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
grin007 [14]
2 years ago
7

The area of a triangle is 11.5 square in the base is 23 in what is the height in inches

Mathematics
2 answers:
Mariana [72]2 years ago
7 0
  • Answer:

<em>h = 1 inches</em>

  • Step-by-step explanation:

<em>The area of a triangle = formula</em>

<em>A = b×h/2</em>

<em>2A = b×h</em>

<em>h = 2A/b</em>

<em />

<em>h = 2×11.5in²/23in</em>

<em>= 23in²/23in</em>

<em>= 1 in</em>

<em />

coldgirl [10]2 years ago
6 0

Answer:

Height = 1 inch

Step-by-step explanation:

area of triangle = 1/2 x base x height

       11.5 =1/2 x 23 x height

       23/23 = height

       height = 1

You might be interested in
A company is in the business of finding addresses of long-lost friends. The company claims to have a 70% success rate. Suppose t
Galina-37 [17]

Answer:

a) Figure attached

b) E(X) =\mu= np = 9*0.7=6.3

Sd(X) =\sigma= \sqrt{np(1-p)}= \sqrt{9*0.7*(1-0.7)}=1.375

c) For the case n= 6

P(X \leq 2) = 0.9891

For the case n= 5

P(X \leq 2) = 0.9692

So then we need at least  n=5 or n=6 to satisfy the condition required.

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=9, p=0.7)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Part a

For this case we can use the following R code:

> x <- seq(0,9,by = 1)

> y <- dbinom(x,9,0.7)

> plot(x,y,main="Histogram",type = "h")

And we can see on the figure attached the solution.

We see that the higher probabilities are from 4 to 9

Part b

The expected value is given by:

E(X) =\mu= np = 9*0.7=6.3

The variance is given by:

Var (X) =\sigma^2= np(1-p) = 9*0.7*(1-0.7)= 1.89

And the standard deviation is:

Sd(X) =\sigma= \sqrt{np(1-p)}= \sqrt{9*0.7*(1-0.7)}=1.375

Part c

First we can find the probability that at least two addresses will be found in the list of 9 that we have like this:

P(X \geq 2)

We can use the complement rule and we have:

P(X \geq 2) = 1-P(X

We find the indicidual probabilities:

P(X=0)=(9C0)(0.7)^0 (1-0.7)^{9-0}=0.00001968

P(X=1)=(9C1)(0.7)^1 (1-0.7)^{9-1}=0.000413

P(X \geq 2) = 1-[0.00001968+0.000413]=0.9996

If we use the case of n=8 and we find P(X\leq 2), we got:

P(X \leq 2) = 0.9987

For the case n= 7

P(X \leq 2) = 0.9962

For the case n= 6

P(X \leq 2) = 0.9891

For the case n= 5

P(X \leq 2) = 0.9692

So then we need at least  n=5 or n=6 to satisfy the condition required.

5 0
3 years ago
{[(8 × 3) ÷ 2] + 3} ÷ 5 =
lubasha [3.4K]

Answer:

3

Step-by-step explanation:

8x3=24

24/2=12

12+3=15

15/5=3

4 0
2 years ago
A volleyball court is shaped like a rectangle. it has a width of x meters and a length of 2x meters which expression gives the a
ANEK [815]

you don't list any expressions to choose from but

 if width = x

 and length = 2x

Area = 2x * x

 Area = 2x^2

8 0
3 years ago
Yuri has 12 counters He put them in 2 equal group How many counters are in each group
Andrej [43]

Answer: 6


Step-by-step explanation:

Counter= *

All of counters

************

group one          Group Two

******                       ******

8 0
2 years ago
Hi can you please help me with my work
xenn [34]
A, D, and E are true

One X on the line plot marks one time something happened. So the two x’s above the 1 means that he practiced piano for one hour (see to the right that says hours next to the numbers, so 1=1 hour) two times.

45 minutes is 3/4 of an hour, and is the mark right between 1/2 and 1. There is one x above this mark, so that means Thaddeus practiced for 45 minutes one time, so B is false

Thadeus practiced piano for 30 minutes two times, so C is false because he didn’t mostly practice for thirty minutes.

D is correct because there are 2 Xs above the 0, which means two times he practiced for zero hours, which means he didn’t practice at all.

E is correct because 15 minutes is 1/4 of an hour, so it is the mark between 0 and 1/2. We see there are three x’s there, so that means he practiced for 15 minutes 3 times.

I hope this helps! Let me know if you want me to explain it differently.
4 0
2 years ago
Other questions:
  • A bridge on a river is modeled by the equation h = -0.2d^2 + 2.25d, where h is the height and d is the horizontal distance. For
    13·1 answer
  • What is the surface area of the cylinder?
    5·1 answer
  • If a square had a perimeter of 20cm, find the length of the diagonal. round to the nearest tenth.
    9·1 answer
  • If lines joined each given point on the graph to the origin, which points would be on lines that represent a unit rate greater t
    5·1 answer
  • Chef Rita is cooking for a Sunday brunch. She knows that 22 pancakes can feed 8 people. She is wondering how many people ( p )sh
    9·1 answer
  • How is statement B related to statement A?
    15·1 answer
  • What is -7 as a fraction?
    7·1 answer
  • Determine if the set of numbers is in order from least to greatest. Explain. -5,3,-3,1,0
    12·1 answer
  • The length of a rectangle is represented by 9x - 5. The width of the rectangle is represented by 3.
    9·1 answer
  • 8x3+70÷7-7<br><br> tell accordingly the correct answer will be marked as brainliest
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!