1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tema [17]
3 years ago
14

hii! could someone please help with a legit answer 'n explanation? Im soo confused. thank you so much!

Mathematics
1 answer:
I am Lyosha [343]3 years ago
3 0

Answer:

First part = 2.

Time to land = 6 seconds.

Step-by-step explanation:

The object is at h = 0 when it land so

-5x^2 + 20x + 60 = 0

-5(x^2 - 4x)  = -60

-5[(x - 2)^2 - 4] = -60

(x - 2)^2 - 4 = -60/-5 = 12

(x - 2)^2 = 16.

Solving the above:

Take the square root of both sides:

x - 2 = 4

x = 2 + 4

x = 6 seconds

You might be interested in
Someone help pleaseeee
qaws [65]

Answer:

Part A = D

Part B = 5 and 50

Step-by-step explanation:

Part A:

area = 5*4x = 20x

so, 100 \leq 20x \leq  1000

Part B:

to leave it only by x, you divide both sides by 20

100/20 = 5, 1000/20 = 50

which 5\leq x\leq 50

7 0
4 years ago
There is a stack of books that is 12 4/9 inches tall. If we take a book off the stack that is 2/9 inches thick. How high is the
Yanka [14]

Answer: It would be 12 2/9

Step-by-step explanation: 4/9-2/9=2/9 Hope this helps!:)

7 0
3 years ago
I need help on 78 and 79
Orlov [11]

There are 15 pencils altogether. Of these, 4 are green. Thus, P(green) = 4/15.


3+6

There are 3 red and 6 blue pencils. Thus, P(red or blue) = --------- = 3/5

15

3 0
4 years ago
John typed a 48 word paragraph in 2/3 minute. What is the typing speed in words per minute​
serg [7]

Answer:  The answer is:  " 72 words per minute. "

___________________________

Step-by-step explanation:

___________________________

This is a "unit rate" problem.

We want to solve for/ find the number of words PER single minute.

___________________________

Given 48 words per (2/3) minute;

How many words per (one) minute?

__________________________

The answer is {48 ÷ (2/3) } words per minute:

 Note: dividing by a number is the same as multiplying by the reciprocal (inverse) of that particular number:

Hence:

__________________________

The answer is {48 * (3/2) } words per minute:

__________________________

 Write as:

  " \frac{48}{1} *\frac{3}{2} " ;

__________________________

  The "48" can be changed to "24" ; and the "2" can be changed to "1" ;

   → {Since: "48 ÷ 2 = 24 "} ;

___________________________

And we have:

___________________________

  " \frac{24}{1} *\frac{3}{1} = 24 * 3 = 72 " ;

___________________________

The answer is:  " 72 words per minute ."

___________________________

Hope this is helpful to you!

___________________________

4 0
3 years ago
Read 2 more answers
A city council consists of six Democrats and six Republicans. If a committee of seven people is​ selected, find the probability
Reika [66]
To 3 decimal places.

8 0
3 years ago
Other questions:
  • Write an equation in slope intercept form that satisfies the given conditions parallel
    6·1 answer
  • Help with question 1 please
    11·1 answer
  • How do you know x when f(x)=2
    10·2 answers
  • On Saturday 453 people go to a school play on Sunday 294peole go to the play how many more people go to the play on Saturday?
    8·2 answers
  • What is 24.357 in unit form
    5·1 answer
  • A cake recipe calls for 3/4 cup of flour for every 1/3 teaspoon of baking powder. What is the unit rate of cups per teaspoon?
    8·1 answer
  • A car manufacturing firm wishes to introduce a new line of tires into its product range. It costs them $50,000 to introduce the
    10·1 answer
  • 20098765432 plus 34567890
    9·1 answer
  • The figure is made up of two identical semicircles enclosed within a rectangle. Find the perimeter of the shaded region using 3.
    13·1 answer
  • You are a contestant on a game show called “Bargain or No Bargain.” You are presented with three briefcases, which contain rewar
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!