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laila [671]
3 years ago
7

The perimeter of the rectangle below is 74 units. Find the length of side xy.

Mathematics
1 answer:
marusya05 [52]3 years ago
4 0
Bsnndnsndndnndndndndndndndn
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Find S5 for a geometric series for which a1=81 and r=1/9.
Minchanka [31]

ANSWER

S_5=91\frac{10}{81}




EXPLANATION


The sum of the first n terms of a geometric sequence is given by;


S_n=\frac{a_1(1-r^n)}{1-r} ,-1


Where n, is the number of terms and a_1 is the first term.


When n=5, we have a_1=81, we get;


S_5=\frac{81(1-(\frac{1}{9})^5)}{1-\frac{1}{9}}


S_5=\frac{81(1-\frac{1}{59049})}{1-\frac{1}{9}}


S_5=\frac{81(\frac{59048}{59049})}{\frac{8}{9}}




S_5=\frac{7381}{81}


S_5=91\frac{10}{81}




6 0
3 years ago
If mn, solve for x.<br> (3x + 9) (x + 21)
Sloan [31]

2

3x. + 63x + 9x + 189

Step-by-step explanation:

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6 0
3 years ago
If 400 dpi equals 3.6 and 800 equals 1.8. What does 1000 dpi equal to?
laiz [17]

Answer: The numbers are showing in descending order 3.6-1.8= 1.8 = 1.8 is half of 3.6 - therefore if 1200 is half again = 0.8 then what lies between 1.8 and 0.8?  Answer to 1000 is 0.8 +5 = 1.3

Step-by-step explanation:

5 0
3 years ago
Ellie wanted to know how much her mother spent on groceries weekly, so she saved each week's receipt for a whole year.
Aloiza [94]
Mean or c is the answer
7 0
3 years ago
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Write the equation of the line parallel to 2x - 6y = 12 that passes through the point ( -1, 4).​
vlada-n [284]

Answer:

y = 1/3x + 4 1/3

Step-by-step explanation:

2x - 6y = 12

First find the slope

Solve for y

Subtract 2x

2x - 6y -2x= 12-2x

-6y = -2x+12

Divide by -6

-6y/-6 =-2x/-6 +12/-6

y = 1/3 x -2

The slope is 1/3

Parallel lines have the same slope

Using the slope intercept form y = mx+b where m is the slope and b is the y intercept

y = 1/3x +b

And substituting in the point

4 = 1/3 (-1) +b

4 = -1/3 +b

Add 1/3 to each side

4 + 1/3 = b

y = 1/3x + 4 1/3

4 0
3 years ago
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