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liberstina [14]
3 years ago
14

Could someone help me really quick!

Mathematics
2 answers:
vampirchik [111]3 years ago
8 0
A is the answer to the problem
NeX [460]3 years ago
5 0
The triangles are similar triangles, so the proportion of the corresponding sides are the same.

Make a comparison.
\dfrac{\text{hypotenuse}}{\text{upright side}} = \dfrac{\text{hypotenuse}}{\text{upright side}}

In this case, you can input the numbers as follows.
\dfrac{x}{2}= \dfrac{54}{12}

Solve for x
Move 2 to the right side, and 2 will be a numerator
x = \dfrac{54(2)}{12}
x = \dfrac{108}{12}
x = 9

The value of x is 9, the answer is first option
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Pyramids and cones (finding surface area). Please help!
zimovet [89]
For the first one

notice, the pyramid is just 4 triangles and one square, stacked up to each other at the edges

now, for the first one, you have a square 4x4 and four triangles or base 4 and height of 6

bear in mind, the pyramids are called "regular pyramids" because their base is a regular polygon, meaning, a polygon with all equal sides, in this case a quadrilteral, or a square

---------------------------------------------------------------------------------------

now for the second one

you have the height of the pyramid, but not the slant-height, which will be the height of the triangular face

thus... check the picture below, using the pythagorean theorem, you can just get the height of the triangular face then

now, the base of the triangles are all 22
and the base of the pyramid is a 22x22 square

---------------------------------------------------------------------------------------

now, for the third one

same as the first one really, you have both, the base and slant-height, which will be the height of the triangular face

so, four triangles with a base of 6 and a height of 9, and a square on the base of 6x6

so... get the area of all four triangles, and the squarish base, sum them up, and that's the surface area of the pyramid

7 0
3 years ago
Three fifths of the children in a school are boys. 7/8 of the girls in the school are right-handed. What fraction of the childre
Kaylis [27]

Answer:

To find the answer we only need to know,

Total no.of girls and Total no.of right handed girls.

So,

Total no.of right handed girls = 7/8

Total no.of girls                        = 8/8 (as given in question)

Total no.of left handed girls is,

(Fraction of total no.of girls) - (Fraction of total no.of left handed girls)

= 8/8 - 7/8

= 1/8

∴ 1/8 of the girls in the school are left handed.

7 0
3 years ago
What is the nearest thousand place for 3,429
muminat
If the place to the right of where you are rounding is 5 or higher, you have to round up. If it is 4 or lower, you have to round down. In the hundreds place, there is a 4. That's lower than 5 meaning that you round down/stay. So, the nearest thousands place is 3,000.
8 0
3 years ago
Find the area of EBCD using (a) and (b).
ioda

I hope this helps you

6 0
3 years ago
Helppo please<br> PLSS<br><br> PLSS
soldi70 [24.7K]
Answer:m1=-3,m2=3 the equation has 2 solutions
7 0
3 years ago
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