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3 years ago

What would the answer be (2x - 6y ) ( x + y )

Mathematics

2 answers:

slavikrds [6]3 years ago

4 0

Your answer would be 128!

(17/8, -1/8) or if you want it in decimals (2.125, -0.125)2x-6y=5 x+y=2 y=2-x2x-6(2-x)=52x-12+6=58x-12=58x=17x=17/8(17/8)+y=2 You plug in the x-value to find the y-value now y=2-17/8y=-1/8

Hunter-Best [27]3 years ago

3 0

The answer to your question is 128

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Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid.

gregori [183]

Answer:

81 cm²

Step-by-step explanation:

Since, the lateral face of a triangular pyramid is a triangle,

Given,

The base edge or the base of one lateral face of pyramid, a = 6 cm,

And, the slant height or the height of the face, k = 9 cm,

Thus, the area of one lateral face of the pyramid,

$A=\frac{1}{2}\times a\times k$

$=\frac{1}{2}\times 6\times 9$

$=\frac{54}{2}$

$=27\text{ square cm}$

We know that, a Regular triangular pyramid has 3 lateral faces,

Hence, the total lateral area of the pyramid,

$L.A.=3\times\text{ The area of one lateral face}$

$=3\times 27$

$=81\text{ square cm}$

5 0

2 years ago

Read 2 more answers

4:3 and 25:45 are equal ratios true or false

kondaur [170]

False.

The scale factor for 3 and 45 is 15.

45 / 3 = 15.

We know that 25 isn't even a whole number for the scale factor, because no number x 4 can equal 25 (whole numbers only).

25 / 3 = 6.33333

8 0

2 years ago

Simplify 8x + 7 – 2x – 4 completely.

harkovskaia [24]

Answer:

6x+3

Step-by-step explanation:

8x +7 - 2x - 4

8x-2x+7-4 ( combine like terms)

answer:

6x+3

Reminder:Whenever combining like terms, the sign changes the same

Hope this helps and make sure to thank me!

6 0

2 years ago

Read 2 more answers

An electrician has 4 meters of wire.How many strips 7/10 meter long can he cut?

Sonbull [250]

Answer:

4/7/10

40/7 which is equal around 5. something...round

5 is your answer

Step-by-step explanation:

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3 years ago

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DanielleElmas [232]

Answer:

................................

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2 years ago