All categories

3 years ago

Please help !!!!!!!!!!!!!!!!

Mathematics

1 answer:

irina [24]3 years ago

7 0

Answer:

Please refrain from posting duplicate questions.

Step-by-step explanation:

All Brainly users all need a fair chance at getting help on their questions too. Please refer to the brainly.com guidelines.

You might be interested in

Find a1, for the arithmetic series<br> with S14 = - 420 and d = -6.

faust18 [17]

$\bf n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} a_n=n^{th}\ term\\ n=\textit{term position}\\ a_1=\textit{first term}\\ d=\textit{common difference}\\ \cline{1-1} n = 14\\ d= -6 \end{cases} \\\\\\ a_{14}=a_1+(14-1)(-6)\implies a_{14}=a_1+(13)(-6)\implies a_{14}=a_1-78 \\\\[-0.35em] ~\dotfill$

$\bf \textit{sum of a finite arithmetic sequence} \\\\ S_n=\cfrac{n(a_1+a_n)}{2}\qquad \begin{cases} a_n=n^{th}\ term\\ n=\textit{last term's}\\ \qquad position\\ a_1=\textit{first term}\\ \cline{1-1} n= 14\\ S_{14}=-420\\ a_{14}=a_1-78 \end{cases}\implies S_{14}=\cfrac{n(a_1+a_{14})}{2} \\\\\\ -420=\cfrac{14[a_1+(a_1-78)]}{2}\implies -420=7(2a_1-78)\implies \cfrac{-420}{7}=2a_1-78 \\\\\\ -60=2a_1-78\implies 18=2a_1\implies \cfrac{18}{2}=a_1\implies 9=a_1$

8 0

3 years ago

What kind of transformation is shown in the picture?

german

I think your answer would be B

8 0

3 years ago

Read 2 more answers

The graph of a function must pass the __________ line test. <br> A) vertical <br> B) horizontal

olga2289 [7]

Answer:

A) Vertical.

Step-by-step explanation:

It must pass the vertical line test. That is it must not have any vertical line passing through more than one point on the curve. If it does then it is not a function.

Thus , for example, a circle graph would not be a function.

5 0

3 years ago

Read 2 more answers

What is the value of this expression when a=4, b=-5, and c=-7?

nasty-shy [4]

Answer: C. 6 1/6

Step-by-step explanation:

2 * -5 * -7 = -10 * -7 = 70

70 + 4 = 74

3 * 4 = 12

74/12 = 6 1/6

4 0

3 years ago

Is the following sentence true or False? Geologists are able to drill to the center of Earth

Andru [333]

Answer:

It is false the center of the Earth is way to hot for anyone to go down their if they do they will burn

Step-by-step explanation:

5 0

3 years ago