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valkas [14]
3 years ago
11

I need help on these two geometry questions...

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
4 0
Go on... :) You can post hem both as a question as a future reference
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(2x - y + 3) (2x - y - 3)using identities ​
Tems11 [23]

Step-by-step explanation:

(2x-y+3)(2x-y-3)=

4x²-2xy-6x-2xy+y²+3y+6x-3y-9=

4x²-4xy+y²-9=

(2x-y)²-9

6 0
3 years ago
PLEASE I NEED THIS ASAP!!!
lesya692 [45]

Answer:

Option D. is the correct choice.

Step-by-step explanation:

Cylinder and a cone.

6 0
3 years ago
Sixty-three less than 15 times a number is 72. what is the number?
exis [7]

Answer:

-3/5

Step-by-step explanation:

First represent this with numbers. Less means subtraction -, times means multiplication *, is means equals =.

And let's represent "a number" with x.

63 - 15x = 72

Solve for x. First subtract 63 from both sides.

-15x = 72-63

-15x = 9

x = -9/15 = <u>-3/5</u>

7 0
3 years ago
Read 2 more answers
Which expressions are equivalent to Negative 9 (two-thirds x + 1)? Check all that apply.
Sav [38]

<u><em>Answer:</em></u>

<u><em /></u>-9(\frac{2}{3}x) + 9(1)\\  \\-6x + 9

<u><em>Explanation:</em></u>

<u>Before we begin, remember the following rules:</u>

<u>1- Distribution property:</u>

<u />a(b+c) = ab+ac

<u>2- Simplification of fractions:</u>

<u />\frac{xy}{yz}=\frac{x}{z}

<u>3- Signs in multiplication:</u>

+ve * +ve = +ve

-ve * -ve = +ve

+ve * -ve = -ve

<u>Now, for the given problem, we have:</u>

<u></u>9 (\frac{2}{3}x + 1)

<u>Starting with the distributive property:</u>

<u />-9 (\frac{2}{3}x +1) =  -9(\frac{2}{3}x) - (-9)(1) = -9(\frac{2}{3}x) + 9(1)

..................>This corresponds to option 1

<u>Now, we simplify the output from the above step:</u>

<u />-9(\frac{2}{3}x) + 9 = \frac{-9*2}{3}x + 9 = -6x+9

................> This corresponds to option 5

Hope this helps :)

4 0
3 years ago
Read 2 more answers
How many ways can 18 baseball cards be passed out to 2 students?
ExtremeBDS [4]

18\cdot17=306

5 0
3 years ago
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