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3 years ago

What is 12x – 20 – 5(x – 3)?

Mathematics

2 answers:

OlgaM077 [116]3 years ago

8 0

Answer:

ddddddddddddc daf a reag ehh fdsh

Step-by-step explanation:

Kazeer [188]3 years ago

5 0

Answer: =7x−5

Step-by-step explanation: Hope this help :D

Let's simplify step-by-step.

12x−20−5(x−3)

Distribute:

=12x+−20+(−5)(x)+(−5)(−3)

=12x+−20+−5x+15

Combine Like Terms:

=12x+−20+−5x+15

=(12x+−5x)+(−20+15)

=7x+−5

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What is the answer

vichka [17]

An excluded value is one where the bottom of the fraction = 0.

In your case 1-3x=0
1=3x
x=1/3

At this point, the function does not exist. If you were to draw a graph of it, there wouldn't be a y-value corresponding to x=1/3.

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3 years ago

3. Three years ago, Jane was three times as old as Alice. In two years time, the sum of their ages will be 62. Determine their p

anzhelika [568]

3 yrs ago:

Alice - x
Jane - 3x

Fast forward 2 years... 1 year ago:

Sum of their ages = 62

Equation to solve: x + 3x = 62
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x = 15.5

From this, we can deterime that Alice is 15 1/2 years old.

Then, plug in 15.5 for x in 3x to find Jane's age.

15.5 × 3 = 46.5

From this, we can determine that Jane is 46 1/2 years old.

I hope this helps you to understand this problem better.

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4 years ago

Read 2 more answers

The Marcos family consists of 2 adults and 4 children. They spent a total of $40 on circus tickets. Let x represent the cost of

matrenka [14]

Answer:

First Option

Step-by-step explanation:

First, we will find the equation for the total cost of the tickets.

Given x = Cost of 1 adult ticket

y = Cost of 1 Child ticket

Total Cost of tickets at $40:

2x + 4y = 40

To find which graph represent the cost of the tickets,

we can substitute x = 0 to find y and vice-versa.

If x = 0 ,

$2(0) + 4y = 40\\4y = 40\\y = \frac{40}{4} \\= 10$

So when x = 0 , y = 10 which gives the coordinates (0,10).

Now if y = 0,

$2x+4(0) = 40\\2x = 40\\x = \frac{40}{2} \\= 20$

So when y = 0 , x = 20 which gives the coordinates (20,0)

This shows that this particular line passes through these 2 points and therefore the answer is the first option.

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