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raketka [301]
3 years ago
5

Please help need answer

Mathematics
1 answer:
Len [333]3 years ago
7 0

Answer:

B

Step-by-step explanation:

When there is only rotation and reflection, there is no change in size. A change in size occurs when there is dilation.

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Simplify.<br><br> 6x+4y-4x+5y+5
riadik2000 [5.3K]

Answer:

2x + 9y + 5

Step-by-step explanation:

Combine like terms:

(6x - 4x) + (4y + 5y) + 5

2x + 9y + 5

5 0
3 years ago
Can someone give me an example of transformation of electrical to mechanical energy
astra-53 [7]

Answer:

i need this for a challenge

Step-by-step explanation:

8 0
3 years ago
Find the equation of the sphere passing through P(negative 4 comma 7 comma 6 )and Q(8 comma negative 3 comma 5 )with its center
Juli2301 [7.4K]

Answer: The equation of the sphere is:

(x-2)^2 + (y-2)^2 + (z-5/2)^2 = sqrt(245)/2

Step-by-step explanation:

The centre of the sphere is the midpoint of the diameter, which is

1/2

[(-4,7,6) + (8,-3,5)] =(2,2,5/2)

The length of the diameter is

=sqrt |(8,-3,5) - (-4,7,6)|^2

=sqrt (12^2 + (-10)^2 + (-1)^2)

=sqrt (144+100+1)

=sqrt(245)

so the radius of

the sphere is:

1/2(sqrt(245)) = sqrt(245)/2.

The equation of the sphere is:

(x-2)^2 + (y-2)^2 + (z-5/2)^2 = sqrt(245)/2

4 0
3 years ago
Allen wants to have a mean of 90 on his math quizzes. So far, he has scored 86, 94, 88, 95, and 89. What is the least score that
viva [34]

Answer:

88

Step-by-step explanation:

\frac{86 + 94 + 88 + 95 + 89 + x}{6}  = 90

The mean would be the sum of all the math quiz grades divided by the number of quizzes taken.

Solve for x:

86 + 94 + 88 + 95 + 89 + x = 540

452 + x = 540

x = 88

Thus, Allen needs at least an 88 to obtain a mean of at least 90.

3 0
3 years ago
A circle's radius is 25 inches.
Stella [2.4K]

Answer:

C≈157.08in

Step-by-step explanation:

C=2πr=2·π·25≈157.07963in

5 0
3 years ago
Read 2 more answers
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