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3 years ago

For an arithmetic sequence an = 7+3(n – 1), what is the 31st term?

Mathematics

1 answer:

slamgirl [31]3 years ago

5 0

Answer:

n= 1

Step-by-step explanation:

7+3(n-1)

10(n-1)

10n=10

n=10/10

n=1

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Evaluate the expression. P(9, 3) · P(5, 4)

boyakko [2]

Answer:

$P(9,3) *P(5,4)$

And if we use the permutation formula given by:

$nPx = \frac{n!}{(n-x)!}$

And replacing we got:

$\frac{9!}{6!} \frac{5!}{4!}= 504*5 = 2520$

Step-by-step explanation:

For this problem we want to find the following expressionÑ

$P(9,3) *P(5,4)$

And if we use the permutation formula given by:

$nPx = \frac{n!}{(n-x)!}$

And replacing we got:

$\frac{9!}{6!} \frac{5!}{4!}= 504*5 = 2520$

6 0

3 years ago

Does doubling the radius of a sphere double the surface area? Explain your reasoning using an example.

Annette [7]

Answer:

yes

Step-by-step explanation:

because area of sphere equals =

$4\pi \: r{2}$

so if we doubled the radius the surface area will be doubled

5 0

2 years ago

2(x-3)=1/2(4x-12)<br>please help MEH!!!!!....

Zinaida [17]

Answer:

infinitely many solutions

Step-by-step explanation:

2(x-3)=1/2(4x-12)

2x-6=2x-6

both sides are the same so its infinitely many solutions

8 0

3 years ago

Points A and B are on the different sides of a line 1, the distance between point A and the line lis 10 in, the distance between

givi [52]

Answer: Distance between O and the line 1 is 3 inches.

Explanation:

Since we have given that

Distance between point A and the line 1 = 10 inches

Distance between point B and the line 1 = 4 inches

Total length of segment AB is given by

$10+4=14\ inches$

Since O is midpoint of the line segment AB.

so, AO is given by

$\frac{14}{2}=7\ in.$

Now, Distance between O and the line 1 is given by

$10-7=3\ in.$

Hence, Distance between O and the line 1 is 3 inches.

7 0

3 years ago

Please help! I will give you brainliest if it is correct

nlexa [21]

Answer:

B is the correct one. Second.

6 0

2 years ago

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