Plz help me with this!!

Mathematics

1 answer:

maria [59]3 years ago

8 0

Assuming early termination, Alice's fixed costs are $200 for the phone and $175 for the fee, for a total of $375. Her variable cost is $50 per month. Her total cost is ...
b. y = 50x + 375

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Every ninth person in line at a movie theater gets free popcorn. Every sixth person gets free apple juice. Shani says that the t

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It is right, because 36 is dividable by 6 and 9 (haha thats the funny number)

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Item 16 Solve the equation. −4/9f=−3

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The answer is f= $\frac{4}{27}$

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For an arithmetic sequence, a35=57. If the common difference is 5. Find a1 and the sum of the first 61 terms.

Flauer [41]

$\displaystyle\bf\\a_{35}=57\\r=5\\----\\a_1=?\\S_{61}=?\\----\\Solve:\\1)\\a_1=a_{35}-(35-1)\times r=57-34\times 5=57-170=-113\\\boxed{\bf a_1=-113}\\\\$

$\displaystyle\bf\\2)\\A_{61}=a_1+(61-1)\times r=-113+60\times5=-113+300=187\\\\S_{61}=(-113)+(-108)+(-103)+...+(-8)+(-3)+2+7+12+...+187\\\\S_{61}=SA+SB\\\\SA=(-113)+(-108)+(-103)+...+(-8)+(-3)=-(3+8+103+108+113)\\\\n=\frac{113-8}{5}+1=\frac{105}{5}+1=21+1=22~terms\\SA=-\Big( \frac{n(113+3)}{2} \Big)=-\Big( \frac{22\times116}{2} \Big)=-11\times116 =-1276$

$\displaystyle\bf\\SB=2+7+12+...+187\\\\n=\frac{187-2}{5}+1=\frac{185}{5}+1=37+1=38~terms\\\\SB=\frac{n(187+2)}{2}=\frac{38\times189}{2}=19\times189=3591\\\\S_{61}=SA+SB=-1276+3591=2315\\\\\boxed{\bf S_{61}=2315}$

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Area and Perimeter of a rectangle that is 92 meters long and 18 meters wide

tensa zangetsu [6.8K]

a= 92(18) =1656

Area= 1656m

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Perimeter= 220m

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3 years ago

( 2 + 7 -14 Turn over

Viefleur [7K]

Answer:

Step-by-step explanation:

2 + 7 - 14 flipped around =

14 - 7 + 2 =

7 + 2 =

Hope that helps! :)

-Aphrodite

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