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g100num [7]
2 years ago
5

Please help!! Would be appreciated:)

Mathematics
2 answers:
Art [367]2 years ago
6 0

Answer:

A. 21

B. 19

Step-by-step explanation:

Happy to help!

:D

Darya [45]2 years ago
3 0

Answer:

below

Step-by-step explanation:

3 a) 7 * 4 -7

--> 28 -7 =21 cm^2

b) 19 cm^2

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What property describes 6+0=6
Y_Kistochka [10]
<span>Additive Identity (Numbers)

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4 0
4 years ago
Solve cos x + rad 2 = -cos x for over the interval [0, 2pi ]
Kamila [148]
cos x + \sqrt{2} = -cosx \\  \\ 2 cos x + \sqrt{2} = 0 \\  \\ cos x = -\frac{\sqrt{2}}{2}

The cosine function is negative in 2nd and 3rd quadrants, So you know that you will have 2 solutions. One between pi/2 and pi, the other between pi and 3pi/2.

Refer to a unit circle to find that 
cos (\frac{3\pi}{4}) = -\frac{\sqrt{2}}{2}  \\  \\ cos (\frac{5\pi}{4}) = -\frac{\sqrt{2}}{2}

Final Answer:
x = \frac{3\pi}{4}, \frac{5\pi}{4}
6 0
3 years ago
Suppose we lined up all the people in the world (about 7.4 billion people). Assume that each person occupied 13 inches of the li
finlep [7]

Answer:

The answer to your question is: # of times = 60.7

Step-by-step explanation:

data

7.4 billion people

each person occupied 13 inches

Earth circumference = 25000 miles

length of the lines = 13 in x 7.4 billion people

                               = 13 x 7 400 000 000

                              = 9.62 x 10 ¹⁰ in

Convert in to miles

                     1 mile  --------------- 63360 in

                     x mi     ---------------  9.62 x 10 ¹⁰  in

     x = 1518308.1 mi

Now divide, the line of people by the circumference

         # of times =  1518308.1 mi /  25000 mi = 60.7                          

3 0
3 years ago
Tyger is trying to eat less sugar in his diet.He reduces his sugar intake from 15 spoons a day to 9 1/2 spoons a day. What is th
seraphim [82]

Answer:the percentage decrease is 36.67%

Step-by-step explanation:

Initial amount of sugar in his diet is 15 spoons in a day. Currently, the amount of sugar in his diet is 9 1/2 spoons in a day. Converting to decimal, it becomes 9.5 spoon in a day. The amount by which he reduced his sugar intake is 15 - 9.5 = 5.5 spoons.

Percentage decrease would be expressed as

Amount by which the intake decreased/ initial intake × 100

It becomes

5.5/15 × 100 = 36.67%

8 0
3 years ago
What is the height of the tree?
katrin [286]

Answer:

66m

Step-by-step explanation:

the smaller triangle has to have the same ratio as the bigger triangle

6/10 = x /110

6*110 / 10 = 66

3 0
3 years ago
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