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Trava [24]
3 years ago
8

Danielle built a ramp with a stopping block at the bottom for her scout troop's pinewood derby. She wants to paint the top and s

ides of the ramp. Danielle calculated the area by adding the areas of 2 triangular faces and 3 rectangular faces from the ramp and 6 rectangular faces from the block. Did Danielle calculate the area correctly? If not, what was her mistake? A. Yes, Danielle calculated the area correctly. B. No, Danielle needs to remove 1 rectangle from the ramp and 1 rectangle from the block. C. No, Danielle needs to add 1 triangle to the ramp and remove 1 rectangle from the block. D. No, Danielle needs to remove 1 triangle from the ramp and add 1 rectangle to the block.
Mathematics
2 answers:
Jet001 [13]3 years ago
8 0

Answer:

  B.  No, Danielle needs to remove 1 rectangle from the ramp and 1 rectangle from the block.

Step-by-step explanation:

It is true that the ramp has 2 triangular and 3 rectangular surfaces, and the block has 6 rectangular surfaces. However, Danielle doesn't want to paint the bottom rectangular surface of either the ramp or the block, so needs to remove one rectangle from each for her area computation.

Murljashka [212]3 years ago
3 0

Answer:

B is your answer hope you have a wonderful day

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

3 0
3 years ago
Find the center of the circle: x2 + 2x - 3 + y2 = 5.
rosijanka [135]

Answer:

\boxed{(-1, 0)}

Step-by-step explanation:

x² + 2x - 3 + y²  = 5

Strategy:

Convert the equation to the centre-radius form:

(x - h)² + (y - k)² = r²

The centre of the circle is at (h, k) and the radius is r .

Solution:

Move the number to the right-hand side.

x² + 2x + y²  = 8

Complete the square for x

(Take half the coefficient of x, square it, and add to each side of the equation)

(x² + 2x + 1) + y² = 9

Complete the square for y

The coefficient of y is zero.

(x² + 2x + 1) + y² = 9

Express the result as the sum of squares

(x + 1)² + y² = 3²

h = -1; k = 0; r = 3

The centre of the circle is at \boxed{(-1,0)}

The graph of the circle below has its centre at (-1,0) and radius 3.

4 0
3 years ago
A jury pool consists of 50 potential jurors and how many ways can a jury of 12 be selected
bija089 [108]

Solution:

we are given that

A jury pool consists of 50 potential jurors.

Wee have been asked to find the number of ways can a jury of 12 be selected.

As we know from the concept of combination that r person can be selected out of n in ncr ways. where

n_C_r=\frac{n!}{r!(n-r)!}

Now substitute the values we get

{50}_C_{12}=\frac{50!}{12!(50-12)!}\\
\\
{50}_C_{12}=\frac{50!}{12!38!}\\
\\
{50}_C_{12}=121399651100\\

Hence the required number of ways is 121399651100

5 0
3 years ago
Please Help Will give 20 points
wariber [46]

600 +200 + 100 = 900

2000 - 900 = 1100

1100/6 = 183.33 so he can buy 183 games


8 0
3 years ago
Factor 70a + 50. Write your answer as a product with a whole number greater than 1
olga2289 [7]

Answer:

  10(7a +5)

Step-by-step explanation:

The greatest common factor of the two terms is 10. Factoring that out gives ...

  10(7a +5)

_____

Other possibilities for meeting the problem requirement are ...

  • 2(35a +25)
  • 5(14a +10)
3 0
3 years ago
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