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3 years ago

Explain how to solve this problem. -5 + 18 + (-12) + (-1)

Mathematics

1 answer:

Nana76 [90]3 years ago

6 0

Answer:

Step-by-step explanation:

-5 + 18 + (-12) + (-1)

-5+18-12-1

13-13

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Please evaluate the equation

snow_lady [41]

Step-by-step explanation:

$= \sum \limits_{n = 1}^{7} ( - 2. {6}^{n - 1} )$

$= \sum \limits_ {n = 1}^{n_{ \text{max}}} (a_1. {r}^{n - 1} )$

$\:$

$a_1 = - 2$

$n = 7$

$r = 6 \to r >1$

$\:$

• Find S7.

$s_n = a_1.( \frac{ {r}^{n} - 1}{r - n} )$

$s_7 = - 2.( \frac{ {6}^{7} - 1 }{6 - 1} )$

$s_7 = - 2.( \frac{279.936 - 1}{5} )$

$s_7 = - 2.( \frac{279.935}{5} )$

$s_7 = - 2 \: . \: 55.987$

$s_7 = - 111.974$

The answer is B.

8 0

2 years ago

PLS ANSWER HELP ... I will give 15 points

serg [7]

Answer

I believe its 2 and 3

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

How do you do 3x (3X+6) please list how to do in order please. thanks!

Nadusha1986 [10]

Do what? If you mean to find when it equals zero...

By inspection you can see that if x=0 or 2 the expression is equal to zero...

You multiply each term in the parentheses by the term outside the parentheses...like:

3x*3x+3x*6 which is equal to:

9x^2+18x If you meant to expand it....

9x(x+2) If you meant to factor it completely

8 0

3 years ago

Read 2 more answers

6. Find the value of x.

iris [78.8K]

Answer:

d.51

Step-by-step explanation:

Let the 3rd angle of the triangle be y. Then:

y+117=180

y=63

Then:

x=180-63-66

=51°

4 0

3 years ago

Your company offers warranty coverage for MP3 players. The policy provides for the replacement of MP3 players that fail within 3

Finger [1]

Answer:

181 MP3 players

Step-by-step explanation:

Given data:

Replacement of MP3 that fail within 3 years

expected lifetime of MP3 = 5 years

number of MP3 players purchased = 1000

number of MP3 players replaced in the first year = ?

To determine the number of MP3 replaced in the first year we will employ this formula:

$E(To) = \frac{1}{u} = e_{x} ^{0} =\int\limits^a_0 {po} \, dt$

a = ∞

since the given problem is an exponential distribution

1/u = 5 hence u = 0.2

next we will determine the number of MP3's to fail in its first year of purchase

qo = failure

po = success

number of purchase = 1000

attached below is the remaining part of the solution

7 0

3 years ago