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mash [69]
3 years ago
13

Please help!!!

Mathematics
1 answer:
Lerok [7]3 years ago
5 0

The sum of x^2−3xy−y^2 and 2x^2+5xy−4y^2:

x^2−3xy−y^2 + 2x^2+5xy−4y^2

= 3x^2 + 2xy - 5y^2


From 6x^2−7xy+8y^2 subtract the sum of x^2−3xy−y^2 and 2x^2+5xy−4y^2:

6x^2−7xy+8y^2 - (3x^2 + 2xy - 5y^2)

= 6x^2−7xy+8y^2 - 3x^2 - 2xy + 5y^2

= 3x^2−9xy + 13y^2


Answer

3x^2−9xy + 13y^2

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Vikki [24]

Answer: the picture is blurry but it would be the third option. One box out of three shaded.

Step-by-step explanation:

33 1/3 is one third of 100.

Choose the picture that has 1 out of three boxes shaded. This would represent one third.

7 0
3 years ago
Find the length of each arc. Round your answers to the nearest tenth.
Aleonysh [2.5K]

Answer: 7.1 yd

Step-by-step explanation:

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8 0
3 years ago
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Kobotan [32]

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6 0
3 years ago
Sin * (x - y) , if sin x = 8/17 cos y = 12/37
abruzzese [7]

Answer:

-429/629

Step-by-step explanation:

Use angle difference formula:

sin(x − y) = sin x cos y − sin y cos x

Assuming x and y are in the first quadrant:

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Plugging in values:

sin(x − y) = (8/17) (12/37) − √(1 − (12/37)²)√(1 − (8/17)²)

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8 0
3 years ago
Algebra 2 help!
murzikaleks [220]
<h3>Answer:</h3>
  • x-intercept: 82.75
  • y-intercept: -2.15
<h3>Step-by-step explanation:</h3>

To find the x-intercept, set y=0 and solve.

... 0 = log(12x +7) -3

... 3 = log(12x +7) . . . . add 3

... 1000 = 12x +7 . . . . take the antilog. (10^3 = 1000)

... 993 = 12x . . . . . . . .subtract 7

... 82.75 = x . . . . . . . . divide by 12

To find the y-intercept, set x=0 and solve.

... y = log(12·0 +7) -3

... y = log(7) -3 . . . . . . simplify

... y ≈ 0.85 -3 = -2.15 . . . . use a calculator for the log function

4 0
3 years ago
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