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3 years ago

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Compare 2 × (66 + 82) and . A. 2 × (66 + 82) is twice as much as . B. 2 × (66 + 82) is four times as much as . C. is four times

as much as 2 × (66 + 82). D. 2 × (66 + 82) is half as much as .

1 answer:

valentinak56 [21]3 years ago

8 0

Answer:

the answer is B

Step-by-step explanation:

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If p is a point with polar coordinates (r,thetaθ), the rectangular coordinates (x,y) of p are given by xequals=_______ and y

Anuta_ua [19.1K]

Answer:

x = r cos theta and y = r sin theta

Step-by-step explanation:

cos theta = x / r so:-

x = r cos theta

and sin theta = y / r, so

y = r sin theta

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3 years ago

A rectangle has a length of (x + 4) centimeters and a width of 12x centimeters. If the perimeter is 26 centimeters, what is the

STALIN [3.7K]

Answer:

The width of rectangle is $W=\frac{108}{13}\ cm$ or $8\frac{4}{13}\ cm$

Step-by-step explanation:

we know that

The perimeter of rectangle is equal to

$P=2(L+W)$

where

L is the length of rectangle

W is the width of rectangle

we have

$P=26\ cm\\L=(x+4)\ cm\\W=12x\ cm$

substitute

$26=2(x+4+12x)$

solve for x

$26=2(13x+4)$

$26=26x+8$

$26x=26-8$

$26x=18$

$x=\frac{18}{26}$

simplify

$x=\frac{9}{13}$

<em>Find the width of rectangle</em>

$W=12x\ cm$

substitute the value of x

$W=12(\frac{9}{13})=\frac{108}{13}\ cm$

Convert to mixed number

$\frac{108}{13}\ cm=\frac{104}{13}+\frac{4}{13}=8\frac{4}{13}\ cm$

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3 years ago

If three times a number added to 8 is divided by the number plus 7, the result is four thirds. Find the number.

Marina86 [1]

9514 1404 393

Answer:

4/5

Step-by-step explanation:

The wording is ambiguous, as it often is when math expressions are described in English. We assume you intend ...

$\dfrac{3n+8}{n+7}=\dfrac{4}{3}\\\\3(3n+8)=4(n+7)\qquad\text{multiply by $3(n+7)$}\\\\9n+24=4n+28\qquad\text{eliminate parentheses}\\\\5n=4\qquad\text{subtract $4n+24$}\\\\\boxed{n=\dfrac{4}{5}}\qquad\text{divide by 5}$

The number is 4/5.

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3 years ago

Please answer this fast

Inessa [10]

Answer:

Step-by-step explanation:

23x-12-4x+5x

24x-12 combine the 23x-4x+5x to get 24x

19-14+3x+12x

15x+5 19-14=5 3x+12x=15x

6x+19-14x+9

-8x+28 -14x+6x= -8x 19+9=28

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3 years ago

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Find the equation of a line that is perpendicular to a line whose equation is 6x - y = -1 and passes through the point ( -1, 5 )

Svet_ta [14]

-y=-6x-1
-1(-y=-6x-1)
y=6x+1
5=6(-1)+b
5=-6+b
b=11

y-1/6x+11

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3 years ago