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
alekssr [168]
3 years ago
13

Maly is going to throw a fair coin 70 times. Write down an estimate for the number of times the coin will land on head

Mathematics
1 answer:
ElenaW [278]3 years ago
8 0

Answer:

there are 2 sides for a coin

so divide 70/2 = 35

estimate for heads - 35

Step-by-step explanation:

You might be interested in
Which inequality represents all possible solutions of −6n<−12?
muminat

Answer:

B n>2

Step-by-step explanation:

−6n<−12

Divide each side by -6, remembering to flip the inequality

-6n/-6 > -12/-6

n >2

5 0
3 years ago
Twin​ brothers, Billy and​ Bobby, can mow their​ grandparent's lawn together in 53 minutes. Billy could mow the lawn by himself
podryga [215]
5353 minutes = 89.22 hours
Maybe the figures should be 53 and 20??

Let's let Billy = A
The formula to use for work problems is
Time = (A*B) / (A+B)

53 = ( (A +20)* A) / (A +20 + A) )
53 = ( A^2 + 20A ) / (2A + 20)
A^2 + 20A -106A -1060
A^2 -86A -1060
A = 96.935
Bobby Mows in 116.935 minutes

3 0
4 years ago
You are jumping off the 12 foot diving board at the municipal pool. You bounce up at 6 feet per second and drop to the water you
NARA [144]

Answer:

When do you hit the water?

1.075 seconds after you jump.

What is your maximum height?

the maximum height is 12.5626 ft

Step-by-step explanation:

The equation:

h(t) = -16*t^2 + 6*t + 12

Is the height as a function of time.

We know that the initial height is the height when t = 0s

h(0s) = 12

and we know that the diving board is 12 foot tall.

Then the zero in h(t)

h(t) = 0

Represents the surface of the water.

When do you hit the water?

Here we just need to find the value of t such that:

h(t) = 0 = -16*t^2 + 6*t + 12

Using the Bhaskara's formula, we get:

t = \frac{-6 \pm \sqrt{6^2 - 4*(-16)*12} }{2*(-16)} = \frac{-6 \pm 28.4}{-32}

Then we have two solutions, and we only care for the positive solution (because the negative time happens before the jump, so that solution can be discarded)

The positive solution is:

t = (-6 - 28.4)/-32 = 1.075

So you hit the water 1.075 seconds after you jump.

What is your maximum height?

The height equation is a quadratic equation with a negative leading coefficient, then the maximum of this parabola is at the vertex.

We know that the vertex of a general quadratic:

a*x^2 + b*x + c

is at

x = -b/2a

Then in the case of our equation:

h(t) = -16*t^2 + 6*t + 12

The vertex is at:

t = -6/(2*-16) = 6/32 = 0.1875

Evaluating the height equation in that time will give us the maximum height, which is:

h(0.1875) =  -16*(0.1875 )^2 + 6*(0.1875) + 12 = 12.5626

And the height is in feet, then the maximum height is 12.5626 ft

6 0
3 years ago
What is m ∠ ZUB?<br> 23.7°<br> 32.8°<br> 33.5<br> 57.2°
oee [108]

Answer:

23 .7 ruim

57.2 sol

32 .8 mais ou menos

tchau bj

3 0
3 years ago
WILL MARK AS BRAINLIEST!!! Write a numerical expression for the phrase, then simplify it. The product of 13 and the difference b
hjlf

" · " - product

" - " - difference

13 · (8 - (-10)) = 13 · (8 + 10) = 13 · 18 = 234

5 0
3 years ago
Other questions:
  • What is the median of the data (180,175,163,186,153,194,198,183,187,174,177,196,162,185,174,195,164,152,144,138,125,110)
    8·2 answers
  • The perimeter of a triangle is 35 feet. One side of the triangle is five feet longer than the second side. The third side is thr
    9·1 answer
  • If the state sales tax rate is 8%, how much money will you need to purchase a pair of jeans costing $29.99 and a shirt costing $
    7·2 answers
  • 1 ghjbjjhuijjdfjhchjnn bhjj
    5·1 answer
  • PLEASE HELP !!! WILL MARK BRAINLIEST TO WHOEVER GETS IT RIGHT !!
    9·2 answers
  • Anyo ne can ms on this <br><br>navneet175285 <br><br>e mail ​
    13·1 answer
  • Find the value of the variable.
    9·1 answer
  • I need help with that one please
    10·1 answer
  • Select the correct answer.
    5·1 answer
  • Sadie models her
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!