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
xxTIMURxx [149]
3 years ago
9

you throw a ball upward. its height h in feet after t seconds can be modeled by the function h=-16t^2+30t+6.after how many secon

ds will it hit the ground
Mathematics
1 answer:
professor190 [17]3 years ago
4 0
When the ball hit the ground, the height will be equal to "0".
h=0
Then:

-16t²+30t+6=0

we have to solve this square equation:

t=[-30⁺₋√(900+384)] / (-32)
t=(-30⁺₋√1284)/(-32)
we have two solutions:
t₁=(-30-√1284)/(-32)=2.06
t₂=(-30+√1284)/(-32)=-0.18  This solution is not valid.

Answer: 2.06 seconds.
t

You might be interested in
Subract 5 5/21 from 13 1/7
Sladkaya [172]

Answer:

The answer is 166/21, or 7 19/21

Step-by-step explanation:

First, you would set up the equation, which is:

13 1/7 - 5 5/21

Next, you would turn them into an improper fraction, which is:

92/7 - 110/21

Then, you would multiply 92/7 by 3/3 because that is the least common multiple for 21 and 7 (which are the denominators). When you are done multiplying, the equation would be:

276/21 - 110/21

Afterwards, you would subtract the numerators and leave the denominators alone, which gives you the answer 166/21. As a mixed number, this would equal 7 19/21.

7 0
3 years ago
Read 2 more answers
The perimeter of the original rectangle is ______
sergey [27]

Answer:

  • perimter of original rectangle = <u>17. 6 mm</u>
  • side length of the enlarged rectangle = <u>23. 22 mm</u>
  • perimeter of the enlarged rectangle = <u>95. 04 mm</u>

Step-by-step explanation:

<u>PERIMETER</u><u> </u><u>OF</u><u> </u><u>ORIGINAL</u><u> </u><u>RECTANGLE</u>

  • Length of original rectangle = 4.5 mm
  • Width of original rectangle = 4.3 mm

<em>perimeter = 2 × ( length + width)</em>

= 2 × ( 4.5 + 4.3)

= 2 × 8.8

= 17. 6 mm

<u>SIDE</u><u> </u><u>LENGTH</u><u> </u><u>OF</u><u> </u><u>ENLARGED</u><u> </u><u>RECTANGLE</u>

  • Width of original rectangle = 4. 5 mm
  • Width of enlarged rectangle = 24.3 mm

Enlargement factor = 24.3 / 4.5

= 5.4

  • Length of original rectangle = 4.5 mm
  • Enlargement factor = 5.4

Side length of enlarged rectangle

= original length × Enlargement factor

= 4.3 × 5.4

= 23. 22 mm

<u>PERIMTER OF ENLARGED RECTANGLE</u>

= 2 × ( enlarged ength + enlarged breadth)

= 2 × (23. 22 + 24. 3 )

= 95. 04 mm

8 0
3 years ago
What number is 80% of 90?
Lerok [7]
The answer is 72

b/c 80% is equal to .80 

so you do 90x.80
4 0
3 years ago
What is the value of X I don’t understand this
mash [69]

Answer:

X=4

Step-by-step explanation:

28+8=36

36/9=4

9*4=36

36-8=28

x=4

4 0
3 years ago
in a triangle TRY measure angle R is 3 times measure angle T and measure angle Y is 15 more than measure angle T find the measur
r-ruslan [8.4K]

Answer:

Angle R is 99 degree

Angle Y=48 degrees

Angle T is 33 degrees

Step-by-step explanation:

Let angle T be x

Angle R will be 3x

Angle Y will be x+15

Total=x+3x+x+15=5x+15

5x+15=180

5x=165

x=165/5=33

Therefore, angle T is 33 degrees, angle Y=15+33=48 degrees and angle R=33*3=99 degrees

5 0
3 years ago
Other questions:
  • 4th time posting this...........
    11·1 answer
  • Stem-and-Leaf Plots
    14·2 answers
  • The graph below shows the average daily temperatures on January 1 from 1900 to 1934 for city A.
    14·2 answers
  • HURRRY!!!
    10·2 answers
  • 9-5÷(8-3)×2+5 what is the value of the expression​
    5·2 answers
  • How do I solve this equation and find the vertex, axis of symmetry, y intercept and the domain and range?
    9·1 answer
  • Pls help me, i’ll give brainliest
    6·1 answer
  • Heyyyyyyyyyyyy plsss helppppppppp
    9·2 answers
  • Answer correctly. thank you​
    7·1 answer
  • If the pattern below was tripled, what would be the ratio of black squares to gray squares
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!