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Fantom [35]
3 years ago
13

Can someone help? I’m completely blanking

Mathematics
1 answer:
Art [367]3 years ago
8 0

The pattern is adding 2 stars on top of the previous figure, so figure number 4 would look like this:

* *

* *

* *

* *

Since the pattern is adding 2 stars every time, the explicit formula (for the number of stars) would be

f(n)=2n

Since when n=1, i.e. figure 1, we have 2*1=2 stars

when n=2, i.e. figure 2, we have 2*2=4 stars

when n=3, i.e. figure 3, we have 2*3=6 stars

and so on.

The recursive formula lays on the fact that we add 2 stars to the previous figure, which means that the fomula is

f_n = f_{n-1}+2

In fact, what we just wrote is simply "the number of stars at a given iteration is the number of stars at the previous iteration, plus 2.

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A number less 24 is -1. Find the number.<br> a) 23<br> b) 25<br> c) -25<br> d) -23
Flauer [41]

Answer:

a) 23

Step-by-step explanation:

6 0
3 years ago
I need help<br>I'm doin​
aev [14]

Answer:

graph A  

Hope that helps!                                                                                                  

6 0
3 years ago
Read 2 more answers
ANSWER QUICK!! 75 PTS!!!
iogann1982 [59]

Answer:

2) x = -2 , y = 2

3) no solution exists

Step-by-step explanation:

Solve the following system:

{-2 x - 3 y = -2

y = 2 x + 6

Hint: | Perform a substitution.

Substitute y = 2 x + 6 into the first equation:

{-2 x - 3 (2 x + 6) = -2

y = 2 x + 6

Hint: | Expand the left hand side of the equation -2 x - 3 (2 x + 6) = -2.

-2 x - 3 (2 x + 6) = (-6 x - 18) - 2 x = -8 x - 18:

{-8 x - 18 = -2

y = 2 x + 6

Hint: | Choose an equation and a variable to solve for.

In the first equation, look to solve for x:

{-8 x - 18 = -2

y = 2 x + 6

Hint: | Isolate terms with x to the left hand side.

Add 18 to both sides:

{-8 x = 16

y = 2 x + 6

Hint: | Solve for x.

Divide both sides by -8:

{x = -2

y = 2 x + 6

Hint: | Perform a back substitution.

Substitute x = -2 into the second equation:

Answer: {x = -2 , y = 2

4 0
3 years ago
5/10 + 3/10 plz help!
spayn [35]
The answer to this question is 8/10 which also equals 4/5
6 0
3 years ago
Read 2 more answers
Can someone help please ​
Tanya [424]

half of the triangle is a right angle triangle, so we use the phythagoras theorem and multipy our answer by 2

6 0
3 years ago
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