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photoshop1234 [79]
3 years ago
9

Need help rn on a test​

Mathematics
1 answer:
Maksim231197 [3]3 years ago
6 0

Answer:

The answer is -6

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Mark<br> used 6428 blocks build a castle round the number of block to the nearest tens
BARSIC [14]

Answer:

6430

Step-by-step explanation:

round up your 1's digit to 10 and carry your one from the 10 over to the 2 in the tens place, you then add the 1 from the 10 to the 2 in the tens spot and that's how you get ur answer

5 0
3 years ago
A circle passes through point (-2, -1) and its center is at (2, -1). Which equation represents the circle?
ludmilkaskok [199]

The choices are missing, but we can solve the problem from the given information

Answer:

The equation which represents the circle is (x - 2)² + (y + 1)² = 16

Step-by-step explanation:

The form of the equation of a circle is (x - h)² + (y - k)² = r², where

  • (h , k) are the coordinates of its center
  • r is the radius of it

∵ The coordinates of the center of the circle are (2 , -1)

∴ h = 2 and k = -1

The radius of the circle is the segment whose join the center of the circle and any point on the edge of the circle

∵ The circle passes through point (-2 , -1)

∴ The radius of the circle is the distance from the center (2 , -1)

    and the point (-2 , -1)

The y-coordinates of the two points are equal that means the radius is a horizontal segment and its length is the difference between their x-coordinates

∵ r = 2 - (-2)

∴ r = 4

Now let us substitute h, k, and r in the form of the equation of the circle

∵ (x - 2)² + (y - -1)² = (4)²

∴ (x - 2)² + (y + 1)² = 16

The equation which represents the circle is  (x - 2)² + (y + 1)² = 16

7 0
3 years ago
A drop of oil measuring 0.23 cubic centimeters is spilled into a lake. The oil spread out into a circular shape having a diamete
Kaylis [27]
To determine the thickness of the film, we assume the shape of the film is in a form of cylinder where the thickness is equal to the height. The volume of a cylinder is expressed as:

V = pi (r^2) h

We calculate as follows:

0.23 = pi (10^2) (h)
h = 0.0007 cm
7 0
3 years ago
What is the length of segment DB?
tatyana61 [14]
I believe it’s 82

8x=3x+8+4x+10
x=18

4•18+10=72+10=82
3 0
3 years ago
What is the written form of the decimal number .954? A. Nine and fifty-four thousandths B. Nine hundred fifty four hundredths C.
Sladkaya [172]
The answer is B because its 9 hundred and thousandths is the smallest place
7 0
3 years ago
Read 2 more answers
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