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3 years ago

(X-2)2/4+(y+5)2/9=1 what is the length of major axis of this equation?

1 answer:

7 0

Step 1: Add (-1)/9 to both sides.12x+29y+19+−19=1+−1912x+29y=89Step 2: Add (-2)/9y to both sides.12x+29y+−29y=89+−29y12x=−29y+89Step 3: Divide both sides by 1/2.12x12=−29y+8912x=−49y+169Answer:x=−49y+169

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Kn+4f=9, solve for n

Alja [10]

It would be: Kn + 4f = 9
kn = 9 - 4f

n = (9-4f) / K

Hope this helps!

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expand and simplify completely (log). PLEASEE HELP ASAP!!! I WILL GIVE BRAINLIEST!! thank you so much!!!!

r-ruslan [8.4K]

Answer:

c. $2 log3(y)+1+log3(x)$

Step-by-step explanation:

When expanding and simplifying, we can see that the answer is $1+log3(x) + 2log3(y)$ , which matches Answer Choice C.

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3 years ago

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Easy simple math 39.99 x 7.25

Firlakuza [10]

Answer:

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Step-by-step explanation:

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3 years ago

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What is the missing length??

amid [387]

Answer

The missing length is 10

Step-by-step explanation:

Represent the missing length with x

The sides of the given shape are directly proportional.

Mathematically:

(15 + x) to (12 + 8) and x to 7

Represent as a ratio:

$(15 + x) : (12 + 8) = x : 8$

$15 + x : 20= x : 8$

Convert to fraction

$\frac{15 + x}{20} = \frac{x}{8}$

Cross Multiply:

$(15 + x)*8 = 20 * x$

$120 + 8x = 20x$

Collect Like Terms

$20x - 8x = 120$

$12x = 120$

Solve for x

$x = \frac{120}{10}$

$x = 10$

The length of the missing side is 10

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3 years ago

The quadratic function d= -4x+1,100 models a snowboarder's distance, in feet, from the bottom of a hill x seconds after the snow

Fynjy0 [20]

Answer:

16 seconds (Approximately)

Step-by-step explanation:

Given:

The function that gives the distance of snowboarder from the bottom of hill with time 'x' is:

$d=-4x^2+1100$

Final position of the snowboarder is $d=100\ ft$

Now, plugging in 100 for 'd' and solving for 'x', we get:

$100=-4x^2+1100$

Adding -1100 both sides, we get:

$100-1100=-4x^2+1100-1100\\-1000=-4x^2$

Dividing both sides by -4, we get:

$\frac{4x^2}{4}=\frac{1000}{4}\\x^2=250$

Taking square root and neglecting the negative root as time can't be negative. So,

$\sqrt{x^2}=\sqrt{250}\\x=5\sqrt{10}=15.8\ s\approx 16\ s$

Therefore, after 16 seconds, the snowboarder will be at a distance of 100 ft from bottom of hill.

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3 years ago