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3 years ago

What is 12x-3+2x+13 equivalent to

Mathematics

2 answers:

storchak [24]3 years ago

7 0

Answer:

2(7x+5)

Step-by-step explanation:

Sonbull [250]3 years ago

7 0

Answer:

14x+10

Step-by-step explanation:

12x-3+2x+13

12x+2x+10

14x+10

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If your weekly allowance of $20 increases by 10%, then decreases by 10%, how much will you earn each week?

Alika [10]

1) The amount M 1 IS $20 increases by 10% = 10 % *(20) + 20 = 22

2) The amount M1 decreases by 10% = 22- (10%*22) = $ 19,8 IS THE AMOUNT that i earn each week

7 0

4 years ago

Read 2 more answers

The sum of the ages of ahsan and his mother is 61 years.The difference in their ages is 29 years.By forming a pair of simultaneo

Llana [10]

Answer:

(i). Ahsan's Present Age = 16

(ii). Age of Ahsan's Mother when ahsan is 21 years old = 50

Step-by-step explanation:

Let's say, x represents the age of ahsan.

y represents the age of his mother.

The system of equation from the date given is:

$\begin{bmatrix}x+y=61\\ -x+y=29\end{bmatrix}$

Solve them will get us:

$x=16,\:y=45$

Regards: Umer

8 0

3 years ago

Factories 54m3n + 81m4n2 b) 15x2y3z + 25x3y2z + 35x2y2z

Oliga [24]

Part a)

Given the expression

$54m^3n\:+\:81m^4n^2$

Apply exponent rule: $a^{b+c}=a^ba^c$

$54m^3n\:+\:81m^4n^2=54m^3n+81m^3mnn$ ∵ $m^4n^2=m^3mnn$

Rewrite 81 as 3 · 27

Rewrite 54 as 2 · 27

$=2\cdot \:27m^3n+3\cdot \:27m^3mnn$

Factor out the common term: 27m³n

$=27m^3n\left(2+3mn\right)$

Therefore,

$54m^3n\:+\:81m^4n^2=54m^3n+81m^3mnn=27m^3n\left(2+3mn\right)$

Part B)

Given the expression

$15x^2y^3z+25x^3y^2z+35x^2y^2z$

Apply exponent rule: $a^{b+c}=a^ba^c$

$15x^2y^3z+25x^3y^2z+35x^2y^2z=15x^2y^2yz+25x^2xy^2z+35x^2y^2z$

Rewrite as

$=3\cdot \:5y^2x^2zy+5\cdot \:5y^2x^2zx+7\cdot \:5y^2x^2z$

Factor out common term 5y²x²z

$=5y^2x^2z\left(3y+5x+7\right)$

Therefore,

$15x^2y^3z+25x^3y^2z+35x^2y^2z=5y^2x^2z\left(3y+5x+7\right)$

8 0

3 years ago

Pam needs 3 1/2 cups of sugar to make 50 cupcakes. A 5- pound bag of sugar coats $3.69. There are about 2 cups of sugar in a pou

Lorico [155]

Answer:

The answer to your question is $1.29

Step-by-step explanation:

Data

Total amount of cupcakes = 50

Total amount of sugar = 3 1/2 cups = 3.5 cups

Cost of 5-pound bag = $3.69

2 cups = 1 pound

Total cost = ?

Process

1.- Calculate the amount of pounds needed

2 cups ------------------ 1 pound

3.5 cups --------------- x

x = (3.5 x 1) / 2

x = 3.5 / 2

x = 1.75 pounds

2.- Calculate the price of 1.75 pounds

5 pounds -------------- $3.69

1.75 pounds ---------- x

x = (1.75 x 3.69)/5

x = 6.46/5

x = $1.29

3.- Conclusion

The cost of sugar to prepare 50 cupcakes is $1.29

3 0

3 years ago

Which expression is equivalent to n+n+n? A. 3^n B. 3n C. n^3 D. n+3

Irina18 [472]

Answer:

B. 3n

Step-by-step explanation:

n + n + n = 3n

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

3n = n + n + n

#IhopeThisHelp

5 0

2 years ago