3 years ago

7x2 - 5x+3 + 2x +7x-8

Mathematics

1 answer:

bixtya [17]3 years ago

5 0

Answer:

7x^2+4x-5

Step-by-step explanation:

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EXPERTS/ACE/GENIUSES PLZ HELP

Anna71 [15]

I believe it's 8 because it's scale is 4 times bigger.
2×4=8

6 0

3 years ago

Read 2 more answers

If triple the difference of a number and two is three more than the number.

aksik [14]

Answer:

Rephrase that so that x=the number.

3+2x=x

(-2x) => 3=-x

(*-1) => -3=x

Therefore the number is -3!

Step-by-step explanation:

hope this helps :)

5 0

2 years ago

Make a the subject of a2+b2=c2

wel

Answer:

$a=\sqrt{c^2-b^2$

⇒ $a=\sqrt{(c+b)(c-b)}$ [Factorized form]

Step-by-step explanation:

Given expression:

$a^2+b^2=c^2$

We need to make $a$ the subject.

In order to do that we need to solve the expression for $a$ in terms of $b$ and $c$

We have,

$a^2+b^2=c^2$

Subtracting both sides by $b^2$

$a^2+b^2-b^2=c^2-b^2$

$a^2=c^2-b^2$

Taking square root both sides in order to remove square of $a$

$\sqrt{a^2}=\sqrt{c^2-b^2}$

$a=\sqrt{c^2-b^2$

The difference of squares can be factorized and written as:

$a=\sqrt{(c+b)(c-b)}$ [difference of squares $x^2-y^2=(x+y)(x-y)$ ]

4 0

3 years ago

Justin needs 9 pieces of rope that are

maria [59]

Answer:

no.

Step-by-step explanation:

half of 9 ft is 4.5 ft, 9 + 4 and 1/2 is 13 1/2

7 0

3 years ago

Which quantity is proportional to 65/5? 130/15 13/1 195/15 260/10 130/10

Nataly_w [17]

13/1 because we can divide both sides by 5 and we’ll get 13/1

5 0

3 years ago