3 years ago

Simplify the expression. (5x2 - x - 7) + (2x2 + 3x + 4)

Mathematics

1 answer:

kifflom [539]3 years ago

5 0

Answer:

$7x^2-2x-3$

Step-by-step explanation:

First get rid of the parenthesis

$5x^2-x-7+2x^2+3x+4$

Next simplify the variables

$7x^2-x-7+3x+4$

$7x^2-2x-7+4$

$7x^2-2x-3$

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skelet666 [1.2K]

Answer:

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Step-by-step explanation:

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3 years ago

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KatRina [158]

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3 years ago

Find the distance between points A = (2, 0) and

allochka39001 [22]

Answer:

9.2

Step-by-step explanation:

You want the distance between A(2, 0) and B(0, 9).

<h3>Distance</h3>

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d = √((x2 -x1)² +(y2 -y1)²)

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2 years ago

What is the quotient in scientific notation?

levacccp [35]

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2 years ago

1.In a class of 45 pupils ,21play chess and 23 play cards and 5play both games

Mumz [18]

Step-by-step explanation:

(a)

ii.

21 - 5 = 16 play only chess.

iii.

23 - 5 = 18 play only cards

5 play both.

that is 16+18+5 = 39 that play at least one of these games.

so, 45 - 39 = 6 don't play any of these games.

(b)

we have 16+18 = 34 pupils out of 45 that play exactly one game.

so the probabilty to pick one of them is as usual

desired cases / total cases = 34/45 =

= 0.755555555... ≈ 0.76

8 0

2 years ago