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ivolga24 [154]
3 years ago
11

What is the best estimate length of a football

Mathematics
1 answer:
Ne4ueva [31]3 years ago
5 0
11 to 11.2 inches Is an estimate length of a football
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Consider the vector add = a + b = [13 12 11 10 10] and sub = a - b = [-11 - 6 - 14 8]. Find the vector a and b.
prisoha [69]

Answer:

a = [1   3   5   7   9] and b = [12   9   6   3   1]

Step-by-step explanation:

The addition of two vectors a and b is defined as

a + b = [13   12   11   10   10]                .... (1)

The subtraction of two vectors a and b is defined as

a - b = [-11   - 6   - 1   4    8]                 .... (2)

After adding (1) and (2), we get

(a + b) + (a - b)= [13   12   11   10   10] + [-11   - 6   - 1   4    8]

On simplification we get

2a = [13-11   12-6   11-1   10+4   10+8]

2a = [2   6   10   14   18]

Divide both sides by 2.

a = [1   3   5   7   9]

Substitute the value of vector a in equation (1).

[1   3   5   7   9] + b = [13   12   11   10   10]

Subtract vector a from both sides.

b = [13   12   11   10   10] - [1   3   5   7   9]

On simplification we get

b = [13-1   12-3   11-5   10-7   10-9]

b = [12   9   6   3   1]

Therefore the vectors a and b are defined as a = [1   3   5   7   9] and b = [12   9   6   3   1].

4 0
3 years ago
A.) it has no reflectional symmetry
coldgirl [10]

Answer:

D.) It has rotational symmetry with an angle of rotation of 90 degrees.

Step-by-step explanation:

i) the shape shown in the figure has reflectional symmetry with four lines of symmetry. There are four lines of symmetry such that each line when drawn divides the shape into two exact halves such that if each half were too be folded across the line of symmetry it would produce the other half exactly.

Therefore Option A.) and Option B.) are not true

ii) It has  point symmetry which means if the shape is rotated by 180 degrees the shape does not change. Therefore Option C.) is not true.

iii) the shape has rotational symmetry because if the shape is rotated though any between 0 degrees and 360 degrees the shape appears to be unchanged.

Therefore the correct options are

D.) It has rotational symmetry with an angle of rotation of 90 degrees.

5 0
3 years ago
The sum of these fractions is between which two whole numbers?
kherson [118]
3 4/6 + 1 3/6 = 4 7/6 = 5 1/7
Therefore the answer is B. the sum is between 5 and 6

Hope that helps
4 0
3 years ago
Read 2 more answers
Lines or points that do not lie on the same surface or plane.
Leokris [45]
Collinear Points: points that lie on the same line. Coplanar Points: points that lie in the same plane. Opposite Rays: 2 rays that lie on the same line, with a common endpoint and no other points in common.
8 0
3 years ago
Read 2 more answers
Y-3=-3y-43 show the work
Bumek [7]

Answer:

y = - 10

Step-by-step explanation:

Given

y - 3 = - 3y - 43 ( add 3y to both sides )

4y - 3 = - 43 ( add 3 to both sides )

4y = - 40 ( divide both sides by 4 )

y = - 10

8 0
3 years ago
Read 2 more answers
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