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vagabundo [1.1K]
2 years ago
9

-2(n+3 = -12

Mathematics
2 answers:
Blizzard [7]2 years ago
6 0

Answer: n=3

Step-by-step explanation:

Divide by - 2

(N+3) = 6

Subtract 3

N= 3

serg [7]2 years ago
5 0

Answer:

n = 3

Step-by-step explanation:

-2(n+3) = -12

-2n - 6 = -12

      +6    +6

-------------------

-2n = -6

/-2     /-2

-------------------

n = 3

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Explain how you can find the sign of the product of two or more rational numbers
Solnce55 [7]

Comparing two rational numbers

<span> Use fraction form: </span>

 

Make the denominators the same and compare the numerators. The number with the smaller numerator is smaller. For example, to compare a/b and c/d, we rewrite

 

a/b=a*d/b*d

<span>  = ad/bd and c/d = c*b/d*b=bc/bd</span>

 

Now just compare the numerators : "ad" and "bc"

 

<span>Multiplying and Dividing Rational Numbers  </span>

 

Multiplying and dividing rational numbers in decimal form is the same as multiplying and dividing integers. The decimal place of the product is the same of all decimals of all multiplied numbers. For example, 3.12*2.4.

 

Solution => 3.12*2.4=7.488

 

When multiplying or dividing rational numbers in fractional form, you multiply the numerators (N*N) and then multiply the denominators (D*D).

 

When dividing rational numbers in fractional form, first take the reciprocal of the divisor, and then multiply the numerators and the denominators.

 

Example => 5/9 divided by 2/7 .

 

<span>Solution => 5/9 * 7/2 =  35/18 </span>

 

 

Adding Rational numbers

 

Adding and Subtracting rational numbers in decimal form is the same as adding and subtracting integers.

 

Example => -3.54+2.79=-0.75

 

When adding or subtracting rational numbers in fractional form, first make the denominator equal, and then add or subtract the numerators. 

8 0
3 years ago
Help!
Galina-37 [17]

Answer:

B

Step-by-step explanation:

Note:

1 gal = 4 quarts

1 pint = 0.5 quart

Re-writing all the choices in dollars and quarts and calculating how much each quart costs

A)  $1 per 1 quart

B)  $2 per gallon = $2 per 4 quarts = $2 ÷ 4 quarts = $0.50 per quart

C)  $1.50 per 2 quarts = $1.50 ÷ 2 quarts = $0.75 per quart

D)  $0.50 per 1 pint = $0.50 per 0.5 quart = $0.50 ÷ 0.5 quart = $1 per quart

If you compare all of the above, it is clear that answer B ($0.50 per quart) is the cheapest rate and hence the best deal.

6 0
3 years ago
Conjectures and Postulates are accepted as true without formally proving they are true.
zlopas [31]
The answer is false, it is only true for postulates, not conjectures.
7 0
3 years ago
Read 2 more answers
1 point<br> 9) A 12-foot long sub sandwich is cut into 7 equal pieces. How long is each<br> piece? *
Makovka662 [10]

Answer:

20 4/7 inches

Step-by-step explanation:

Take 12 feet and convert to inches

1 ft = 12 inches

12 * 12 = 144 inches

Divide by 7

144/7 =20 with 4 left over

20 4/7 inches

5 0
3 years ago
Read 2 more answers
Haruka owns an umbrella factory. The revenue, RRR, she makes from selling nnn umbrellas is given by the function R(n)=18nR(n)=18
Levart [38]

<u>Answer:</u>

E(n) = n + 5


<u>Explanation:</u>

The profit is the difference between the amount of money received as a revenue and the amount of money spent as expenses.

<u>This means that:</u>

Profit = Revenue - Expenses


<u>Rearrange the formula to solve for the expenses, we get:</u>

Expenses = Revenue - Profit


<u>We are given that: </u>

Revenue = R(n) = 18n

Profit = P(n) = 17n - 5


<u>Substitute in the above formula to get the formula for expenses as follows:</u>

E(n) = R(n) - P(n)

E(n) = 18n - (17n-5)

E(n) = 18n - 17n + 5

E(n) = n + 5


Hope this helps :)

5 0
3 years ago
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