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3 years ago

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 = -3/5

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]

Answer:

$-9(\frac{2}{3}x) + 9(1)\\ \\-6x + 9$

Explanation:

Before we begin, remember the following rules:

1- Distribution property:

$a(b+c) = ab+ac$

2- Simplification of fractions:

$\frac{xy}{yz}=\frac{x}{z}$

3- Signs in multiplication:

+ve * +ve = +ve

-ve * -ve = +ve

+ve * -ve = -ve

Now, for the given problem, we have:

$9 (\frac{2}{3}x + 1)$

Starting with the distributive property:

$-9 (\frac{2}{3}x +1) = -9(\frac{2}{3}x) - (-9)(1) = -9(\frac{2}{3}x) + 9(1)$

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

Now, we simplify the output from the above step:

$-9(\frac{2}{3}x) + 9 = \frac{-9*2}{3}x + 9 = -6x+9$

................> 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