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Aleks04 [339]
2 years ago
8

I don't know how to solve this 2/4 + 3/8=?​

Mathematics
2 answers:
algol [13]2 years ago
6 0

Answer:

7/8

Step-by-step explanation:

look it up

your wel3

stellarik [79]2 years ago
5 0

Answer: \frac{7}{8} or 0.875 in decimal form.

Step-by-step explanation:

Okay, so to solve this, the easiest method is to find a common denominator. While we could try using trial and error or if you know your tables really well, I don't so we will just multiply the denominators which is 8 and 4. We then multiply 8 and 4 which is 32.

To convert the fractions we have, we multiply both the numerator and denominator of each, by the multiple that multiplies the denominator to 32.

\frac{2}{4} multiply both 4 and 2 by 8. Now we have \frac{16}{32}.

Same thing with the second number. We have \frac{3}{8}. We multiply both the numerator and the denominator by 4. 3*4 is 12, 8*4 is 32.

Now we have \frac{12}{32}.

Now that both fractions have common denominators, we can add the numerators. \frac{16}{32} +\frac{12}{32} = \frac{28}{32}

Now we have the answer, \frac{28}{32}, but is that it?

No. Now to find the final two answers, we simply \frac{28}{32}.

To simplify, we find the Greatest Common Factor of 28 and 32, which in this case happens to be 4. This is the highest number that either of those can be divided by to provide a normal whole number

After solving \frac{28/4}{32/4} =\frac{7}{8}

That is our final answer. \frac{7}{8}.

If necessary, you can convert it to decimal form through simple division and end up with 0.875.

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3 years ago
A fire department's ladder is 110 feet long. A firefighter is trying to reach the top of a 100 foot building by leaning the ladd
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Answer:

sin-¹(10/11)

Step-by-step explanation:

The height of the building is 100 ft and the ladder is 110ft long .We can imagine this situation as a right angled ∆. For figure refer to the attachment .

  • We can use ratio sine here. Let the angle of elevation be theta.

<u>In </u><u>∆</u><u> </u><u>ABC </u><u>:</u><u>-</u><u> </u>

=> sinθ = p/h

=> sinθ = 100ft / 110 ft

=> sinθ = 10/11

=> θ = sin -¹ ( 10/11) .

<h3><u>Hence </u><u>the</u><u> </u><u>angle</u><u> of</u><u> elevation</u><u> </u><u>is </u><u>sin </u><u>-</u><u>¹</u><u> </u><u>(</u><u> </u><u>1</u><u>0</u><u>/</u><u>1</u><u>1</u><u>)</u><u>. </u><u> </u></h3>

6 0
3 years ago
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Pavel [41]

Answer: T (The first option).


Step-by-step explanation:

1. By definition, coplanar points are three or more points that are in the same plane.

2. Based on this information, as you can see in the figure attached, the points A, C, D, E, S and U are coplanars because they are in the same plane, which is: ACDE.

3. Therefore, you can conclude that the point T is not coplanar with points A, C and D because this is not in the plane ACDE.


3 0
3 years ago
The cone and cylinder above have the same radius, r, and height, h. The volume of the cone is 69 cubic centimeters. What is the
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Answer:

207 cubic centimeters

Step-by-step explanation:

Given

volume of cone  = 9 cubic centimeters

Since the cone and cylinder above have the same radius, r, and height, h, then r = h

volume of the cone = 1/3πr²h

69 =  1/3πr²h

πr²h = 69*3

πr²h = 207cubic cm

Since the volume of the cylinder =  πr²h

Hence volume of the cylinder is 207 cubic centimeters

8 0
3 years ago
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