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3 years ago

Which of the following points is not coplanar with points C, D and E? R A S U

Mathematics

1 answer:

expeople1 [14]3 years ago

5 0

Answer:

Answer: R is not coplanar.

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What is

disa [49]

<h3>Explanation:</h3>

There is a theorem :

$\mathbf{a^{2}-b^{2}=(a-b)(a+b)}$

Proof: open the brackets on right side of equality by using distributive property

RHS = a(a+b) - b(a+b)

RHS = $\mathrm{a^{2}+ab-ab-b^{2}}$

RHS = $\mathrm{a^{2}-b^{2}}$ = LHS

Using the above theorem you can solve every question you asked:

$\mathrm{4x^{2}-1=(2x)^{2}-1^{2}=(2x-1)(2x+1)}$
$\mathrm{9x^{2}-64=(3x)^{2}-(8)^{2}=(3x-8)(3x+8)}$

$\mathrm{49x^{2}-121=(7x)^{2}-(11)^{2}=(7x-11)(7x+11)}$

$\mathrm{4x^{2}-y^{2}=(2x)^{2}-y^{2}=(2x-y)(2x+y)}$

$\mathrm{9x^{2}-b^{2}=(3x)^{2}-b^{2}=(3x-b)(3x+b)}$

$\mathrm{16x^{2}-9b^{2}=(4x)^{2}-(3b)^{2}=(4x-3b)(4x+3b)}$

$\mathrm{x^{2}-42^{2}=(x-42)(x+42)}$

6 0

3 years ago

X - y = 4<br><br> 2x + y = -4<br><br> x = y =

Aleks04 [339]

Answer: x = 4 + y

x= -2 - y/2

Step-by-step explanation:add y to both sides of the equation

8 0

3 years ago

A telephone call costs c cents for the first 3 minutes and m cents for each additional minute. Which expression represents the c

tekilochka [14]

Answer: $c+3m$

Step-by-step explanation:

Given

A telephone call costs c cents for first 3 minutes and m cents for each additional minute.

Any call beyond 3 minutes costs

$\Rightarrow c+mt$

where t is the minutes spent beyond 3 minutes

For 6 minutes , t is 3

thus, it can be written

$\Rightarrow c+3m$

4 0

3 years ago

The product od 2 and y is at least 10

alexgriva [62]

Hello There!

It could be represented by this:
$xy \geq 10$

Hope This Helps You!
Good Luck :)

- Hannah ❤

8 0

4 years ago

Judiyah is the proud new owner of a chair making business. She makes custom wood chairs. She sells her custom chairs for

miss Akunina [59]

Answer:

$60

Step-by-step explanation:

Profit = revenue - total cost

cost is total expenses incurred in running the business

total cost = cost of rent and the expensive saws and equipment + cost of wood + amount paid to worker

50 + 30 + 10 = 90

revenue is the amount earned from selling the chairs. it is equal to 150

Profit = 150 - 90 = 60

7 0

3 years ago