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2 years ago

Will mark first answer brainliest

Mathematics

2 answers:

babymother [125]2 years ago

8 0

Answer:

Step-by-step explanation:

B. -3

Hope that helps!

Katena32 [7]2 years ago

5 0

Answer:

-3

Step-by-step explanation:

They are opposite signs so it is negative.

Y multiplied by 3 gives up x in each set.

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Simplify three to the negative ninth divided by three to the negative twelfth in decimal form.

inysia [295]

The answe is 3 to the third or 27

6 0

3 years ago

Central City High School's robotics team is at a competition. In the last round, the team earned 80 points for climbing over an

sweet [91]

Answer:

344 = 12*22 + 80

Step-by-step explanation:

They made the ball 22 times

6 0

3 years ago

A tree in John's backyard has been growing for 4 1/2 years. The tree is 4/5 meters tall. What is the unit rate in meters per yea

STatiana [176]

Answer:

5 127/200 meters

Step-by-step explanation:

4 1/2 = 4 5/10 | 4/5 = 8/10

--------------------------------------

4 5/10 = 4.5 | 8/10 = 0.8

--------------------------------------

4.8 divided by 0.8 = 5.625

--------------------------------------

5.635 = 5 635/1000

635/1000 divided by 5 = 127/200

--------------------------------------

5 + 127/200 = 5 127/200

4 0

3 years ago

Solve the equation: k^2+5k+13=0

mr_godi [17]

Step-by-step explanation:

k² + 5k + 13 = 0

Using the quadratic formula which is

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac } }{2a} \\$

From the question

a = 1 , b = 5 , c = 13

So we have

$k = \frac{ - 5 \pm \sqrt{ {5}^{2} - 4(1)(13) } }{2(1)} \\ = \frac{ - 5 \pm \sqrt{25 - 52} }{2} \\ = \frac{ - 5 \pm \sqrt{ - 27} }{2} \: \: \: \: \: \: \\ = \frac{ - 5 \pm3 \sqrt{3} \: i}{2} \: \: \: \: \: \:$

Separate the solutions

$k_1 = \frac{ - 5 + 3 \sqrt{3} \: i }{2} \: \: \: \: or \\ k_2 = \frac{ - 5 - 3 \sqrt{3} \: i}{2}$

The equation has complex roots

Separate the real and imaginary parts

We have the final answer as

$k_1 = - \frac{5}{2} + \frac{3 \sqrt{3} }{2} \: i \: \: \: \: or \\ k_2 = - \frac{5}{2} - \frac{3 \sqrt{3} }{2} \: i$

Hope this helps you

8 0

2 years ago

Karen bought 203 stickers. Each sheet had 13 stickers.She gave away 809 stickers to her friends. How many stickers does Karen ha

andrew11 [14]

Answer:

1830 sickers, 140.8 sticker sheets left

Step-by-step explanation:

13*203 = 2639

2639-809=1830

3 0

3 years ago