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4 years ago

4. Write an expression equivalent to -3 + 2/3y - 4 - 1/3y

Mathematics

2 answers:

Vladimir79 [104]4 years ago

6 0

-3+2/3y-4-1/3y = 7+1/3

klemol [59]4 years ago

3 0

$- 3 + \frac{2}{3} y- 4 - \frac{1}{3} y = - 7 + \frac{1}{3} y$

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5. A rock is thrown vertically from the ground with a velocity of 24 meters per second,

irakobra [83]

Answer:

Step-by-step explanation:

$h(t)=-4.9t^2+24t+2$ is our quadratic,where h(t) is the height of the object after t seconds. If we are looking for how long, t, it takes the object to hit the ground, h(t) will be equal to 0 since the height of something on the ground is 0. We set the quadratic equal to zero and factor it using the quadratic formula:

$t=\frac{-24+/-\sqrt{24^2-4(-4.9)(2)} }{2(-4.9)} }$ and

$t=\frac{-24+/-\sqrt{576+39.2} }{-9.8}$ and

$t=\frac{-24+/-\sqrt{615.2} }{-9.8}$ and

the 2 solutions are:

$t=\frac{-24+24.803}{-9.8}=-.08 sec$ and

$t=\frac{-24-24.803}{-9.8}=4.98sec$

and since time can never be negative, we know that it takes 4.98 seconds for the rock to hit the ground under the given conditions.

5 0

3 years ago

Two cars start at the same time, but travel in opposite directions. One car's average speed is 30 miles per hour (mph). At the e

astraxan [27]

30 (miles) times 4 (hours) equals to 120 miles. 400 miles minus 120 miles equals 280 miles (distance the other car has driven). 280 divided by 4 (because we want to find the speed for only one hour) equals 70 miles.
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3 years ago

458 x 10 = 45,800 what is the missing exponent ?

Leviafan [203]

Answer:

the missing exponent is 2

Step-by-step explanation:

4 0

3 years ago

Write an equation for this situation.

kirza4 [7]

Answer: A) y = 3x + 2

Step-by-Step Explanation:

Let ‘x’ be the number of months
Let ‘y’ be the total no. of books he read

Given:

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He plans to read 3 books per month (3x)

Equation:

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=> y = 3x + 2

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2 years ago

When 63x3y + 105x2y is divided by -7xy, the quotient is . If this quotient is divided by , the result is 3x + 5.

Karo-lina-s [1.5K]

Answer:

-9x^2 - 15x.

-3x.

Step-by-step explanation:

The first quotient is -9x^2 - 15x.

To find the second result we divide the above by 3x + 5:

-3x

____________

3x + 5) -9x^2 - 15x

-9x^2 - 15x

-----------------

..................

The result is -3x.

8 0

3 years ago

Read 2 more answers