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3 years ago

What is the value of x? Your answer may be exact or founded to thenearest tenth

Mathematics

1 answer:

sergeinik [125]3 years ago

3 0

Answer:

Step-by-step explanation:

180-35-32=113

113+(-5x+12)=180

subtract 113+12 from 180 to get -5x = 55

divide both sides by -5 to get x = -11

plug -11 into the equation

-5(-11)+12= 55+12= 67

the angle is 67 degrees

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Which rate convert to a unit rate of 12.50 per hour

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Answer: What rate do you mean? Thanks!

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3 years ago

What is the value of x if the average of 10, 11, 12 and x is 9?

frosja888 [35]

Answer: The value of x is 3.

Step-by-step explanation:

Since we have given that

10,11, 12 and x

Average of above numbers = 9

As we know that

Average is given by

$\dfrac{\text{Sum of observation}}{\text{Number of observation}}\\\\\\\dfrac{10+11+12+x}{4}=9\\\\10+11+12+x=9\times 4\\\\33+x=36\\\\x=36-33\\\\x=3$

Hence, the value of x is 3.

6 0

2 years ago

NEED HELP ASAP, WILL GIVE BRAINLIEST

dmitriy555 [2]

Answer:

The answer is C. 35, 7

6 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

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

<u>Separate the solutions</u>

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

The equation has complex roots

<u>Separate the real and imaginary parts</u>

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

Write 3 tens 9 ones in another way

Vsevolod [243]

3 tens is 3 * 10 = 30
9 ones is 9 * 1 = 9
30 + 9 = 39
Answer: 39

5 0

3 years ago

What is the value of x? Your answer may be exact or founded to thenearest tenth​

What is the value of x? Your answer may be exact or founded to thenearest tenth