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andrew11 [14]
3 years ago
10

Where can we put parenthesis in 21 + 21 divided by 7 to make it equivalent to 6?

Mathematics
2 answers:
timurjin [86]3 years ago
7 0

Answer:

1.) \frac{(21+21)}{7}

2.)(\frac{21+21}{7} )

Step-by-step explanation:

\frac{21+21}{7}

If you just solve it like this, you get 6.

So, the parenthesis would go on the whole thing, or where 21+21 is.

1.) \frac{(21+21)}{7}

2.)(\frac{21+21}{7} )

DiKsa [7]3 years ago
4 0

(21+21)÷7

Step-by-step explanation:

21+21=42 42÷7=6 I'm not good at explaining lol

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Please helpppppp, i'm stuck
nata0808 [166]

Answer:

The operations you see with you eyes are multiplication and addition.

4 times X plus 2 = 10

The operations you don't see are Subtraction and Division.

4x+2=10

Subtract 2 from both sides.

4x+2−2=10−2

4x=8

Divide both sides by 4.

4x/4  =  8/4

x=2

3 0
2 years ago
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A certain virus is dying off at a rate of 18% per hour. Initially there were
djyliett [7]

Answer:

3 strain would still alive after 48 hours

Step-by-step explanation:

Initial population of virus = 40000 grams

A certain virus is dying off at a rate of 18% per hour.

We are supposed to find  how much of the  strain would still be alive after 48 hours

Formula : N(t)=N_0(1-r)^t

N_0=Initial population

N(t)= Population after t hours

r = rate of decrease = 18% = 0.18

t = time = 48 hours

So,the  strain would still be alive after 48 hours=40000(1-0.18)^{48}=2.91 \sim 3

Hence 3 strain would still alive after 48 hours

3 0
3 years ago
Tamara has money in a savings account
olga2289 [7]

Answer:

  • 1.03a

Step-by-step explanation:

  • Amount in account = a
  • Interest rate = 3% per month

<u>Amount after a month:</u>

1. ........................

  • a*(1 + 0.03) =
  • 1.03a

2. ........................

  • a + 0.03a =
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4 0
3 years ago
Will mark brainliest. will be reported if only for the points
tia_tia [17]

Answer:

d=~7.6

Step-by-step explanation:

7^2+3^2=d^2

49+9=d^2

58=d^2

Square root of 58=~7.6

d=~7.6

6 0
2 years ago
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The area of a rectangular patio is 5 5/8 square yards, and it's length is 1 1/2 yards. What is the patio's width in yards?
MAXImum [283]
Hello there! Thank you for asking your question here at Brainly. I will be assisting you today with answering this problem, and will be teaching you how to deal with it on your own in the future.

First, let's take a look at our question, and evaluate it.

"The area of a rectangular patio is 5 5/8 square yards, and it's length is 1 1/2 yards. What is the patio's width in yards?"

To clarify this problem, we are looking for the patio's width.

Let's first understand what the area of a rectangular shape is.
The formula for the area of a rectangle is "Length times Width", or "L • W".

So this is how the equation should look like:
A = L • W
We have our area, 5 5/8, and we have our length, 1 1/2.

To make things more simple, let's convert our fractions to decimals. Now, to convert our fractions to decimals, let's set our denominators (the numbers on the bottom of a fraction) equal to another fraction, with x as the numerator (the numbers on the top of a fraction) and 100 as the denominator.

So we have 1/2 and x/100. Divide 100 by 2 to find x (as 1/2 of anything is dividing by 2).
100 / 2 = 50, so 1 1/2 = 1.50 as a decimal.

Now, let's try 5/8.
1/8 = 0.125, so multiply 0.125 by 5.
0.125 • 5 = 0.625.
5 5/8 = 5.625 as a decimal.

So, now we have our equation:
A = L • W
Plug in our numbers.
5.625 = 1.50x

To isolate and solve for x, we need to divide both sides by 1.50, so let's do that.
5.625 / 1.50 = 3.75
1.50x / 1.50 = x

We are now left with:
x = 3.75

Your answer is:
The patio's width is 3.75 yards.

I hope this helps!
8 0
3 years ago
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