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3 years ago

I need help with this:(

Mathematics

1 answer:

Fudgin [204]3 years ago

6 0

Answer:

94%

Step-by-step explanation:

The whole thing is about averages. Currently the average an 87%, because 85+91+86 = 262. 262/3 = roughly 87%.

Now if she got another score, that would mean it would now be divided by 4 instead of 3. So the equation is:

(262+x)/4 = 89

*4 *4

____________

262 + x = 356

-262 -262

____________

x = 94

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3 years ago

What is the slope of (-1,6) and (2,3)?

LenKa [72]

Answer:

-1

Step-by-step explanation:

For a line joining two points (x1, y1) and (x2, y2), it's slope is given as:

$\boxed{ \mathsf{slope = \frac{ y_{2} -y _{1}}{ x_{2} - x _{1}} }}$

Here, the two points are (-1, 6) and (2, 3) in place of (x1, y1) and (x2, y2).

Solving for slope:

$\implies \mathsf{ \frac{3 - 6}{2 - ( -1 )} }$

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Hence, the slope of the line joining the given points is <u>-1.</u>

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3 years ago

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Ksenya-84 [330]

Answer:

Step-by-step explanation:

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3 years ago

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denpristay [2]

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Step-by-step explanation:

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2 years ago

use the explicit formula an = a1 + (n - 1) * d to find the 500th term of the sequence below. 24,30,36,42,48,... A. 3018 B. 3042

marishachu [46]

Answer:

Option A.

Step-by-step explanation:

The given sequence is

24, 30, 36, 42, 48, ...

It is an AP. Here,

First term = 24

Common difference = 30-24 = 6

The given explicit formula for nth term is

$a_n=a_1+(n-1)d$

where, $a_1$ is first term, d is common difference.

Substitute $a_1=24, d=6 \text{ and }n=500$ in the above formula.

$a_{500}=24+(500-1)(6)$

$a_{500}=24+(499)(6)$

$a_{500}=24+2994$

$a_{500}=3018$

The 500th term of the sequence is 3018.

Therefore, the correct option is A.

3 0

3 years ago