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2 years ago

PLEASE HELP. i'll give you brainliest !! AND PLS show work.

Mathematics

2 answers:

kondor19780726 [428]2 years ago

8 0

Answer:

Step-by-step explanation:

The x value of the center of the circle is negative, so it should be positive in the equation. That rules out numbers 1 and 3. Also, the number on the right side of the equation should be the square of the radius. That rules out 1 and 2, because the circle can be seen to have a radius of 3, therefore making the number on the right side of the equation equal to 3 squared or 9. This leaves us with equation number 4, which is the correct answer.

Lelechka [254]2 years ago

8 0

Answer:

Step-by-step explanation:

supersciencestudy has the brainliest answer

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If you have 2 squares with the same side lengths are they still considerd scaled copies of each other?

Mekhanik [1.2K]

Yes as long as one side on a square is the same on another they are the copies of each other

7 0

2 years ago

Use matrix inversion to solve the collection of systems of linear equations. HINT [See Example 4.] (a) −x − 4y + 2z = −10 x + 2y

omeli [17]

Answer:

Step-by-step explanation:

given is a system of linear equations in 3 variables as

$-x - 4y + 2z = −10\\ x + 2y - z = 11 \\x + y - z = 14$

This can be represented in matrix form as

AX=B Or

$\left[\begin{array}{ccc}-1&-4&2\\1&2&-1\\1&1&-1\end{array}\right] *\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}-10\\11\\14\end{array}\right]$

So solution set

X would be $A^{-1} B$

|A|=-1(-1)+4(0)+2(-1)=--1

Cofactors of A are

-1 0 -1

-2 -1 -3

0 1 2

So inverse of A is

1 2 0

0 1 -1

1 3 -2

Solution set would be

x=12

y=-3

z=-5

8 0

2 years ago

Which shows the expression below simplified? 0.00048 - (3.4 × 10-5) A. 4.46 × 10-4 B. 3.39952 × 10-5 C. 4.46 × 10-5 D. 1.4 × 10-

MakcuM [25]

Option C

The simplified form of given expression is $4.46 \times 10^{-4}$

Solution:

Given that we have to simplify the expression shown below

$0.00048 - (3.4 \times 10^{-5})$

Let us first convert 0.00048 to scientific notation

Steps to follow:

Move the decimal point in your number until there is only one non-zero digit to the left of the decimal point. The resulting decimal number is a.

Count how many places you moved the decimal point. This number is b.

If you moved the decimal to the left b is positive.

If you moved the decimal to the right b is negative.

If you did not need to move the decimal b = 0.

Write your scientific notation number as a x 10^b and read it as "a times 10 to the power of b."

Remove trailing 0's only if they were originally to the left of the decimal point.

$0.00048 = 4.8 \times 10^{-4}$

So the given expression becomes,

$\rightarrow 4.8 \times 10^{-4} - 3.4 \times 10^{-5}$

Let us make the exponent of second term as -4

$\rightarrow 4.8 \times 10^{-4} - 0.34 \times 10^{-4}$

Take $10^{-4}$ as common term,

$\rightarrow 10^{-4} (4.8 - 0.34)$

$\rightarrow 4.46 \times 10^{-4}$

Thus option C is correct

7 0

2 years ago

Multiply and simplify: -3x^2y^2 times x^4

pishuonlain [190]

It's the first answer choice.
Steps:
-3x^2y^2x^4
(Apply the exponent rule)
x^4x^2 = x^2+4 = x^6

= -3x^6y^2

8 0

3 years ago

NEED HELP ASAP NO LINKS!!!!!!!!!!!!!!!!!!!!!!On the first day it was posted online, a music video got 1500 views. The number of

timofeeve [1]

Answer:Answer: the total number of views that the video got over the course of the first 27 days is 718833

Step-by-step explanation:

The number of views that the video got each day increased by 18% per day. It means that the number of views is increasing in geometric progression. The formula for determining the sum of n terms(days), Sn of a geometric sequence is expressed as

Sn = (ar^n - 1)/(r - 1)

Where

n represents the number of terms(days) in the sequence.

a represents the first term in the sequence.

r represents the common ratio.

From the information given,

a = 1500

r = 1 + 18/100 = 1.18

n = 27 days

Therefore, the sum of the first 27 terms, S27 is

S27 = (1500 × 1.18^(27) - 1)/1.18 - 1

S27 = (1500 × 86.26)/0.18

S27 = 718833

Hopefully It helps:)

4 0

2 years ago