All categories

3 years ago

Three times the difference of a number and 9 is -3. Find the number

Mathematics

1 answer:

Drupady [299]3 years ago

4 0

3(n-9)=-3
3n-27=-3
3n=-30
n=-10

You might be interested in

14) A submarine is at a depth of 550 meters below sea

natta225 [31]

X=30 degrees for each of the congregant angles

3 0

3 years ago

Did not mean to post and now this bubble won't go away :)

viktelen [127]

awwww..... that's what happens if you can't restrain yourself from judgment to one person . it will imprint on itself nor the sayings .

6 0

3 years ago

Read 2 more answers

Pierre uses 30 grams of chocolate to make

Travka [436]

Pierre can make 3 liters of chocolate sauce from 450 grams of chocolate.

Step-by-step explanation:

Given,

Chocolate used to make 200 ml of chocolate sauce = 30 grams

Ratio of chocolate to milliliters of chocolate sauce = 30:200

Let,

x be the milliliters of sauce made from 450 grams of chocolate

Ratio of chocolate to ml of sauce = x:450

Using proportion;

Ratio of chocolate to ml of sauce:: ratio of chocolate to ml of sauce

$30:200::450:x$

Product of extreme = Product of mean

$30*x=200*450\\30x=90000$

Dividing both sides by 30

$\frac{30x}{30}=\frac{90000}{30}\\x=3000$

450 grams of chocolate will make 3000 milliliters of chocolate sauce.

We will convert this in liters.

1 liter = 1000 ml

3000 ml = $\frac{3000}{1000}$ = 3 liters

Pierre can make 3 liters of chocolate sauce from 450 grams of chocolate.

Keywords: ratio, proportion

Learn more about proportion at:

#LearnwithBrainly

3 0

3 years ago

Please help for both questions

scoundrel [369]

Answer:

B, A

Step-by-step explanation:

In the first equation, if an unknown number plus 17 equals 66, then what step would you take?

For example, if an unknown number plus 2 equaled 3, then you would know that number is 1, right? What steps did you take to get that? You subtracted 2 from both sides.

In this example, if x + 17 = 66, then subtracting 17 from both sides gets us x = 49.

The same applies for the second example. If x minus 54 equals 125, then you would add 54 to get x = 179.

4 0

3 years ago

a bus is full of passengers. if you count them by either twos, threes, or fives, there is one left. if you count them by seven t

devlian [24]

Answer:

91.

Step-by-step explanation:

The least number will be a multiple of 7 while the number - 1 will be a multiple of 2,3 and 5.

2*3*5 = 30 but 31 is not a multiple of 7.

2*2*3*5 = 60 but 61 is not divisible by 7.

2*3*3*5 = 90 and 91 is divisible by 7.

3 0

3 years ago