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devlian [24]
3 years ago
14

Which equations are correct

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
3 0

Answer:

2nd, 3rd and 4th equations are correct.

Step-by-step explanation:

-4x^2(2x^2+5)=-8x^4-20x^2\\\\

is right because each term inside is multiplied by -4x square and we find the answer is right.

-4b^3(5b^2+3)\\\\\\= -4(5)(b^3)(b^2) =-20b^6-12b^3\\

Hence correctly done.

-5a^4(2a^2+4)=  (-5)(2)(a^4)(a^2)+(-5)(4)(a^4\\-10a^6-20a^4\\

Correctly done.

-6^4(4y^2+2)=-24y^8-12y^4\\= -(6)(6)(6)(6) 4y^2 -(6)(6)(6)(6) (2)

should be the right answer.

But instead only 6 is multiplied by inner terms. Hence wrong.

I answer is wrong and others are right.

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Evaluate the funtion for x = -4n.
Artemon [7]
I got B for my answer. 
3 0
3 years ago
A person bought some Australian dollar of NRs 1,50,000 according to the exchange rate. Australian dollar 1 = NRs 77.02. After fi
AlekseyPX

Answer:

  5.26% profit (NRs 7,894.24)

Step-by-step explanation:

The exchange of 1,50,000 NRs to A$ will give ...

  A$ 1/(NRs 77.02) = x /1,50,000

  x = A$ 1,50,000/77.02 = A$ 1947.54 . . . . . (rounded down)

If the Nepali rupees are devalued by 5%, then what did buy A$ 1 will now buy only A$ 0.95. Then the exchange back to NRs will give ...

  (NRs 77.02)/(A$ 0.95) = x/(A$ 1947.54)

  x = NRs (1947.54)(77.02/0.95) = NRs 1,57,894.24

The effective profit is the difference from the amount initially exchanged, NRs 7,894.24, or ...

  (1,57,984.24/1,50,000 -1) × 100% ≈ 5.26%

__

<em>Additional comment</em>

Except for the loss in the exchange due to rounding down, the profit would be 1/0.95 -1 = 5.2632%. Instead, it is 5.2628%. This is why investors move their money to investments that retain their value when the local currency is losing its value.

5 0
2 years ago
Hey, can you guys please help me get the answer. And explain it to me so i know? Thank you.
cestrela7 [59]

Step-by-step explanation:

a || b,

m+125=180° ( straight angle)

m= 180-125° =55°

8 0
2 years ago
Simplify [7+2(5 - 9)2]/[(4+1)2 - 3(22)
svet-max [94.6K]

Answer:

9/56 is your answer.

Step-by-step explanation:

[7+2(5 - 9)2]/[(4+1)2 - 3(22)=

[7+2(-4)2]/[(5)2-66]=

[7+2(-8)]/[10-66]=

(7+-16)/(-56)=

-9/-56=

9/56 is your answer.

4 0
3 years ago
Read 2 more answers
The regression equation below relates the scores students in an advanced statistics course received for homework completed and f
serg [7]

Answer: d.) None of the answer choices is correct

Step-by-step explanation:

The homework score is an independent variable (known) and on the x-axis, while the midterm exam is the dependent variable, so it's on the y-axis

y = 0.91x - 94.4; and x=420

Substitute x as 420 into the equation.

y = 382.2 - 94.4 = 287.8, or approximately 288.

And this value isn't in the options above.

7 0
3 years ago
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