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3 years ago

21x-9 what is the answer

Mathematics

1 answer:

Snowcat [4.5K]3 years ago

8 0

Answer:

3(7−3)

Step-by-step explanation: 219−

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Percentage:

masha68 [24]

20 percent
If you cross multiply 30 w/ 100 and then divide it by 150 you will get 20.

5 0

2 years ago

Melissa bought 2 shirts and 3 skirts and spent between $45 and $60. Each shirt costs the same amount. Each skirt costs the same

sukhopar [10]

Answer:

Least is 7

Most is 12

Step-by-step explanation:

So 2 shirts for 12.

So 24

Take 24 off of both

Left with 21 to 36

21÷3 is 7

36÷3 is 12

Hope this helps

6 0

3 years ago

Read 2 more answers

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

Kelly, Matt, and Bo are sharing 2 pizzas equally. How much pizza does each person get?

kvasek [131]

Answer:

Hi! The answer is $1.5$

Step-by-step explanation:

$Kelly + Matt + Bo = 3$

$3, People / 2, Pizzas$

$3/2 = 1.5$

$1.5, Pizzas$

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☁Brainliest is greatly appreciated!☁

Hope this helps!!

- Brooklynn Deka

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3 years ago

The Pythagorean theorem

Art [367]

The answer is 15.
hope this helps!

3 0

3 years ago

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