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3 years ago

Can she get some help

Mathematics

2 answers:

rodikova [14]3 years ago

6 0

Answer:

Step-by-step explanation:

the formula for an arithmetic sequence that is explicit is

$a_n=a_1+d(n-1)$ where $a_1$ is the first term (so -1), and d is the common difference (-2). n is the number position in the sequence. As soon as we find the formula or model for this sequence we can find any number term we want. Filling in the formula:

$a_n=-1-2(n-1)$ and we'll clean that up just a bit:

$a_n=-1-2n+2$ (I just distributed through the parenthesis) and a bit more to

$a_n=-2n+1$ and if we want the 21st term, fill in a 21 for n:

$a_{21}=-2(21)+1$ and

$a_{21}=-42+1$ so

$a_{21}=-41$

Artemon [7]3 years ago

5 0

Answer:

-55

Step-by-step explanation:

the sqeuence seems to be subtracting by 2 everytime.

so it will be -1,-3,-5,-7,-9,-11,-13,-15,-17,-19,-21,-23,-25,-27,-29..

the answer will be 27*-2(-54) -1(because we start at -1 , not 0)

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cestrela7 [59]

Rewrite the inequality as

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We can compare this expression to the function

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The inequality states that we want to consider all the point whose y coordinates are greater than the ones of the points that lay on the graph.

So, we can graph the inequality in two steps:

Graph the line $y=-2x+4$
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Since the function $y=-2x+4$ is a line (because it is a first-degree polynomial), you can graph it by simply sampling two points: if for example we choose x=0 and x=1, the correspondent y values are

$x=0 \implies y = -2\cdot 0+4 = 4,\quad x=1\implies y = -2\cdot 1+4 = 2$

So, the line passes through the points (0,4) and (-1,2). Connect them and you have the graph of the line.

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4 years ago

A store sells 4 types of chocolate bars and surveyed 50 customers at random

Zanzabum

Hi there! The answer is D. 8%

To find the percentage of the customers who preferred the hazelnut bar we need to know two things:

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Now we can fill in the following formula, in order to find our percentage:
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4 years ago

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3 years ago

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wolverine [178]

The chosen topic is not meant for use with this type of problem.

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