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
NeX [460]
3 years ago
7

PLEASEE HELP!!

Mathematics
1 answer:
Alex777 [14]3 years ago
5 0

Answer:

<h2>A)t=6.7</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • quadratic equation
  • quadratic equation word problems
  • solving quadratic
<h3>given:</h3>

h(t) = -4t² + 12t + 100

<h3>to solve:</h3>

t

<h3>tips and formulas:</h3>
  • <u>the</u><u> </u><u>Ball</u><u> </u><u>will</u><u> </u><u>hit </u><u>the</u><u> ground</u><u> </u><u>when</u><u> </u><u>the</u><u> height</u><u> is</u><u> </u><u>0</u>
  • <u>solving</u><u> </u><u>quadratics </u><u>using</u><u> </u><u>quadratic</u><u> formula</u>
  • <u>PEMDAS</u>
<h3>let's solve: </h3>

step - 1 :  \: define

- 4 {t}^{2}  + 12t + 100 = 0

step - 2 :  \\ divide \: both \: sides \: by \:  - 4

{t}^{2}  - 3t - 25 = 0

step - 3 :  \\ solve \: the \: quadratic

formula :  \\ x =  \frac{ - b± \sqrt{ {b}^{2} - 4ac }  }{2a}

define \: a ,b \: and \: c \\ which \: are \: 1, - 3 \: and \:  - 25 \: respectively

t =  \frac{ - ( - 3)± \sqrt{ {( - 3)}^{2} - 4.1. - 25 }  }{2.1}

t =  \frac{  3± \sqrt{ 9    + 100}  }{2}

t = \frac{3 +  \sqrt{ 109 } }{2}

t =  \frac{3  -  \sqrt{ 109 } }{2}

t = 6.7 \\ t =  - 3.7

as \: we \: know \: time \: cannot \: be \: negative

\huge \therefore \: t = 6.7

You might be interested in
What does 81% 90% 80% and 34% average into 20 points
Alja [10]

Answer:

71.25%.

Step-by-step explanation:

To find the average, we can simply add up the percentages and divide by how many there are.

We can do this by:

\frac{81 + 90 + 80 + 34}{4} = 71.25%

7 0
3 years ago
Translate the question into a mathematical expression. The quotient of two and a number times seven
goblinko [34]

Answer:

2n * 7

Step-by-step explanation:

3 0
2 years ago
X plus -2 equals four
expeople1 [14]
X + (-2) = 4...
do the inverse +2 on both sides 4+2 equals 6. X= 6
4 0
3 years ago
Read 2 more answers
Segment YZ has endpoints (6, 3) and (3, 9). Find the coordinates of the point that divides the line segment directed from Y to Z
fenix001 [56]

Answer:

  (4, 7)

Step-by-step explanation:

The point of interest is ...

  P = (2Z +1Y)/(2+1) = ((2·3+6)/3, (2·9+3)/3)

  P = (4, 7)

__

The point that divides the segment into the ratio a:b is the weighted average of the endpoints, with the weights being "b" and "a". The weight of the first end point corresponds to the length of the far end of the segment.

8 0
3 years ago
Read 2 more answers
Dave bought a package of 4 chocolate cookies. Each cookie weighed 0.5 ounces. How much did the 4 cookies weigh all together? Ple
Sauron [17]
4 (cookies) X .5 ounces = 2 ounces
3 0
3 years ago
Other questions:
  • Tourists from a tour bus were asked about places they visited during their stay in a city. The results are shown in the table. W
    15·2 answers
  • What is the value of x^2+4 for x=5?<br>A)14<br>B)21<br>C)29<br>D)41<br>​
    6·2 answers
  • Mandy collected 4 times as many shells as Cameron. Together they collected 40 shells. How many shells did Mandy collect. Write a
    10·1 answer
  • F(x) = -(x-3) +x<br> What is f(-1) = ?
    9·1 answer
  • Can someone help me out?
    10·1 answer
  • Which property justifies the statement below?
    6·1 answer
  • the function f(x)=1/6{2/5}x is reflected across the y axis to create the function g(x). which ordered pair is on g(x)
    15·2 answers
  • book world receives 12 boxes of books each box contains 16 copies of the new best-seller Norton's Last Laugh how many copies of
    9·1 answer
  • Math- look at the picture below
    13·2 answers
  • What value represents the horizontal translation from the graph of the parent function f(x) = x2 to the graph of the function g(
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!