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avanturin [10]
3 years ago
11

I need help for number 49

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
8 0
I'm thinking it's B for that question
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Alex and Jose are working on some math problems.
Volgvan

Answer:

Alex is right so the problem is solved

4 0
3 years ago
In trapezoid ABCD, points M and N are arbitrary points on bases AB and CD respectively. Find the area of the trapezoid, if area
mel-nik [20]

Remark

This is quite a nice little problem. It takes a minute or three to figure out the answer, and when you do, you will be certain that you have been tricked. It is a little like the egg of Columbus.

Solution

The Base of Triangle ABN is AB

The Base of Triangle CDM is CD

The height of both given triangles is h. That is the distance between the two parallel lines.

Area ABN = 1/2*AB * h = 23 cm^2

Area CDM = 1/2*CD * h = 18 cm^2

Now the Area of the trapezoid is

Area_Trapezoid = 1/2 * h (AB + CD)     Using the distributive property Remove the brackets.

Area_Trapezoid = 1/2*AB*h + 1/2*CD*h Did you notice something? Those terms are just the area of the triangles (written above.)

Area Trapezoid = 23 + 18 = 41 cm^2 <<<< Answer

6 0
3 years ago
Help me with this please!!!!!!!!!!!!!
Mademuasel [1]

Answer:

1mm

cos(60)= 1/2

1/2 x 2 = 1

1 mm

5 0
3 years ago
What is the ratio of 420m to 1 km
suter [353]

Answer:

21/50 or 21:50

Step-by-step explanation:

1km = 1000m

That means one meter is equal to 1/1000 of a km.

420 meters is 420/1000 of a km which is equal to 42/100 = 21/50 or 21:50

Is it right?

Also can I have Brainiest

7 0
3 years ago
Read 2 more answers
Explain how a number and it's reciprocal are related adding 28 ?
asambeis [7]
<span>Step 1. Let x be the number and 1/x be its reciprocal.

Step 2. Then, since the sum of a number and its reciprocal is 25/12.

Step 3. Multiply 12x to both sides of the equation to get rid of the denominators.





Step 4. Subtract 25x to put the equation in quadratic form </span>
4 0
3 years ago
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