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4 years ago

What is 6x(13-6) =7 squared?

2 answers:

6 0

The first step is to multiply the "6X" by what is inside the brackets. This gives you 78X - 36X = 7²

7²= 7X7 = 49

Next simplify the equation 78X-36X= 42X
So 42X = 49
Divide both sides by 42 to get X= 1.1666666...

(The 6 is recurring)

Novay_Z [31]4 years ago

4 0

6 × (13 - 6) = 42, not 7, but 7² is 49 and 42² is 1,764.
I hope this helps!

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Ricing & Sales Math Quiz

marta [7]

Answer:

b) $52.33

Step-by-step explanation:

(For bid 3 I think you meant $55)

50+52+55 = 157

157/3 = 52.33(.33 repeating)

Which rounds to $52.33

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3 years ago

You ride the subway about 45 times per month. should you buy the monthly pass

exis [7]

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3 years ago

What is the solution of x+8/5x-1>0?

DerKrebs [107]

Answer:

x<-8 or x>1/5

Step-by-step explanation:

$\frac{x+8}{5x-1} >0$

First we replace > symbol by = sign

$\frac{x+8}{5x-1} =0$

To solve for x we multiply 5x-1 on both sides

x+8 =0

x=-8

5x-1=0 solve for x

x= 1/5

WE got two values x=-8 and x= 1/5

Now we make a number line and check with each interval

x<-8, -8<x<1/5, x>1/5

Pick x= -9 and check with the given inequality

$\frac{-9+8}{5(-9)-1} >0$

1/46 >0 is true, so x<-8 satisfies our inequality

Pick x= 0 and check with the given inequality

$\frac{0+8}{5(0)-1} >0$

-8 >0 is false , -8<x<1/5 does not satifies our inequality

Pick x= 2 and check with the given inequality

$\frac{2+8}{5(2)-1} >0$

10/9>0 is true , x>1/5 satisfies our inequality

3 0

3 years ago

Read 2 more answers

Linear Algebra: Permutation Matrices Let M be the matrix {{0,0,0,1,0}, {0,0,1,0,0}, {0,1,0,0,0}, {0,0,0,0,1}{1,0,0,0,0}}. What i

FromTheMoon [43]

Multiplying M by any matrix A would return new matrix, B, in which

• the 1st row of B is equal to the 4th row of A,

• the 2nd row of B is equal to the 3rd row of A,

• the 3rd row of B is equal to the 2nd row of A,

• the 4th row of B is equal to the 5th row of A, and

• the 5th row of B is equal to the 1st row of A.

The pattern here is

1 => 4 => 5 => 1

2 => 3 => 2

Let {4, 3, 2, 5, 1} denote the matrix M, where each number refers to the row of the identity matrix, I.

Using this notation, the pattern above gives

M² = {5, 2, 3, 1, 4}

M³ = {1, 3, 2, 4, 5}

M⁴ = {4, 2, 3, 5, 1}

M⁵ = {5, 3, 2, 1, 4}

M⁶ = {1, 2, 3, 4, 5}

so that <em>n</em> = 6.

(Notice that the first cycle has length 3 and the second one has length 2; the minimum <em>n</em> needed here is then LCM(2, 3) = 6.)

6 0

3 years ago

Pls answe quick and correctly

andriy [413]

Answer:

9890

Step-by-step explanation

7×43×30+5×4×43=9890

4 0

2 years ago