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egoroff_w [7]
2 years ago
12

Help maybe..? Please

Mathematics
2 answers:
Aleks [24]2 years ago
7 0

Answer:

15.8

Step-by-step explanation:

First we need to round to the nearest tenth.

18.134 rounds to 18.1 (since it's closer to 18.1 than 18.2)

2.28 rounds to 2.3 (since it's closer to 2.3 than 2.2)

Then we subtract

18.1-2.3=15.8

suter [353]2 years ago
5 0

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

The numbers after rounding off to 10th place is :

  • 18.134\rightarrow18.1
  • 2.28 \rightarrow2.3

now, their difference will be :

  • 18.1 - 2.3
  • 15.8

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Find+the+positive+value+for+α+if+the+radius+of+the+circle+3x^2+3y-6αx+12y-3α=0+is+4
Alik [6]

Answer:

\alpha=3

Step-by-step explanation:

<u>Equation of a Circle</u>

A circle of radius r and centered on the point (h,k) can be expressed by the equation

(x-h)^2+(y-k)^2=r^2

We are given the equation of a circle as

3x^2+3y^2-6\alpha x+12y-3\alpha=0

Note we have corrected it by adding the square to the y. Simplify by 3

x^2+y^2-2\alpha x+4y-\alpha=0

Complete squares and rearrange:

x^2-2\alpha x+y^2+4y=\alpha

x^2-2\alpha x+\alpha^2+y^2+4y+4=\alpha+\alpha^2+4

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We can see that, if r=4, then

\alpha+\alpha^2+4=16

Or, equivalently

\alpha^2+\alpha-12=0

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\alpha=-4,\ \alpha=3

Keeping the positive solution, as required:

\boxed{\alpha=3}

8 0
3 years ago
Solve for x in the equation x2+2x+1=17
agasfer [191]

The left side can be written as a square. We can take the square root, then subtract 1.

... (x +1)² = 17

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... x = -1 ±√17

6 0
3 years ago
Which side length for me a right triangle?
guajiro [1.7K]

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C

Step-by-step explanation:

8 0
3 years ago
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7 0
2 years ago
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Triangles DEF and D'E'F' are shown on the coordinate plane below: . . Triangle DEF and triangle D prime E prime F prime with ord
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<span><u><em>The correct answer is:</em></u>
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<u><em>Explanation: </em></u>
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<u> A 90</u></span></span><u>°</u><span><span><u> rotation clockwise</u> will map coordinates (x, y) to (y, -x), negating the x-coordinate and swapping the x- and y-coordinates.

Performing either of these would leave our image with a coordinate that needs negated, as well as needing to swap the coordinates back around. 

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4 0
2 years ago
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