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3 years ago

Which points are coplanar and non ol linear

Mathematics

1 answer:

JulijaS [17]3 years ago

7 0

Answer:

<h2>COPLANAR:</h2>

Point A, C and D

<h2>NON- COLLINEAR:</h2>

Point B

Step-by-step explanation:

${hope it helps$

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can someone please help me with this math thing, i'm being timed and i don't know what else i can do, if someone wants to help j

Neporo4naja [7]

Answer:

Step-by-step explanation:

a. amt. of weeks and hours worked

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3 years ago

How do I find this, what’s the formula to find the 20th term and can anyone explain the formula? Will award brainliest

harina [27]

Answer:

f(n) = n^2 +1
f(20) = 401

Step-by-step explanation:

The first differences of the sequence are ...

5-2 = 3
10-5 = 5
17-10 = 7
26-17 = 9
37-26 = 11

Second differences are ...

5 -3 = 2
7 -5 = 2
9 -7 = 2
11 -9 = 2

The second differences are constant, so the sequence can be described by a second-degree polynomial.

We can write and solve three equations for the coefficients of the polynomial. Let's define the polynomial for the sequence as ...

f(n) = an^2 + bn + c

Then the first three terms of the sequence are ...

f(1) = 2 = a·1^2 + b·1 + c
f(2) = 5 = a·2^2 +b·2 + c
f(3) = 10 = a·3^2 +b·3 +c

Subtracting the first equation from the other two gives ...

3a +b = 3

8a +2b = 8

Subtracting the first of these from half the second gives ...

(4a +b) -(3a +b) = (4) -(3)

a = 1 . . . . . simplify

Substituting into the first of the 2-term equations, we get ...

3·1 +b = 3

b = 0

And substituting the values for a and b into the equation for f(1), we have ...

1·1 + 0 + c = 2

c = 1

So, the formula for the sequence is ...

f(n) = n^2 + 1

The 20th term is f(20):

f(20) = 20^2 +1 = 401

_____

<em>Comment on the solution</em>

It looks like this matches the solution of the "worked example" on your problem page.

4 0

3 years ago

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11111nata11111 [884]

For this question, we want to find out the greatest amount of area of pizza for the least amount of money:

So we have two pizzas with a 10 in. diameter. Let us take one of those pizzas.

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We have two of these pizzas, so the total area that we would get with $14 would be 25 $\pi$ *2 or 50 $\pi$ .

For the second case, we have one pizza with a 14 in. diameter.

The area of this pizza will be $\pi (7)^2$ or 49 $\pi$ .

So for $15 we can buy 49 $\pi$ worth of pizza.

The best deal would be to buy the two medium pizzas of 10 inch diameter, because for $14, you get 50 $\pi$ .

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nexus9112 [7]

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