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3 years ago

How many rows of 3 are in 21

Mathematics

2 answers:

zysi [14]3 years ago

7 0

Thats ture becuase if you divide 21÷3 = 7

lora16 [44]3 years ago

6 0

Umm i think it would be 7 because 7 times 3 is 21

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Visitors to a carnival are invited to guess the number of beans in a jar. The person who guesses the correct number wins $300 if

andrew11 [14]

The relationship between the two variables is inverse proportionality, that is, the greater the number of people, the less the amount of money earned.

Since visitors to a carnival are invited to guess the number of beans in a jar, and the person who guesses the correct number wins $ 300, but if multiple people guess correctly, the prize will be divided evenly among them, to determine what is the relationship between the number of people who guess correctly and the amount of money each person will recieve the following logical reasoning must be performed:

Since the prize is a fixed number, 300, it is a value that will not change. In turn, the more people who have guessed right, the lower the amount of money that each of them will win (because the number 300 will be divided by a greater number).

Therefore, the relationship between the two variables is inverse proportionality, that is, the greater the number of people, the less the amount of money earned.

Learn more in brainly.com/question/2548537

5 0

3 years ago

The are of a rectangle room is 80 square feet. I’f the length of one side of the room is 8 feet, what is the perimeter of the ro

leonid [27]

The answer is 36. I know this because since one of the lengths of the room is 8, you take 80 and divide it by 8 which gives you 10. So now that you know the two side lengths you add. 10+10+8+8 which is 36.

7 0

3 years ago

X+y/y−x when x=4 and y=3

daser333 [38]

Answer:

Step-by-step explanation:

4+3/3-4

3/3 = 1

4-4 = 0

1 + 0 = 1

6 0

2 years ago

A county government says that a safe level of chlorine in a hot tub is within 1.75 ppm of 3.25 ppm.

Schach [20]

Answer:

Part A : |x-2.5| ≤ 0.75 , x ∈ [1.75,3.5]

Part B : yes, the lifeguard should add more chlorine.

Step-by-step explanation:

Part A:

Let C is the variation of the level of chlorine in a hot tub.

Level of chlorine in a hot tub is within 1.75 ppm of 3.25 ppm.

To find absolute value inequality, need to find the standard level of chlorine 1.75 + C or 3.25 - C

1.75 + C = 3.25 - C

2C = 5

C = 2.5

So, the standard level would be 2.5 ppm,

If x represents the present level of chlorine,

Then it would be lie within 1.75 ppm of 3.25 ppm.

1.75 ≤ x ≤ 3.25

Subtract 2.5 from all sides

1.75 - 2.5 ≤ x -2.5 ≤ 3.25 - 2.5

-0.75 ≤ (x-2.5) ≤ 0.75

which is equivalent to the following absolute value inequality.

|x-2.5| ≤ 0.75

And the solve of the inequality : x ∈ [1.75,3.5]

Part B: If x = 1.0 ppm,

∴ |1.0-2.5| = 1.5 which is not less than equal to 0.75.

Another explanation:

the minimum safe level of chlorine in a hot tub is 1.75 ppm

Since 1 < 1.75

Therefore, lifeguard should add more chlorine.

8 0

3 years ago

Plz help......idk what to pick I think D tho I just dont want to get it wrong

Anarel [89]

Answer:

$A.-1\frac{1}{7}$

Step-by-step explanation:

$Well, there\ is\ a\ simple\ way\ to\ approach\ it.\\-9\frac{2}{7} -(-10\frac{3}{7})\\-9\frac{2}{7} +10\frac{3}{7}\\Separate\ out\ the\ integer\ terms\ and\ the\ fraction\ terms.\\Hence,\\-9+10+\frac{2}{7}+ \frac{-3}{7}\\=1+\frac{2-3}{7} \\=1\frac{-1}{7} \\=-1\frac{1}{7}$

8 0

2 years ago

Read 2 more answers