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2 years ago

Help please quick! Plato

Mathematics

1 answer:

Radda [10]2 years ago

8 0

Answer:

Step-by-step explanation:

The function (f+g)(x) is the sum of the two functions:

(f+g)(x) = f(x) +g(x) = (ln(2x) -15) +(3sin(x) -7)

= ln(2x) +3sin(x) +(-15 -7)

(f+g)(x) = ln(2x) +3sin(x) -22

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9/20

NISA [10]

For this case we must find the solution of the following quadratic equation:

$x ^ 2 + 5x + 7 = 0$

Where:

$a = 1\\b = 5\\c = 7$

Then, the solution is given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Substituting the values:

$x = \frac {-5 \pm \sqrt {5 ^ 2-4 (1) (7)}} {2 (1)}\\x = \frac {-5 \pm \sqrt {25-28}} {2}\\x = \frac {-5 \pm \sqrt {-3}} {2}$

By definition we have: $i ^ 2 = -1$

$x = \frac {-5 \pm \sqrt {3i ^ 2}} {2}\\x = \frac {-5 \pm i \sqrt {3}} {2}$

Thus, we have two complex roots.

Answer:

The equation has no real roots.

4 0

3 years ago

How do you solve -28-6x=-2(1-3x)-2

Zina [86]

-28-6x=-2(1-3x)-2

-28-6x=-2+6x-2

-28-6x=-4+6x

-6x-6x=-4+28

-12x=24

x=-2

6 0

3 years ago

Read 2 more answers

Please help thx a bunch

kirza4 [7]

A.
2/3A=-24
time both sides by 3/2
A=-72/2
A=-36

B.
20=-B/0.2
times both sides by 0.2
4=-B
times -1
-4=B

distance between 2 points x and y is |x-y|

so
distance between A and B is distance between -4 and -72 or
|-72-(-4)|=|-72+4|=|-68|=68
the distance is 68

4 0

2 years ago

What is the correlation coefficient for the data shown

ivann1987 [24]

Answer:

1 is the answer

I hope this helps you

7 0

2 years ago

Is -6.75 a rational or irrational number?

marta [7]

The number -6.75 is rational if it is an integer or decimal. -6.75 is a decimal, so -6.75 is rational, not irrational.

ANSWER: rational

5 0

3 years ago