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tamaranim1 [39]
3 years ago
7

Which of the following had a value of 8

Mathematics
1 answer:
Umnica [9.8K]3 years ago
8 0
What are the choices for this
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4+n divided by 43+n equals to 1/3 what is n?
Mariana [72]

Answer:

n = 15.5

Step-by-step explanation:

(4+n)/(43+n) =1/3

3(4+n)= 1*(43 + n)

12 + 3n = 43 + n

3n - n = 43 - 12

2n = 31

n = 31/2= 15.5

8 0
3 years ago
Define variables and write a system of equations for each situation. Solve by using substitution.Suppose you want to join a vide
MrRa [10]

Answer:

The cost is the same after 15 video rentals

Step-by-step explanation:

Let the total cost be y

Let the number of video rentals made be x

Discount card for Big video = $9.99

Discount card for Main Street video = $20.49

Cost of 1 big video rental = $2.49

Cost of 1 Main Street video rental = $1.79

Cost of video rentals with big video:

Y = 9.99 + 2.49x………….(1)

Cost of video rentals with main street video :

Y = 20.49 +1.79x…………(2)

For the two costs to be equal, the two equations have to be equal to each other

Equating equations (1) and (2)

9.99 + 2.49x = 20.49 +1.79x

0.7x = 10.5

X = 10.5/0.7

X = 15  video rentals

8 0
3 years ago
A shopper buys 3 notebooks for $5 each. The percent sales tax is 8%. How much is the total sale?
Tamiku [17]

Answer:

$16.20

Step-by-step explanation:

3x5=15 15x.08=1.2 15+1.2=16.2

7 0
3 years ago
Read 2 more answers
Mrs. Jones has a local bakery. Last week this expression shows how many peanut butter cupcakes she baked. 5 (2x -4) + 3(3 + 4x)
Natasha_Volkova [10]

Answers:

A: 11(2x-1)

B: 121 cupcakes

Step-by-step explanation:

<u>Part A: </u>

We have the following expression that models the quantity of cupcakes Mrs. Jones baked last week:

5(2x -4) + 3(3 + 4x)

Applying distributive property:

10x-20+9+12x

Grouping similar terms:

22x-11

Applying common factor 11:

11(2x-1) This is the simplified expression

<u>Part B:</u>

Now that we have the simplified expresion, we have to evaluate how many cupcakes did Mrs. Jones bake if x=6:

11(2(6)-1)

11(12-1)=11(11)=121 Hence, Mrs. Jones baked 121 cupcakes last week

7 0
3 years ago
What times 2 equels -108
Igoryamba
-54 i think is the answer 
8 0
3 years ago
Read 2 more answers
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