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
Sergeeva-Olga [200]
3 years ago
7

ILL MARK BRAINIEST IF YOU DO THIS RIGHT!!! DO 9 AND 10!!!

Mathematics
1 answer:
yuradex [85]3 years ago
4 0
Number 9 is L is greater than or equal to 110
You might be interested in
Write each decimal as a fraction or mixed numbest form. -7.08
Andreas93 [3]
-(7+8/100)
= -(7+4/50)
= -(7+2/25)
= -177/25
7 0
3 years ago
A rocket is fired with an initial vertical velocity of 40 m/s from a launch pad 45 m high, and its height is given by the formul
N76 [4]

Answer:

1) 125 meters

2) For 9 seconds.

Step-by-step explanation:

The rocket's height is given by the formula -5t^2+40t+45.

Notice that this is a quadratic.

Part 1)

Since this is a quadratic, the highest height the rocket goes will be the vertex of our quadratic. Remember that the vertex of a quadratic in standard form is:

(-\frac{b}{2a}, f(-\frac{b}{2a}))

So, let's identify our coefficients. The standard quadratic form is:

ax^2+bx+c

Therefore, in this case, our a is -5, b is 40, and c is 45.

So, let's find the x-coordinate of our vertex. Substitute 40 for b and -5 for a. This yields:

x=\frac{-(40)}{2(-5)}

Multiply and reduce. So:

x=-40/-10=4

Now, substitute 4 for t to find the height. So:

-5(4)^2+40(4)+45

Evaluate:

=-5(16)+40(4)+45

Multiply and add:

=-80+160+45=125\text{ meters}

Therefore, the highest the rocket goes up is 125 meters.

Part 2)

To find out for how much time the rocket is in the air, we can think about after how many seconds after launch will the rocket land.

If the rocket lands, the height h will be 0. So, we can set our expression equal to 0 and solve for t:

-5t^2+40t+45=0

First, let's divide everything by -5. This yields:

t^2-8t-9=0

We can factor:

(t+1)(t-9)=0

Zero Product Property:

t+1=0\text{ or } t-9=0

Solve for t:

t=-1\text{ or } t=9

In this case, since t is our time in seconds, -1 seconds does not make sense. So, we can remove -1 from our solution set.

Therefore, 9 seconds after launch, the rocket will touch the ground.

Therefore, the rocket was in the air for 9 seconds.

And we're done!

6 0
3 years ago
HELP ME PLEASE AND EXPLAIN IT TOO! 28 Points!!!!!!!!!!
SIZIF [17.4K]
X=4
First find the solution to (x+1) ft. I chose to guess the answer as 4 and it worked (you’ll have to guess). I then plugged 4 into the other equation 2x. It became 2•4. Solving give the side length of 8 ft. Then you have to check to make sure they both have the same area. To do this just solve the equations.
First rectangle- 4•4= 16 ft area
Second rectangle- 2•8 = 16 ft area
( I’m really sorry if this is confusing)
4 0
3 years ago
What number is 120% of 12
Rasek [7]
120% of 12 is 14.4.I got this by doing this:

12/x=100/120
<span>(12/x)*x=(100/120)*x       - </span>we multiply both sides of the equation by x
<span>12=0.833333333333*x       - </span>we divide both sides of the equation by (0.833333333333) to get x
<span>12/0.833333333333=x </span>
<span>14.4=x </span>
<span>x=14.4</span>
5 0
3 years ago
Plz help ASAP!! Explain your answer! I will mark at brainliest!!!
Vera_Pavlovna [14]

The room is not in shape of a square but a rectangle.

Question says Length is: 19 inches

Diagonal is: 20.6 inches

In a square all sides are equal

Rectangle has just two sides equal

3 0
3 years ago
Other questions:
  • I need help with this ....!!!!!
    11·1 answer
  • A notebook costs $6.50 plus sales tax. After sales tax, the notebook is $6.89. What is the sales tax rate?
    14·2 answers
  • Yellow Cab Company charges $4 for the first mile plus
    13·1 answer
  • a journey to work takes a women three quarters of an hour. if she catches the bus at 7:55, when does she arrive?
    5·1 answer
  • A triangle has sides 42, 4x, and 2x−6. What is the possible range of x? <br><br>? &lt; x &lt; ?
    12·1 answer
  • If p(x)=2x^2 -4 and q(x)=x-3, what is (p*q)(x)
    15·2 answers
  • What is the volume of the right cylinder?
    13·1 answer
  • What is the value of y? <br><br><br><br> Thank you :)
    6·2 answers
  • Pleaseee helpp!! no links or i’m reporting
    11·1 answer
  • . Below are sinusoidal regressions created from the average monthly low temperatures in Iqaluit, Nunavut and Nairobi, Kenya. Com
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!