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4 years ago

6x -18 +2x -9 pls help

Mathematics

2 answers:

sladkih [1.3K]4 years ago

8 0

Answer 8x-27 I will show you how to do it in the picture below

ivann1987 [24]4 years ago

7 0

Answer:

8x - 27.

Step-by-step explanation:

First add the numbers with the variable(x). Then combine the -18 and -9.

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Use y= x/2+ 50.

Effectus [21]

Answer:

300

Step-by-step explanation:

y=x/2+50

y=200, x=?

---------

200= x/2+50
x/2=200-50
x/2=150
x=150*2
x=300

7 0

3 years ago

There is a bag with only milk and dark chocolates.

Novay_Z [31]

Answer:

12 milk chocolates.

Step-by-step explanation:

-We know that probabilities add upto 1:

$P(milk)+P(dark)=1\\\\P(milk)+\frac{7}{9}=1\\\\P(milk)=\frac{2}{9}$

Let X be the total number of chocolates. We know that probability is the successful events divided by the total number of events:

$P(dark)=\frac{dark \ events}{total \ events}\\\\\\\frac{7}{9}=\frac{42}{X}\\\\X=54$

#We subtract the number of dark chocolates from X to get the number of milk chocolates:

$N_m=X-N_d\\\\=54-42\\\\=12$

Hence, there must be 12 milk chocolates.

6 0

3 years ago

Please solve this for 15 points

Travka [436]

Answer:5/6 7/8 because the cm get turned into seconds

8 0

4 years ago

If a gallon of paint covers 400 square feet, how many gallons are needed to paint a retaining wall that is 269 feet long and 4 f

Nuetrik [128]

The area of a rectangular shape is given by

$A=l\times b$

Given:

It is given that a gallon of paint covers 400 square feet, and wall is 269 feet long and 4 feet high .

Now the area of wall will be

$A=269\times4$

Since,

$\begin{gathered} 400\text{ sq f}eet=\text{ 1gallon} \\ 1\text{ sq f}eet=\frac{1}{400}gallon \\ 269\times4\text{ sq f}eet=\frac{1}{400}\times269\times4 \\ =\frac{269}{100} \\ =2.69\text{ gallon} \\ =3\text{ galllon} \end{gathered}$

So, the ewall requires approx 3 gallon of paint.

5 0

2 years ago

SHOW YOUR WORK! MARK THE BRAINIEST!

avanturin [10]

Answer:

These are the steps to the problem that you are trying to solve. hope it's useful

8 0

3 years ago