "D".

See about percentages at: brainly.com/question/24209747

5 0

2 years ago