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3 years ago

Help me i’ll give extra points

Mathematics

1 answer:

-BARSIC- [3]3 years ago

6 0

Answer:

B and C

Step-by-step explanation:

Make rocket go down = less engine power and more weight

Pls mark brainiest :)

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What is m, 2/3 × 4/5 = 1/3÷ m

ankoles [38]

Answer:

$\frac{2}{3} \times \frac{4}{5} = \frac{1}{3} \div m \\ \frac{8}{15} = \frac{1}{3m} \\ \frac{8}{5} = \frac{1}{m} \\ 8m = 5 \\ m = \frac{5}{8} \\$

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4 years ago

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Choose as many answers as apply.

suter [353]

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3 years ago

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Tell whether the ratios are equivalent: 3 days to 4 hours and 9 days to 12 hours. show your work.

bonufazy [111]

Answer:

yes.

Step-by-step explanation:

write these ratios as fractions to see if they are proportional

3/4

9/12 -------> this can be simplified by dividing by 3

= 3/4

therefore yes they are equivalent

5 0

3 years ago

A model rocket is launched with an initial velocity of 200 ft per second. The height h, in feet, of the rocket t seconds after t

Solnce55 [7]

Answer:

2.10 s, 10.40 s.

Step-by-step explanation:

We know that the height of the rocket is given by the function:

$h=-16t^2+200t$

We are asked to find the time for which the height of the rocket will be 350 ft. So, for that moment, we know the height but we don't know the time; however, we know that the equation can help us to find the time, doing h=350:

$350=-16t^2+200t$

The last is a quadratic equation, which can be put in the form $at^2+bt+c=0$ and solved applying the formula:

$t=\frac{-b+-\sqrt{b^2-4ac} }{2a}$

So, let's put the equation on the form $at^2+bt+c=0$ adding $16t^2$ and subtracting $200t$ to each side of the equation; the result is:

$16t^2-200t+350=0$

So, we note that a=16, b=-200, and c=350.

Then,

$t_1=\frac{200-\sqrt{200^2-4*16*350} }{2*16}=2.10$

$t_2=\frac{200+\sqrt{200^2-4*16*350} }{2*16}=10.40$

According to the equation, that are the times for which the height will be 350 ft; that is because the rocket is going to ascend and then to fail again to the ground.

4 0

3 years ago

25 POINTS SOMEONE HELP ME OUT WITH THIS PLEASEEEE BRAINLIEST ANSWER

zloy xaker [14]

1. $y=7x-1$

2. $y=3x+b$
 Sub (1, -5) into equation to find 'b'
$-5=3(1)+b$
$-8=b$

$y=3x-8$

3. $x=-7$

4. $y=4$

3 0

3 years ago