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3 years ago

HELP SOMEONE PLEASE!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

omeli [17]3 years ago

6 0

Answer:

3/10

Step-by-step explanation:

The question asks for the probability of finding 4 or more, so first, you must add up all of the teenagers that have 4 or more shoes. Both the 4 and 5 categories fit, so add 20 and 10. Then, find the total number of people in the sample size. Overall, 100 teenagers are represented. Finally, put the number of people that have 4 or more shoes, 30, over the sample size, 100. This equals 30/100 which should be simplified to 3/10.

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A rocket takes off from a height of 30 feet with an initial velocity of 150 ft /sec. The equation that models the path that the

algol13

Answer:

The rocket will hit the floor at 9.57 seconds

Step-by-step explanation:

Given

$G(x) = -16x^2 + 150x + 30$

Take off height = 30ft

Initial velocity= 150ft/s

Required [Missing from the question]

Time to hit the ground

The rocket will hit the ground at:

$G(x) = 0$

So, we have:

$0 = -16x^2 + 150x + 30$

Rewrite as:

$16x^2 - 150x - 30=0$

Solve using quadratic formula, we have:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

Where:

$a= 16\\ b = -150\\ c = -30$

So, we have:

$x = \frac{-(-150) \± \sqrt{(-150)^2 - 4*16*(-30)}}{2*16}$

$x = \frac{150 \± \sqrt{22500 +1920}}{32}$

$x = \frac{150 \± \sqrt{24420}}{32}$

$x = \frac{150 \± 156.27}{32}$

Split:

$x = \frac{150 + 156.27}{32}\ or\ \frac{150 - 156.27}{32}$

$x = \frac{306.27}{32}\ or\ \frac{-6.27}{32}$

Time cannot be negative;

So:

$x = \frac{306.27}{32}$

$x = 9.57$

<em>Hence, the rocket will hit the floor at 9.57 seconds</em>

3 0

3 years ago

(1, -1) parallel to y= 2/5x-3

rusak2 [61]

Y+1=2/5(x-1)
y+1=2/5x-2/5
y=2/5x-7/5

3 0

3 years ago

The area of a rectangular wall of a barn is 54 feet. It’s length is 12 feet longer than twice it’s width. Find the length and wi

matrenka [14]

Answer:the width is 3 feet

Step-by-step explanation:

6 0

3 years ago

I need helpppppppppp please

Mariulka [41]

<h2> <u><em>answer: </em></u>21 is 70% of 30 </h2>

<h2><u><em>Working out percentages </em></u></h2><h2><u><em>We have, 70% × x = 21 or, 70100 × x = 21 </em></u></h2><h2><u><em>Multiplying both sides by 100 and dividing both sides by 70, </em></u></h2><h2><u><em>we have x = 21 × 100 70 x = 30 </em></u></h2><h2><u><em>If you are using a calculator, simply enter 21×100÷70, which will give you the answer.</em></u></h2>

6 0

4 years ago

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Please help me I’m not that good with linear functions

Alisiya [41]

Answer:

the 0 is x

Step-by-step explanation:

idk but let me know if it helped

4 0

4 years ago