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
snow_tiger [21]
2 years ago
10

E=4i+3j A=5i finfd E.A=EAcos

Mathematics
1 answer:
Luba_88 [7]2 years ago
4 0

Answer:

theta = 36.87

Step-by-step explanation:

E.A= (4i+3j).5i= 20

|E| |A| =

| e| |a|   = \sqrt{4 ^{2}  +  {3}^{2}  }  \times 5 = 25

\cos(theta)  =  \frac{e.a}{ |e ||a | }  =  \frac{20}{25}  =  \frac{4}{5}  \\ theta =  \cos ^{ - 1} ( {.8} ) = 36.87

You might be interested in
Ibuki factored 12x^7as (4x^3)(3x^4)
Marina86 [1]

Answer:

Both are correct.

Step-by-step explanation:

The key understanding here is that you can factor a monomial in many different ways!

To check if any of the factorizations is correct, we can multiply the factors and see if their product is really 12x^712x

7

12, x, start superscript, 7, end superscript.

Hint #22 / 4

\begin{aligned} (\blueD{4}\maroonD{x^3})(\blueD{3}\maroonD{x^4})&=(\blueD{4})(\blueD{3})(\maroonD{x^3})(\maroonD{x^4}) \\\\ &=\blueD{12}\maroonD{x^7} \end{aligned}

(4x

3

)(3x

4

)

​

 

=(4)(3)(x

3

)(x

4

)

=12x

7

​

So Ibuki is correct!

Hint #33 / 4

\begin{aligned} (\blueD{2}\maroonD{x^6})(\blueD{6}\maroonD{x})&=(\blueD{2})(\blueD{6})(\maroonD{x^6})(\maroonD{x}) \\\\ &=\blueD{12}\maroonD{x^7} \end{aligned}

(2x

6

)(6x)

​

 

=(2)(6)(x

6

)(x)

=12x

7

​

So Melodie is also correct!

Both Ibuki and Melodie are correct.

8 0
3 years ago
Why maths is an abstract subject​
Alla [95]
Abstraction in mathematics is the process of extracting the underlying structures, patterns or properties of a mathematical concept, removing any dependence on real world objects with which it might originally have been connected, and generalizing it so that it has wider applications or matching among other abstract
7 0
3 years ago
I need help Pleaseeeee WILL GIVE BRAINLIEST
IrinaK [193]

Answer:

C.540 square cm

Step-by-step explanation:

The object is 6 times as big as the scale drawing. The area of the scaled object , to find the area of the object.. you have to multiply the area of the scaled object by the scale factor squared

15×6^2=15×36=540

The area of the object ia 540 square centimeters

5 0
3 years ago
Explain determination ?? please follow me gyus ​
icang [17]

Answer:

Determination is a positive emotional feeling that involves persevering towards a difficult goal in spite of obstacles. Determination occurs prior to goal attainment and serves to motivate behavior that will help achieve one's goal.

7 0
3 years ago
2x+4y+8=0 y x+2y−4=0
Snezhnost [94]

Answer: https://mathsolver.microsoft.com/en/solve-problem/2x+4y-8=0

Step-by-step explanation: you should find your answer there

7 0
3 years ago
Other questions:
  • Jason want to buy a CCTV but the CCTV cost Php549.99. But Jason have Php1000.
    8·1 answer
  • This handrail is made from congruent parallelograms. In parallelogram ABCD, AB = 17.5 , DE = 18, and angle BCD is 110º. Find the
    15·1 answer
  • Solve the system 8x + 2y = -3, 3x - 2y = 8
    8·1 answer
  • In a completely randomized experimental design involving five treatments, 13 observations were recorded for each of the five tre
    8·1 answer
  • Jamal recorded three values for measuring water in a graduated cylinder. The
    14·1 answer
  • Between which pair of consecutive integers does √111 lie
    9·2 answers
  • Wuch of the foliwing expressions has the greatest volume -​
    10·1 answer
  • Does anybody know how to solve this ? 1<10+k<7
    15·1 answer
  • In a scale used for a blueprint,
    12·1 answer
  • April has 5 milligrams of zinc and 0.25 milligrams of copper. How much more zinc does she have than copper?​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!