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kari74 [83]
3 years ago
13

Please tell me the answer! I'm crying in confusion! :(

Mathematics
2 answers:
Natalka [10]3 years ago
8 0
Find the common denominator:

3   6   9
--  --   --  
7  14  21

1  2  3  4  5  6      7     8
--  -- -- -- -- -- --   ---    ---
3  6  9  12  15    18    21

Ok, so we know the common demonators are 9/21 and 8/21

Now we subtract  9/21 and 8/21 which is 1/21 

So.. There is 1/21 pizza left!

Hope this helped :))

Inessa [10]3 years ago
6 0
First, change the fractions to a common denominator, which is 21. 

so 3/7 * 3/3  = 9/21

1/3 * 7/7 = 7/21

Add the two together

9/21 + 7/21 = 16/21

Then take 21/21 - 16/21 = 5/21

There is 5/21 of the pizza left.
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Stan's heart rate, in beats per minute, was measured 20 times at random. The results are 82, 84, 98, 112, 97, 93, 91, 87, 112, 8
Licemer1 [7]

Answer:

(80.4942, 94.9052)

Step-by-step explanation:

The sample mean is x = 87.7.

The sample standard deviation is s = 11.26.

At 99% confidence and 19 degrees of freedom, the critical value is t = 2.861.

The confidence interval is:

x ± t (s/√n)

87.7 ± 2.861 (11.26 / √20)

87.7 ± 7.2053

(80.4947, 94.9053)

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3 years ago
Find x.<br><br> special 17<br><br> A. 22<br> B. 113√2<br> C. 116√2<br> D. 33
vladimir1956 [14]

The value of x in the triangle is (a) 22

<h3>How to solve for x?</h3>

The complete question is in the attached image.

From the attached image of the triangle, we have:

\sin(45) = \frac{x}{22\sqrt 2}

Evaluate sin(45)

\frac{1}{\sqrt 2} = \frac{x}{22\sqrt 2}

Solve for x

x = \frac{22\sqrt 2}{\sqrt 2}

Divide

x = 22

Hence, the value of x is (a) 22

Read more about special triangles at:

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7 0
2 years ago
Are the triangles similar?
Reil [10]
C. Not similar hope this helps
8 0
2 years ago
Find the diameter of a circle with an area<br> of 415.48 square inches.
lozanna [386]
D= 23 in.

hope its what you’re looking for :)
8 0
3 years ago
The length of a rectangle is 7 ft longer than twice the width. If the perimeter is 92 ft find the length and width of the rectan
user100 [1]

Width of the rectangle is 13 ft and length of the rectangle is 33 ft

<u>Step-by-step explanation:</u>

Step 1:

Given perimeter of the rectangle = 92 ft. Let the width be x, then the length of the rectangle = 2x + 7. Use the formula for perimeter of a rectangle = 2(length + width) to find the dimensions.

92 = 2(2x + 7 + x) = 2(3x + 7) = 6x + 14

⇒ 92 = 6x + 14

⇒ 78 = 6x

⇒ x = 78/6

∴ x = 13 ft

⇒ Width of the rectangle = 13 ft

∴ Length of the rectangle = 2x + 7 = 26 + 7 = 33 ft

4 0
3 years ago
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