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
sweet [91]
3 years ago
8

I HAVE ONE WEEK OF SCHOOL CAN SOMEONE HELP?!

Mathematics
1 answer:
ira [324]3 years ago
8 0

9514 1404 393

Answer:

  1. 5 seconds

  2. 4.5 seconds

Step-by-step explanation:

Both of these questions can be solved the same way. Each quadratic gives height as a function of time. You're interested in the time at which the height is zero. Factor the quadratic and find the positive value of x that makes the relevant factor be zero.

__

1) y = -15x(x -5)

  x = 5 makes the second factor zero

The golf ball is in the air 5 seconds.

__

2) y = -12x(x -4.5)

  x = 4.5 makes the second factor zero

The football is in the air for 4.5 seconds.

_____

<em>Additional comment</em>

The "zero product rule" tells you a product will be zero if and only if one or more of the factors is zero. When a factored quadratic (or any other polynomial) is zero, one of the factors must be zero. If the factor is of the form (ax+b), then the corresponding solution is ...

  ax+b = 0   ⇒   ax = -b   ⇒   x = -b/a

That is, once you have the factored form, you can write the solutions "by inspection."

You might be interested in
4|m−n| if m=−7 and n=2 i really need to know what this is asap please
vekshin1

Answer:

36

Step-by-step explanation:

Plug in -7 as m and 2 as n into the expression:

4 | m - n |

4 | -7 -2 |

Solve:

4 | -9 |

4(9)

= 36

6 0
3 years ago
Solve the equation for all real solutions in simplest form.<br> 3x2 - 12x + 11 = x
Ivanshal [37]

Answer:

(13 + or - (sign) square root(37)) / 6

Step-by-step explanation:

First search up the quadratic formula which is

x = (- b + or - square root(b^2 - 4ac)) / 2a

and to find a, b, and c you need this formula

ax^2 + bx + c = 0 (btw this is the safest solution to finding your answer with a number in-front of a quadratic equation.)

Math:

a = 3, b = -13, c = 11

b = -13, because of the x on the other end of the equation as the equation above "ax^2 + bx + c = 0" you need the zero to proceed to this next step.

Side Note: You only take the number and not the variable, variables are x, y, w, z, or etc.

(- (- 13) + or - square root((-13)^2 - 4(3)(11) ) ) / 2 * 3

13 + or - square root(37) / 6

5 0
2 years ago
Lol help now files just type it
insens350 [35]

Answer:

2 = 4/2

Step-by-step explanation:

Well the one for the 2 wholes, Since 2 wholes equal 4/2

because 4/2 simplified is 2 whole it I believe would be 4/2

6 0
3 years ago
Read 2 more answers
What is the simplified base of the function f(x) = 1/4 3/108*x?
Zinaida [17]
The Answer is B. 3 x 3/4
4 0
3 years ago
Read 2 more answers
5. An angle bisector of a triangle divides the opposite side of the triangle into segments 6 cm and 5 cm long. A second side of
Umnica [9.8K]
This is not my work but i hope this can help you with your problem
https://answers.yahoo.com/question/index?qid=20120518194118AAhi738

7 0
3 years ago
Read 2 more answers
Other questions:
  • Plzplzplz please help
    14·1 answer
  • Please help, operation with rational numbers XXIV
    14·1 answer
  • Write a word problem that involves combining three equal groups
    14·1 answer
  • HELP ME PWEASE!!!!!!!​
    13·1 answer
  • What is 3.75 multiplied by .63
    5·2 answers
  • Find the measure of a 2.<br> 45 135<br> 62 = [?]
    8·1 answer
  • Find the rest of the equation.
    13·1 answer
  • A den has a circular rug. According to the tag, the rug has an area of 3.14 square meters.
    11·1 answer
  • 100 decreased by 50% and 150% decreased by 60% percent<br> Which is greater?
    7·1 answer
  • One-third of a cake recipe calls for 3/4 cup of flour. How many cups are needed per recipe?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!