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
pshichka [43]
3 years ago
12

Please answer this!!!

Mathematics
2 answers:
strojnjashka [21]3 years ago
5 0

Answer:

12/13

Step-by-step explanation:

we know this is a right triangle, and we know that the hypotenuse is the longest side. so we can already say that the hypotenuse of the triangle is DF or 78.

when you draw it out, you find that the shortest leg is 30 and the second is 72 and the hypotenuse is 78. we also know that cosine is adjacent/hypotenuse. once you draw the triangle and notice which side is adjacent to angle F, just fit it into the formula and you get:

cos F = 72/78

cos F = 12/13

Goryan [66]3 years ago
4 0

Answer: Choice C. \frac{12}{13}

Step-by-step explanation:

  • It helps to draw a right triangle with hypotenuse DF=78, and adjacent EF=72.
  • Plug in cosine adjacent over hypotenuse and simplify.
You might be interested in
The perimeter of a rectangle is 100 yd. if its width is four times its length, what is the area?
7nadin3 [17]

<span>Length = l</span>

<span>
Width = w</span>

<span>
Perimeter = p = 100

</span>

<span>Perimeter of rectangle = 2(l+w)</span>

<span>
100 = 2 (4w + w)</span>

<span>
100 = 2(5w)</span>

<span>
100 = 10w</span>

<span>
100/10 = w</span>

<span>
10 = w</span>

<span>
w =  10



Area of rectangle = length * width</span>

<span>
a = l*w</span>

<span> a = 4w*w</span>

<span>
a = 4w^2............(1)</span>

<span>
Put the value of w in (1)</span>

<span>
a = 4(10)^2</span>

<span>
a= 4(100)</span>

<span>
a = 400 yd^2</span>

4 0
3 years ago
Which represents a quadratic function ?
mars1129 [50]

Answer:

\boxed{\boxed{B.\ f(x)=\dfrac{3}{4}x^2+2x-5}}

Step-by-step explanation:

Quadratic function-

It is a function that can be represented by an equation of the form f = ax^2 + bx + c, where a\neq 0

In a quadratic function, the greatest power of the variable is 2.

As in the first option the highest power is 3, so it is not a quadratic function.

Even though the power of x is 2 in the third option, but as it is in the denominator, so the overall power of x becomes -2. Hence it is not a quadratic function.

As the coefficient of x^2 is 0 in case of fourth option, so it is not a quadratic function.

Equation in option 2 satisfies all the conditions of quadratic function, hence it is the quadratic function.

8 0
4 years ago
Read 2 more answers
A rectangular prism has a height of 12 centimeters and a square base with sides measuring 5 centimeters. A pyramid with the same
Ahat [919]
A rectangular prism is a cuboid so volume of cuboid is base area x height which is 5x5x12=300
volume of pyramid is 1/3 x base area x height = 5x5x6x1/3=50 thus volume outside pyramid and inside cuboid is 300-50=250
3 0
3 years ago
Read 2 more answers
How to turn 1.15 as a decimal into a percentage
Valentin [98]
Multiply the number by 100, making this one 115%
6 0
3 years ago
Help is appreicated! (10 points!)
grigory [225]

Answer:

5

Step-by-step explanation:

5

6 0
4 years ago
Other questions:
  • ANSWER FAST PLEASE!!!
    12·1 answer
  • What’s the mean,median,and mode of 54,65,74,35,87 ?
    12·2 answers
  • On a coordinate plane, parallelogram H I J K is shown. Point H is at (negative 2, 2), point I is at (4, 3), point J is at (4, ne
    9·1 answer
  • WILL MARK BRANLIESTTT<br> What is the value of x?<br> A. 42°<br> B. 48<br> C. 64°<br> D. 84
    13·1 answer
  • WILL MARK BRAINLIEST AND THANK YOU!!! PLEASE HELP!!
    6·1 answer
  • A una feria asistieron 350 personas de las cuales dos tercios son adolescentes y un cuarto personas adultas y un quinto son los
    11·1 answer
  • Jill has 200 movies downloaded on her phone. Of these movies 24 are comedies. What percent of Jills movies are comedies?
    10·1 answer
  • Can someone help me plz
    5·1 answer
  • Plzzz help last test of the year marking brainliest
    7·1 answer
  • You roll a number cube with 6 sides two times. What is the probability of rolling a number greater than 2 and an odd number?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!