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liberstina [14]
3 years ago
9

I will mark Brainliest

Mathematics
2 answers:
gladu [14]3 years ago
8 0
I think its  A = 4π(7)2
valentinak56 [21]3 years ago
8 0
I think that the answer is the last one, 4 pi (7)2 because if the radius of the sphere is 7 feet than this equation works the best as 4 * pi * 7^2 = 49*4*pi=196 pi= 615.75ft^2 or 615.75 ft squared.
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Rudik [331]

Answer:

Step-by-step explanation:

804.25mm

8 0
3 years ago
Please help solve this
Drupady [299]

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Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
25 POINTS
Semenov [28]

If the slope of AB = CD and BC = AD it's a parallelogram:

Slope of AB = 6+1 / -9+5 = -7/4

CD = -2-5 / 3+1 = -74

These are equal.

BC = 5-6 / -1 +9 = -1/8

AD = -2 +1 / 3+5 = -1/8

These are also equal so it is a parallelogram.

Now to find if the diagonals are perpendicular find the slope of the perpensicular points:

AC = 5 +1 / -1 +5 = 6/4 = 3/2

BD = 6+2 / -9 -3 = 8/-12 = -2/3

Because BD is the reciprocal of AC, this means they are perpendicular.

And because AB is not perpendicular to AD ( AB and AD are not reciprocals) it is a rhombus.

5 0
3 years ago
Solve the system of linear equations using the elimination method x=3y;3x-2y=14
vladimir1956 [14]

Answer:

<h2>x = 6 and y = 2 → (6, 2)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x=3y&\text{subtract}\ 3y\ \text{from both sides}\\3x-2y=14\end{array}\right\\\\\left\{\begin{array}{ccc}x-3y=0&\text{multiply both sides by (-3)}\\3x-2y=14\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-3x+9y=0\\3x-2y=14\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad7y=14\qquad\text{divide both sides by 7}\\.\qquad\qquad y=2\\\\\text{put the value of y to the first equation:}\\x=3(2)=6

7 0
3 years ago
Need help please I don’t get it
shutvik [7]

Answer:

question is not clear and I think you are doing cheating in this test

7 0
2 years ago
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