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3 years ago

When 2 less than 3 lots of a number is doubled the result is 5

Mathematics

2 answers:

Marysya12 [62]3 years ago

8 0

The equation is 2(3x-2)=5

Katarina [22]3 years ago

5 0

Answer:

$(3x-2)2=5$

Step-by-step explanation:

3 lots of a number means 3x

Let the number be x whose 3 times we have to write.

Given is - When 2 less than 3 lots of a number , means $3x-2$ is doubled , means $(3x-2)\times2$ , the result is 5.

So, the complete answer becomes:

$(3x-2)2=5$

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The left and right page numbers of an open book are two consecutive integers whose sum is 23. Find these page number.

zavuch27 [327]

Answers: The page numbers are 11 and 12

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Explanation:

Consecutive integers are ones that follow immediately after another. For example, the set {7,8,9,10} are consecutive.

Let,

x = first page, some positive whole number
x+1 = second page, follows immediately after page x

Adding those two said pages will lead to 23

first + second = 23

(x) + (x+1) = 23

2x+1 = 23

2x = 23-1

2x = 22

x = 22/2

x = 11 is the first page

x+1 = 11+1 = 12 is the second page

Check: 11+12 = 23 which confirms the answers.

8 0

2 years ago

What is x=2yz for z

Mila [183]

Answer

First you would divide both sides by 2y so it would be

x/2y = z

Step-by-step explanation:

3 0

3 years ago

The aquarium charges an entrance fee of $5 per child and $12 per adult. On one day, 100 people visited the aquarium. They collec

igor_vitrenko [27]

Answer:

We set up 2 equations

A) C + A = 100

B) 5C + 12A = 780

We multiply A by -5

A) -5C -5A = -500 then we add B

B) 5C + 12A = 780

7A = 280

Number of Adults = 40

5C = 780 - 40*12

5C = 780 -480

5C = 300

Number of Children = 60

Step-by-step explanation:

6 0

2 years ago

Please help I’m really stuck

motikmotik

Answer:

A is the correct answer

have a great day

7 0

2 years ago

Which of the following is the solution to the following systems of inequalities? (picture included)

Ymorist [56]

Answer:

C. (see the attachment)

Step-by-step explanation:

Both inequalities include the "or equal to" case, so both boundary lines will be solid. That excludes choices A and D.

The first inequality is plotted the same way in all graphs, so we must look at the second inequality. The relationship of y and the comparison symbol is ...

-y ≥ (something)

If we multiply by -1, we get ...

y ≤ (something else)

This means the solution space will be on or below (less than or equal to) the boundary line. This is the shaded area in graph C. (Graph B shows shading above the line.)

___

Further comment

Since the boundary for the second inequality is fairly steep, "above" and "below" the line can be difficult to see. Rather, you can consider the relationship of x to the comparison symbol. For the second inequality, that is ...

x ≥ (something)

indicating the solution space is on or to the right of the boundary line.

3 0

3 years ago