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Vsevolod [243]
3 years ago
10

Help! I need an explanation to the answer to get brainliest!

Mathematics
2 answers:
postnew [5]3 years ago
7 0

Answer:

Step-by-step explanation:

Use FOIL method

(2k + 1) (k - 4) = 2k*k + 2k*(-4) + 1*k + 1*(-4)

                      = 2k² - 8k + k - 4   {add the like terms}

                    = 2k² - 7k - 4

RideAnS [48]3 years ago
4 0

Answer:

2k²-7k-4

Step-by-step explanation:

(2k + 1 ) (k - 4)

2k * k - 2k * 4 + k - 4

2k² - 8k + k - 4

2k² - 7k - 4

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The roof of the Terminal Tower is 709 feet above ground. A window washer dropped a bucket from the edge of the roof. How many se
Masja [62]

Answer:

6.64 seconds

Step-by-step explanation:

Given that:

Distance between roof of the terminal and ground = 709 feet

A bucket was dropped from the roof.

To find:

The time taken by the bucket to hit the ground?

Solution:

Distance traveled, s = 709 feet

Initial velocity of the bucket, u = 0 feet/sec (because initially it was at rest)

Acceleration of the bucket will be equal to acceleration due to gravity i.e.

g or 32.1741 ft/sec^{2}

Let the time taken is t seconds.

Formula for distance is given as:

s = ut+\dfrac{1}{2}at^2

Putting all the values:

709 = 0 (t) + \dfrac{1}{2}(32.1741) t^2\\\Rightarrow 1418 = 32.1741 t^2\\\Rightarrow t^2 = 44.07\\\Rightarrow t \approx \bold{6.64\ sec}

6 0
3 years ago
Write an algebraic expression for the word expression: <br> 15 divided by the sum of "d" and 3
Yuki888 [10]

the answer is

15/(3+d)

8 0
4 years ago
what is the probability of drawing two blue cards if the first card is not included in the second draw? simplify your answer com
BlackZzzverrR [31]

Answer:

5/14

Step-by-step explanation:

The total number of cards is 8

There are 5 blue cards

P(1st card is blue) = blue/total = 5/8

We take away a blue card

The total number of cards is 7

There are 4 blue cards

P(2nd card is blue) = blue/total = 4/7

The probability of blue blue is P(blue blue ) =

P(1st card is blue)*P(2nd card is blue) =

5/8* 4/7

20/56

We can divide the top and bottom by 4

5/14

3 0
3 years ago
Please give me the correct answer.Please only answer if you're good at math. ​
lina2011 [118]
The rate of change is 2 euro per hour. Please mark me brainliest :)
4 0
3 years ago
What is the x-intercept of y=1/3x-5​
Ronch [10]

Answer:

x = 15

Step-by-step explanation:

To find the x-intercept(s), substitute in  0  for  y  and solve for x.

0 = 1/3 x − 5

Solve the equation.

x  =  15

This is so it makes more sense for u

Hope this Helps (✿◠‿◠)

6 0
3 years ago
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