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
Brums [2.3K]
3 years ago
7

I need help with this math ​

Mathematics
2 answers:
ivann1987 [24]3 years ago
4 0

Answer: 105

Expination: i used a calculater

olga55 [171]3 years ago
4 0
H = 21 x 5
h = 105

Hope this helps
You might be interested in
Find the gradient of the line that passes through the points<br> (5, 1) and (2, -5)
Temka [501]

❤❤❤❤❤❤❤❤❤❤❤❤❤❤

Suppose :

a = ( 5 , 1 ) and b = ( 2 , - 5 )

______________________________________

We have following equation to find the slope of the line using two points :

slope =  \frac{y(b) - y(a)}{x(b) - x(a)}  \\

Now just need to put the coordinates in the above equation ;

slope =  \frac{ - 5 - 1}{2 - 5}  \\

slope =  \frac{ - 6}{ - 3}  \\

Negatives simpliflies

slope =  \frac{6}{3}  \\

slope =  \frac{3 \times 2}{3}  \\

slope =  \frac{2}{1}  \\

slope = 2

❤❤❤❤❤❤❤❤❤❤❤❤❤❤

3 0
3 years ago
Read 2 more answers
Beth is making fruit salad. She adds 4 grapes for every 2 strawberries. If she uses 20 strawberries, how many grapes will she us
tester [92]

Answer:

40 grapes

Step-by-step explanation:

20 strawberries / 2 = 10 strawberries

10 strawberries x 4 grapes = 40 grapes

5 0
3 years ago
Please look at the picture, I need help ASAP.
forsale [732]

See below for the proof that the areas of the lune and the isosceles triangle are equal

<h3>How to prove the areas?</h3>

The area of the isosceles triangle is:

A_1 = \frac 12r^2\sin(\theta)

Where r represents the radius.

From the figure, we have:

\theta = 90

So, the equation becomes

A_1 = \frac 12r^2\sin(90)

Evaluate

A_1 = \frac 12r^2

Next, we calculate the length (L) of the chord as follows:

\sin(45) = \frac{\frac 12L}{r}

Multiply both sides by r

r\sin(45) = \frac 12L

Multiply by 2

L = 2r\sin(45)

This gives

L = 2r\times \frac{\sqrt 2}{2}

L = r\sqrt 2

The area of the semicircle is then calculated as:

A_2 = \frac 12 \pi (\frac{L}{2})^2

This gives

A_2 = \frac 12 \pi (\frac{r\sqrt 2}{2})^2

Evaluate the square

A_2 = \frac 12 \pi (\frac{2r^2}{4})

Divide

A_2 = \frac{\pi r^2}{4}

Next, calculate the area of the chord using

A_3 = \frac 12r^2(\theta - \sin(\theta))

Recall that:

\theta = 90

Convert to radians

\theta = \frac{\pi}{2}

So, we have:

A_3 = \frac 12r^2(\frac{\pi}{2} - \sin(\frac{\pi}{2}))

This gives

A_3 = \frac 12r^2(\frac{\pi}{2} - 1)

The area of the lune is then calculated as:

A = A_2 - A_3

This gives

A = \frac{\pi r^2}{4} -  \frac 12r^2(\frac{\pi}{2} - 1)

Expand

A = \frac{\pi r^2}{4} -  \frac{\pi r^2}{4} + \frac 12r^2

Evaluate the difference

A =  \frac 12r^2

Recall that the area of the isosceles triangle is

A_1 = \frac 12r^2

By comparison, we have:

A = A_1 = \frac 12r^2

This means that the areas of the lune and the isosceles triangle are equal

Read more about areas at:

brainly.com/question/27683633

#SPJ1

5 0
1 year ago
Biff is 25 years older than Hannah today. Four years from now,Biff will be 6 times as old as Hannah will be. How old is Hannah t
gavmur [86]

Hannah is 1 year old today.

Step-by-step explanation:

Let,

Hannah = x

Biff = y

According to given statement;

y = x+25   Eqn 1

In four years;

y+4 = 6(x+4)   Eqn 2

Putting value of y from Eqn 1 in Eqn 2;

(x+25)+4=6x+24\\x+25+4=6x+24\\x+29=6x+24\\29-24=6x-x\\5=5x\\5x=5

Dividing both sides by 5

\frac{5x}{5}=\frac{5}{5}\\x=1

As x is age of Hannah, therefore,

Hannah is 1 year old today.

Keywords: linear equations, substitution method

Learn more about linear equations at:

  • brainly.com/question/4057490
  • brainly.com/question/4097107

#LearnwithBrainly

4 0
3 years ago
A small airplane is flying at a speed of 15,840 feet per minute. What is the airplane's speed in miles per hour?
Marat540 [252]

Answer:

im pretty sure you have to divide 15, 840 by 60 and you should get 0.264

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Find the domain and range, graph
    8·1 answer
  • Need help on 12,14,16
    14·1 answer
  • Aran moved a cone-shaped pile of sand that had a height of 6 ft and a radius of 3 ft. He used all of the sand to fill a cylindri
    7·1 answer
  • Someone please help on this
    12·1 answer
  • Which is bigger two thirds or four fifths?
    9·1 answer
  • Find the domain of f/g f(x)= sqrt 4-x^2 g(x)= sqrt 3x+4
    14·1 answer
  • .. Using a calculator, determine which is closest to V 19? <br><br> Answer: b=4.3
    11·1 answer
  • ‏In Problems 1 and 2 use Euler's method to obtain a four decimal approximation of the indicated value . Carry out the recursion
    8·1 answer
  • Remind me to never trust my gut.
    5·2 answers
  • What type of number is 24−16i? Choose all that apply. Group of answer choices Imaginary Complex Real
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!