All categories

3 years ago

HELP MATH!!

Mathematics

1 answer:

Alex787 [66]3 years ago

5 0

The answer would be A.6t.It would be a because c and d are adding not multiplying and b has 7 instead of 6.

You might be interested in

Need help with math problem if do 5 stars

Novosadov [1.4K]

Here it is I hope this is what u needed

6 0

3 years ago

Read 2 more answers

Consider the infinite geometric series (∞/Σ/n=1) * -4(1/3)^{n-1}.

raketka [301]

The first four terms of the series probably refer to the first four partial sums.

$\displaystyle\sum_{n=1}^1-4\left(\frac13\right)^{n-1}=-4\left(\frac13\right)^{1-1}=-4$
$\displaystyle\sum_{n=1}^2-4\left(\frac13\right)^{n-1}=-\frac{16}3$
$\displaystyle\sum_{n=1}^3-4\left(\frac13\right)^{n-1}=-\frac{52}9$
$\displaystyle\sum_{n=1}^4-4\left(\frac13\right)^{n-1}=-\frac{160}{27}$

which you can compute either by adding one term at a time, or using the well-known formula,

$\displaystyle\sum_{n=1}^kar^{n-1}=a\frac{1-r^{k+1}}{1-r}$

(I can provide a link to a derivation I gave in a nearly identical question in the comments)

The series converges as $k\to\infty$ if and only if $|r|$ , which is certainly the case here, since $-1$ .

Extrapolating from the formula above, the sum of the convergent series is

$\displaystyle\sum_{n=1}^\infty ar^{n-1}=\frac a{1-r}$

so the sum for this series is $\dfrac{-4}{1-\frac13}=-6$ .

5 0

4 years ago

PLEASE HELP

Fantom [35]

In step 3, Mark forgot to multiply 5 · 5, so he ended up with 5 in the denominator instead of 5 · 5 = 25

3 0

4 years ago

Femi’s last 5 bowling scores were 68 75 90 and 80 what was femis mean score

posledela

It says last 5 bowling scores but there’s only four numbers listed just fyi

To find the mean, add all the numbers up and then divide by how many numbers you just added.

So, let’s add 68, 75, 90, 80

That equals 313. Now let’s divide by four, since we added four numbers together.

313 divided by four equals 78.25

So out of those four scores you gave me, her average was score 78.25

Hope this helped :)

7 0

3 years ago

9 less than the sum of x and y

Zarrin [17]

If we need to turn this into a mathematical expression:

Answer: (x + y) - 9

Step-by-step explanation:

9 less than the sum of x and y

(the sum of x and y) - 9

(x + y) - 9

Read more about algebraic expressions here:

brainly.com/question/27791850

7 0

2 years ago