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2 years ago

Three times a number increased by ten is equal to twenty

Mathematics

2 answers:

ivolga24 [154]2 years ago

8 0

the wording is a little confusing so it could be either of these answers.

3x + 10 = 20

-10. -10

3x = 10

x = 10/3

3(x +10) = 20

3x + 30 = 20

-30. -30

3x = -10

x = -10/3

JulijaS [17]2 years ago

6 0

Answer:

The number is 10/3

Step-by-step explanation:

Step 1: Convert words into an expression

Three times a number increased by ten is equal to twenty

(3n) + 10 = 20

Step 2: Subtract 10 from both sides

3n + 10 - 10 = 20 - 10

3n = 10

Step 3: Divide both sides by 3

3n / 3 = 10 / 3

n = 10/3

Answer: The number is 10/3

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2 years ago

10 < –2b or 2b + 3 > 11

Zinaida [17]

10 < –2b or 2b + 3 > 11 represents 2 different sets of numbers.

10 < –2b can be reduced by dividing both sides by -2; you must then reverse the direction of the < sign: -5 > b, which is the interval b < -5: (-infinity, -5).

2b + 3 > 11 reduces to 2b > 8, which in turn reduces to b > 4: (4, infinity).

It may be helpful to graph these sets.

If you really do mean "10 < –2b or 2b + 3 > 11," then the "solution" is made up of two sub-intervals: b < -5 and b > 4.

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2 years ago

Wich expression shows the product of 9 and a number?

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Answer:

There are two and they both mean the same thing.

Step-by-step explanation:

1. 9 x (times) n

2. 9n

I hope this helps u! :D

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2 years ago