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Thepotemich [5.8K]
3 years ago
6

Two times a number plus four is 22. What is the number? 2 6 9 11

Mathematics
2 answers:
stiv31 [10]3 years ago
6 0

Answer: The correct answer is 9

Step-by-step explanation: Step 1: Subtract 4 from both sides.

2x+4−4=22−4

2x=18

Step 2: Divide both sides by 2.

\frac{2x}{2} =\frac{18}{2}

x=9

34kurt3 years ago
3 0

Answer:

9

Step-by-step explanation:

22-4 = 18 ("plus four")

18/2 = 9 ("two times a number")  

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The tens digit of a two-digit number is five more than the units digit. Seven times the sum of the digits of this number is 3 le
I am Lyosha [343]

Answer:

43

Step-by-step explanation:

Let

The unit digit = x

The tens digit = y

The number = 10x + y

The tens digit of a two-digit number is five more than the units digit.

y = x + 5

Seven times the sum of the digits of this number is 3 less than the number itself.

7(x + y) = 10x + y - 3

7x + 7y = 10x + y - 3

Find the number.

We substitute x + 5 for y

7x + 7(x + 5) = 10x + (x + 5) - 3

7x + 7x + 35 = 10x + x + 5x - 3

14x + 35 = 11x + 5x - 3

Collect like terms

35 + 3 = 11x + 5x -14x

38 = 16x - 14x

38 = 2x

x = 38/2

x = 19

Solving for y

y = x + 5

y = 19 + 5

y = 24

The number = 19 + 24

= 43

3 0
2 years ago
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What is a reasonable metric unit of length for a truck?
Luden [163]

Answer:

c meter

Step-by-step explanation:

7 0
2 years ago
If elephant grass grows 2 1/3 inches a day, how many inches will it grow in 8 days?
geniusboy [140]

2 1/3 * 8 = 16 8/3 or 18 2/3 inches in 8 days.

8 0
3 years ago
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What is a common tool between length and mass
Tema [17]
Seems like a wordplay question.

A "scale" is used for measuring length.

A different sort of "scale" is used for measuring mass.
8 0
2 years ago
N + N - 35000=833000
adell [148]

Answer:

N + 434000

Step-by-step explanation:

N + N - 35000 = 833000

(add 35000 to both sides)

N + N = 868000

(N + N is equivalent to 2N)

2N = 868000

(divide both sides by 2)

N = 434000

8 0
3 years ago
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