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prohojiy [21]
2 years ago
12

Plzzzzzzzzzzzzzzzz Helo Answer correct please but It can tell if the answer is wrong ​

Mathematics
2 answers:
Setler79 [48]2 years ago
7 0

Answer:

im pretty sure 20 seconds

Step-by-step explanation:

amid [387]2 years ago
6 0

Answer:

11.494 seconds

Step-by-step explanation:

I don't think you need to show work

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Simplify: (3x – 1) (x3 + 2x + 1)
pshichka [43]

Answer:

B: 3x4-x3+6x2+x-1

5 0
3 years ago
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Zachary is making dumplings. If he uses cup of dough for each dumpling, how
LekaFEV [45]

Answer:

11 cups of dough

Step-by-step explanation:

1 cup x 11 dumplings = 11 cups of dough needed

6 0
3 years ago
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Can someone help me with this question on Prodigy? ​
lions [1.4K]

Answer:

  8 +(3/8)√53 in² ≈ 10.73 in²

Step-by-step explanation:

Given the net of a triangular pyramid with some of the dimensions filled in, you want to find the total surface area.

<h3>Triangle base</h3>

The triangle bases identified by dashed lines will have a length equal to the hypotenuse of the right triangles with legs shown as solid lines. The legs of each of those right triangles are ...

  a = (3 in)/2 = 1.5 in

  b = 2 in . . . . . . shown as the altitude of the triangle

Then the hypotenuse is found using the Pythagorean theorem:

  c² = a² +b²

  c² = 1.5² +2² = 2.25 +4 = 6.25

  c = √6.25 = 2.5

The dashed lines are 2.5 inches long.

<h3>Triangle altitude</h3>

The altitude from the solid horizontal line to the vertex at the bottom of the figure can be found using the fact that all of the outside edge lengths of the net are the same length. That edge length is found as the length of the hypotenuse of the right triangles in the left- and right-sides of the upper portion of the net. Each of those has a leg that is (2.5 in)/2 = 1.25 in and a leg marked as 2 in.

  c² = a² +b²

  c² = 1.25² +2² = 1.5625 +4 = 5.5625

  c = (√89)/4 ≈ 2.358 . . . in

The unmarked altitude of the bottom triangle is then ...

  b² = c² -a²

  b² = 89/16 -1.5² = 53/16

  b = (√53)/4 ≈ 1.820 . . . in

<h3>Surface area</h3>

The surface area of the figure is the sum of the areas of the four triangles that make up the net. Each triangle has an area given by the formula ...

  A = 1/2bh

The left and right triangles have b=2.5, h=2, so they each have an area of ...

  A = 1/2(2.5)(2) = 2.5 . . . . in²

The center triangle has dimensions of b=3, h=2, so an area of ...

  A = 1/2(3)(2) = 3 . . . . in²

The bottom triangle has dimensions of b=3, h=(√53)/4, so an area of ...

  A = 1/2(3)(√53/4) = (3/8)√53 ≈ 2.730 . . . . in²

The total surface area is the sum of the areas of these triangles, so is ...

  A = 2.5 in² +2.5 in² +3 in² +2.73 in² = 10.73 in²

The surface area of the triangular pyramid is (64+3√53)/8 ≈ 10.73 in².

__

<em>Additional comment</em>

Often we work with pyramids that are rotationally symmetrical about a vertical line through the peak. This one is not. The altitude of the bottom triangle in the net is less than the altitude of the other triangles. This short face of the pyramid will tend to be more vertical than the other two lateral faces.

4 0
1 year ago
The expression −310+13m represents a submarine that began at a depth of 310 feet below sea level and ascended at a rate of 13 fe
GenaCL600 [577]

Answer:

206

Step-by-step explanation:

The formula for this problem would be -310 + 13(8) which = 206

3 0
3 years ago
Kelly made six batches of cookies. Her friends asked her to make an extra batch. She used 17 1/4 cups of sugar and needs another
bixtya [17]

Answer:

18 1/8

Step-by-step explanation:

Just simple fraction addition.

17 1/4+ 7/8

Make common denominator

17 2/8+7/8

17 9/8 which is 18 1/8

4 0
3 years ago
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