3 years ago

10 POINTS!!

Mathematics

1 answer:

goblinko [34]3 years ago

3 0

Answer:

Step-by-step explanation:

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8x + 4y= 12 <br> 2x+ y= 3

Dmitry [639]

Are you suppose to find x or y? or both?

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3 years ago

The quadratic model f(x)=-5x^2 +200 represents the approximate height, in meters, of a ball x seconds after being dropped. The b

mel-nik [20]

Answer:

Third option: 5.48

Step-by-step explanation:

Given the quadratic model that represents the approximate height in meters of the ball $f(x)=-5x^2 +200$ . the time in seconds x, when the ball is 50 meters from the ground can be calculated by substituting $f(x)=50$ and solving for x.

Then:

$50=-5x^2 +200$

Subtract 200 from both sides:

$-200+50=-5x^2 +200-200\\-150=-5x^2$

Divide both sides by -5:

$\frac{-150}{-5}=\frac{-5x^2}{-5}\\30=x^2$

Apply square root to both sides:

$\sqrt{30}=\sqrt{x^2}\\\sqrt{30}=x\\5.48=x$

The ball is 50 meters from the ground after about 5.48 seconds.

3 0

3 years ago

5 times 60 equals 5 times how many tens

Zielflug [23.3K]

5*12 = 60 so 6 tens ig

5 0

3 years ago

Given that f (x) = x^2 - 5x and g (x) x + 4

velikii [3]

1) (x-2)^2
2)-4x(x+5)

pls mark as brainliest:))

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3 years ago

What is the area of a rectangle which has a perimeter of 60 m and a width of 10 m?

olga_2 [115]

Answer:

200

Step-by-step explanation:

please mark as brainliest if correct

thank you

5 0

2 years ago