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3 years ago

Solve for x: x - 9 = 15 A. 6 B. 24 C. -24 D. -6

Mathematics

2 answers:

Oduvanchick [21]3 years ago

4 0

Answer:

X = 24

Step-by-step explanation:

Add 9 To Both Sides

X - 9 + 9 = 15 + 9

Simplify

X = 24

Best Of Luck,

- I.A. -

loris [4]3 years ago

3 0

The answer is B. 24.

A isn't going to work, since 6 is less than 9. It'd give you a negative number.

D won't work, either, it'd give you -15. Again, you'd get a negative number.

C won't work for the same reasons as last time, it'd give you a negative number.

B gives you the exact number we're looking for, and it's a positive number.

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1 Point

alexandr1967 [171]

Answer:

Option C

Step-by-step explanation:

The given inequality is

5x-1 < 19 and $-3-x+1\le1$

Group similar terms to get:

5x < 19+1 and $-x\le1-1+3$

5x < 20 and $-x\le3$

Solve for x to get:

x < 4 and $x\ge -3$

The correct choice is C

4 0

3 years ago

Read 2 more answers

Choose the correct response

lilavasa [31]

Answer:

f(2) = 9

Step-by-step explanation:

It's give in the question,

Two different functions are,

f(x) = 4x + 1

g(x) = -2x

Then we have to find the output value of function 'f' for the input value x = 2.

By substituting the value of x in the function 'f',

f(2) = 4(2) + 1

= 9

f(2) = 9

5 0

3 years ago

A small town has 2000 inhabitants. At 8 AM, 160 people have heard a rumor. By noon half the town has heard it. At what time will

QveST [7]

Answer:

3:36 PM

Step-by-step explanation:

Let fraction (y) of the people that heard the rumor , the differential equation that is satisfied by the by y is,

$\frac{dy}{dt} = ky(1-y)$

Solving the differential equation,

$y(t) = \frac{y_{o}}{[y_{o} + (1 + y_{o})e^{-kt}]}$

The total number of inhabitants of the town = 2000

The number of people that heard the rumor = 160

At 8 AM, let t = 0,

$y(0) = \frac{160}{2000}$

= 0.08

By noon, half of the town as heard the rumor.

Then,

$y(4) = \frac{1}{2}$

Therefore,

$\frac{1}{2} = \frac{0.08}{[0.08 + (1 - 0.08)e^{-4k}]}$

$\frac{0.08}{[0.08 + 0.92e^{-4k}]} = \frac{1}{2}$

$0.08 + 0.92e^{-4k} = 0.16$

$0.92e^{-4k} = 0.16 - 0.08$

$0.92e^{-4k} = 0.08$

$e^{-4k} = \frac {0.08}{0.92}$

$k = - \frac{1}{4} In(\frac {0.08}{0.92})$

k ≈ 0.06106

Calculating time, t when y(t) = 90%

⇒ y(t) = 0.9

$\frac{0.08}{[0.08 + 0.92e^{-0.06106t}]} =0.9$

$0.08 + 0.92e^{-0.06106t} = \frac {0.9}{0.08}$

$0.08 + 0.92e^{-0.06106t} = 0.089$

$0.92e^{-0.06106t} = 0.089 - 0.08$

$0.92e^{-0.06106t} = 0.0089$

$t = - \frac{1}{0.06106}In (\frac{0.0089}{0.92})$

t = 7.59 hours

⇒ 7 hours 36 minutes

From 8 A.M. plus 7 hours 36 minutes = 3:36 PM

At 3:36 PM will 90% of the population have heard the rumor

7 0

3 years ago

HELPP ASAP<br><br> 2w - 30 = -26

ddd [48]

Add 30 to both sides.

2w - 30 + 30 = -26 + 30

2w = 4

Divide by 2.

w = 2

5 0

4 years ago

Read 2 more answers

(2m+3)(4m+3)=0<br>75 points! tell me how to do this! Plz?!

wel

Hi!

We can remove the parentheses.

2m+3+4m+3=0

Simplify by combining like terms.

2m+4m+3+3=0

6m+6=0

Subtract 6 from both sides.

6m+6-6=0-6

6m=-6

Divide by 6 on both sides.

6m/6=-6/6

m=-1

The answer is m = -1

Hope this helps! :)

-Peredhel

6 0

3 years ago

Read 2 more answers