3 years ago

What is (9x^4-x^2y^2-5y^4)-(3x^4+2x^2y^2-7y^4)

1 answer:

8 0

(9x⁴ - x²y² - 5y⁴) - (3x⁴ + 2x²y² - 7y⁴)
9x⁴ - x²y² - 5y⁴ - 3x⁴ - 2x²y² + 7y⁴
6x⁴ - 3x²y² + 2y⁴

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Round 47.219 to the nearest tenth.

saveliy_v [14]

Answer:

47.2

Step-by-step explanation:

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2 years ago

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Y-4x=3. 2x-3y=21 can someone help

mars1129 [50]

Y-4X =3 ; 2x-3y=21

Y= 3+ 4x

2x -3( 3+4x)= 21

2x- 9- 12x= 21

-10x -9= 21

-10x -9+9= 21+9

-10x = 30

X= 30/-10= -3

Y= 3+4x = 3+ 4* (-3)= 3-12= -9

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3 years ago

Solve the equation. 9+2 14x – 31 = 19 Please answer it step by step

siniylev [52]

Answer:

$x = \frac{41}{28} = 1 \frac{13}{28}$

Step-by-step explanation:

$9 + 2(14x - 3) = 19$

$9 + 28x - 31 = 19$

$- 22 + 28x = 19$

$28x = 19 + 22$

$28x = 41$

$\boxed{\green{x = \frac{41}{28} = 1 \frac{13}{28}}}$

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3 years ago

Answer for number 19

murzikaleks [220]

I’m in High school I never did that

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3 years ago

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Pam has taken 4 tests. She scored an 82, 94, 89 and 92. What would she need to score on her 5th test to have a mean of 90?

zavuch27 [327]

Answer:

Step-by-step explanation:

5*90 = 450

82+94+89+92 = 357

450-357 = 93

hope this helped :)

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3 years ago