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2 years ago

PLEASE HELP ME ASAP ITS DUE AT MIDNIGHT AND I DONT HAVE A LOT OF TIME

Mathematics

2 answers:

Ne4ueva [31]2 years ago

4 0

Answer:

Step-by-step explanation:

Marrrta [24]2 years ago

3 0

Answer:

3.75

Step-by-step explanation:

21/8/7/2

=4/5*5

=3.75

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Show work and explain with formulas.

3241004551 [841]

14 Answer: 28

Step-by-step explanation:

$S_\infty=\dfrac{a_1}{1-r}\\\\\sum\limits^\infty_{n=1} 35\bigg(-\dfrac{1}{4}\bigg)^n\implies a_1=35,\ r=-\dfrac{1}{4}\\\\\\S_\infty=\dfrac{35}{1-\bigg(-\dfrac{1}{4}\bigg)}=\dfrac{35}{\dfrac{5}{4}}=35\times \dfrac{4}{5}=7\times 4=\large\boxed{28}$

15A Answer: 49

Step-by-step explanation:

$S_n=\dfrac{a_1+a_n}{2}\cdot n\\\\\\\sum\limits^7_{i=1} i+3\\\\a_1=1+3\quad =4\\a_7=7+3\quad =10\\n=7\\\\\\S_7=\dfrac{a_1+a_7}{2}\cdot 7\\\\\\.\ =\dfrac{4+10}{2}\cdot 7\\\\\\.\ =\dfrac{14}{2}\cdot 7\\\\\\.\ =7\cdot 7\\\\.\ =\large\boxed{49}$

15B Answer: 12

Step-by-step explanation:

$S_n=\dfrac{a_1+a_n}{2}\cdot n\\\\\\\sum\limits^{10}_{k=3} k-5\\\\a_3=3-5\quad =-2\\a_{10}=10-5\quad =5\\n=8\\\\\\S_8=\dfrac{a_3+a_{10}}{2}\cdot 8\\\\\\.\ =\dfrac{-2+5}{2}\cdot 8\\\\\\.\ =\dfrac{3}{2}\cdot 8\\\\\\.\ =3\cdot 4\\\\.\ =\large\boxed{12}$

16 Answer: $\sum\limits^5_{n=1} 3n-2$

Step-by-step explanation:

$\{1, 4, 7, 10, 13\}\implies a_1=1,\ d=3,\ n=5\\\\\text{The explicit rule for an arithmetic sequence is: }a_n=a_1+d(n-1)\\\\a_n=1+3(n-1)\\\\.\ =1+3n-3\\\\.\ =3n-2\\\\\large\boxed{\sum\limits^5_{n=1} 3n-2}$

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3 years ago

I don’t even know how to answer this lol it’s too early for me. So confused plz help

d1i1m1o1n [39]

Answer:

132

Step-by-step explanation:

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2 years ago

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Rational function f(x)=5-x/x^2+5x+6 f(x)=3

Lemur [1.5K]

Answer:

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Step-by-step explanation:

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2 years ago

I need to know how to find the perimeter please.

shutvik [7]

First, take all the sides you already have, then add them up. (You should get 12) To find the other two sides, do some more simple addition. The 2+3+2 of the the top side add up to six (the bottom side) and sides equal each other so add another three. Total is 12+6+3=21

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Which of these equations represents a line parallel to the line 2x + y = 6?

laila [671]

Answer:

D) y= -2X+1

Step-by-step explanation:

All of the lines are perpendicular to the line 2x+y=6 except for D) y= -2X+1.

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2 years ago