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
Inessa [10]
3 years ago
13

Solve. Okay here is 20 letters brainy

Mathematics
1 answer:
juin [17]3 years ago
6 0

Answer:

-12

Step-by-step explanation:

4 1/2 - 5 1/8 =  -0.625

7.5 x -0.625 = -12

You might be interested in
PLESEEEEEEEE SOMEONE HELP ME I DIDNT STUDY FOR THIS QUIZ
Nataly [62]

Answer:

Ans 1 :-6

And 2:- y=x²

And 3 :- ×= -2

7 0
3 years ago
Read 2 more answers
A balloon rises at the rate of 10 ft/sec from a point on the ground 100 feet from an observer. Find the rate of change of the an
lubasha [3.4K]

The rate of change of the angle of elevation of the balloon from the observer when the balloon is 100 feet above the ground is  1/20 degree/sec.

<h3>What is angle of elevation?</h3>

It is described as a relationship between an oblique line from the observer's eye to an item above his eye and the horizontal plane. This angle eventually develops above the surface. The angle of elevation is made in such a way that it is above the observer's eye, as the name suggests.

Calculation for the rate of change of angle of elevation-

According to the question,

A balloon rises at the rate of 10 ft/sec from a point on the ground 100 feet from an observer.

The balloon is 100 feet above the ground.

Let the height of the balloon be 'h' ft.

Then tanØ = h/100

h = 100tanØ

Differentiate the above equation with respect to time.

dh/dt = 100 sec² Ø (dØ/dt)

We know dh/dt = 10 ft/sec.

when h = 100

tanØ = 100/100 = 1/1

tanØ = Perpendicular/Base

On comparing above two equations,

Perpendicular = 1; Base = 1.

By Pythagoras the hypotenuse is,

H² = P² + B²

    = 1² + 1²

    = 2

H = √2

Now, calculate the value of cosØ.

cosØ = B/H = 1/√2

Squaring both side

cos² Ø = 1/2

sec² Ø = 1/cos² Ø

sec² Ø = 2

The main equation was,

dh/dt = 100 sec² Ø (dØ/dt)

Substitute the values,

dØ/dt = (dh/dt )/100 sec² Ø

         = (10)/(100×2)

dØ/dt = 1/20 degree/sec.

Therefore, the rate of change of the angle of elevation of the balloon from the observer is  1/20 degree/sec.

To know more about the angle of elevation, here

brainly.com/question/9817377

#SPJ4

8 0
2 years ago
Evaluate the expression 0.4 cubed
nordsb [41]

Answer:

the answer to 0.4 cubed is 0.064

3 0
3 years ago
Read 2 more answers
Simplify the problem.
Lelechka [254]

Answer:

C

Step-by-step explanation:

<em>Hope it helped</em>

5 0
3 years ago
Read 2 more answers
PLS HELP ME
ololo11 [35]

Answer:

A. The median of Set A is approximately

half of

the median of Set B.

B. The range of Set B is approximately

twice

the range of Set A.

C. The interquartile range of Set A is

less than

the interquartile range of Set B.

D. There is

little

overlap between the two data sets.

Step-by-step explanation:

Could you mark me brainlyest, im trying to rank

3 0
3 years ago
Other questions:
  • Three less than "x" is equal to 13
    13·2 answers
  • Draw a rectangular box with the origin and (4, 5, 6) as opposite vertices and with its faces parallel to the coordinate planes.
    5·1 answer
  • Which graph represents the solution to the system of inequalities?<br> x + y ≤ 4<br><br> y – x ≥ 1
    12·1 answer
  • If 400ml is used for 8 pancakes how much is used for 6
    9·2 answers
  • Is it more efficient to solve -3x+y=1 for x?why or why notes
    7·1 answer
  • Compute the radius of the circle with a circumference of<br> 109.9 millimeters.
    8·1 answer
  • Help I’ll mark u brainly !
    8·1 answer
  • For every pound a company spends on advertising, it spends 43 pence on its website. Express
    9·2 answers
  • What the answer?????????????????
    14·1 answer
  • The chu family can hike 3 miles per hour how long will it take them to hike 15 miles
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!