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soldi70 [24.7K]
3 years ago
11

What is the difference? (-4x + 3) - (7x - 3x2 - 1)

Mathematics
1 answer:
Anna007 [38]3 years ago
7 0

Answer:

-5x + 4

Step-by-step explanation:

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I AM IN DESPERATE NED OF QUICK HELP PLEASEEEEEEEEEEEEEEEEEEEEEE!!!!!!!!!!!!!!!!!!!!!!
rosijanka [135]

Answer:

16

Step-by-step explanation:

To solve this equation, we need the formula for perfect squares:

  • (a + b)^2 = a^2 + 2ab + b^2

or

  • (a - b)^2 = a^2 - 2ab + b^2 <em>this is the formula we will use because the signs match the one in the question</em>.

Knowing these, we can set up an equation that assumes that the answer we will end up with is a perfect square.

Work:

(v - x)^2 = v^2 -8v + x^2

  • this is the setup for being able to solve for the unknown x, now we need to solve for x.

(v - x)^2 = v^2 - 8v + x^2 (I replaced 2ab with 8v because I'm setting up this question to be a perfect square).

(v - x) (v - x) = v^2 - 8v + x^2

  • multiply the left side. Remember that your answer will not be v^2 + x^2, but v^2 - 2vx +x^2.

v^2 - 2vx + x^2 = v^2 + 8v + x^2

  • Divide like terms and isolate the variable. In this case, v^2 and x^2 are on both sides, so dive them and they will be canceled out.

2vx = 8v

  • divide by 2v and you will have your value for x.

x = 4

  • Now we plug x into our original equation equation for perfect squares.

(v - 4)^2 = v^2 - 8v + 16

Our final answer is 16.

5 0
4 years ago
Evaluate the function for the given value.
maks197457 [2]

Answer:

g(t) = 2 \cdot 0.4t \ for \ t = -2\\g(-2) = 2 * 0.4*-2 = -1.6

none of the above.

Are u sure question is correct?

7 0
3 years ago
Is 17/24 a rational number
iren2701 [21]

Answer:

yes

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

7 0
3 years ago
Given that √5 ≈ 2.2360679775 and ???? ≈ 3.1415926535, find the sum √5 + ???? to an accuracy of 10−8 without using a calculator.
muminat

Answer:

√5 + π  = 537766063.1 × 10^{-8}

Step-by-step explanation:

given data

√5 ≈ 2.2360679775

π ≈ 3.1415926535

to find out

√5 + π

solution

√5 + π  = 2.2360679775 + 3.1415926535

√5 + π  =  5.3776606310

√5 + π  =  5.3776606310 × \frac{10^{-8}}{10^{-8}}

√5 + π  = 537766063.1 × 10^{-8}

3 0
3 years ago
PLEASE HELP IM STUCK
SpyIntel [72]

Step-by-step explanation:

\frac{y2 - y1 }{x2 - x1}  =  \frac{3 -  - 2}{5 - 0}  =  \frac{5}{5}  = 1

4 0
2 years ago
Read 2 more answers
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