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
erma4kov [3.2K]
3 years ago
14

The function f(t) = -18t2 + 42t + 36 represents the height of the path traced by an airborne flying disc, where t is the time in

seconds. How many seconds will it take the flying disc to complete its path?
Mathematics
1 answer:
Ratling [72]3 years ago
5 0
To complete path means the disc lands on the ground, the height f(t)=0
-18t²+42t+36=0
simplify by dividing -6: 3t²-7t-6=0
facotor: (t-3)(3t+2)=0
t=3 or t=-2/3 (discard this negative one because time cannot be negative. 
so the answer is 3 seconds. 
You might be interested in
What is the soulution set of the equation 3x^2=48
valentina_108 [34]

Answer:

x = ± 4

Step-by-step explanation:

given 3x² = 48 ( divide both sides by 3 )

x² = 16 ( take the square root of both sides )

x = ± \sqrt{16} = ± 4

x ∈ {- 4, 4 }


8 0
3 years ago
Read 2 more answers
What system of equations is shown on the graph below?
erma4kov [3.2K]

Answer:

The equation of the line passing through the points (-2,0) and (0,-4)

\frac{y - y1}{x - x1}  =  \frac{y2 - y1}{x2 - x1}

\frac{y - 0}{x  - ( -  2)}  =  \frac{ - 4 - 0}{0 - ( - 2)}  =  \frac{ - 4}{2}  =  - 2

y =  - 2(x + 2) \\ y =  - 2x - 4

2x + y =  - 4

The equation of the line passing through the points (0,-2) and (4,0)

\frac{y - y1}{x - x1}  =  \frac{y2 - y1}{x2 - x1}  \:

\frac{y - ( - 2)}{x - 0}  =  \frac{0 - ( - 2)}{4 - 0}

\frac{y + 2}{x}  =  \frac{1}{2}

x - 2y = 4

Option B

x minus 2 y = 4 and 2 x + y = negative 4

4 0
3 years ago
Read 2 more answers
A butcher is mixing ground turkey breast that is 98% lean and beef that is 90% lean to make a blend that is 92.4% lean. Determin
Paul [167]
See brainly.com/question/8613376 for one way to work mixture problems.

The proportion of beef will be
.. (98 -92.4)/(98 -90) = 5.6/8 = 0.7

70 pounds of beef and 30 pounds of turkey are needed.

_____
1. I would prefer to use "t" and "b" as variables, rather than x and y. That way I can more easilly keep straight that they represent pounds of turkey and pounds of beef, respectively.

2. t + b = 100 . . . . . we want 100 pounds of mix

3. 98%*t +90%*b = 92.4%*100 . . . . . total pounds of lean meat

4. Using subsitution for t, we have
.. 98%*(100 -b) +90%*b = 92.4%*100
.. b*(98 -90) -98*100 = -92.4*100 . . . . . . multiply by -100, collect b terms
.. b = (98 -92.4)*100/(98 -90) . . . . . . . . . add 98*100 and divide by b coefficient
note that this expression is exactly the one we used to write down the answer above.
.. b = 5.6*100/8 = 70 . . . . . . . y, if you like
.. t = 100 -b = 30 . . . . . . . . . . x, if you like

70 pounds of beef and 30 pounds of turkey are needed.
7 0
3 years ago
Check the picture please if you're good at math!!
Jet001 [13]

Answer:

A

Step-by-step explanation:

The triangles aren't similar.

The triangles share a side so we cant use anything involving SSS SAS.

The triangles has only known congruent angle so we cant use AA.

5 0
3 years ago
PLEASE HELP
mihalych1998 [28]
Don’t use that link!! They always comment under my stuff and other people have told me that’s just to get your information and location and stuff like that! Be safe and have a nice day
5 0
3 years ago
Other questions:
  • What is the relationship between the ratios? 10/24 and 5/12 Drag and drop to complete the statement. The ratios are proportional
    8·1 answer
  • Why are handcuffs like souvenirs?
    5·2 answers
  • Louis eat 6/8 of a pizza what fraction of the pizza is left over
    9·1 answer
  • FIND THE RATE <br><br> PLSSSS HELPP ASSPPPP!!!!
    10·1 answer
  • What is the missing side length of the right triangle ? 8in and 15in
    9·1 answer
  • How many factors does the number 25 have?
    10·2 answers
  • How can I simplify/rewrite the 1st(top) equation into the 2nd(Botton),please show a step by step solution.​
    13·1 answer
  • If the value of y value directly with x, which function represents the relationship between x and y when x=3 and y=21?
    10·1 answer
  • ILL GIVE YOU 60 POINTS
    10·1 answer
  • What is the correct answer? Please hurry
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!