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
makvit [3.9K]
3 years ago
7

3y-2x-4x+5x+7 please help meeeeeeeeeeee

Mathematics
2 answers:
Cloud [144]3 years ago
6 0

Answer:

3y-2x-4x+5x+7

please help meeeeeeeeeeee

Goryan [66]3 years ago
5 0

3y-2x-4x+5x+7\\\\=3y-x+7

You might be interested in
Prove it. this question is from trigonometry ​
konstantin123 [22]

Answer:

See below for step-by-step proof.

Step-by-step explanation:

\textsf{Given expression}:

\cos^6 \theta+\sin^6 \theta

\textsf{Apply exponent rule} \quad a^{bc}=(a^b)^c:

\implies (\cos^2 \theta)^3+(\sin^2 \theta)^3

\textsf{Use the identity}\quad a^3+b^3=(a+b)^3-3ab(a+b):

\implies (\cos^2 \theta+\sin^2 \theta)^3-3 \cos^2 \theta\sin^2 \theta (\cos^2 \theta+\sin^2 \theta)

\textsf{Use the identity}\quad \sin^2 \theta + \cos^2 \theta=1:

\implies (1)^3-3 \cos^2 \theta\sin^2 \theta (1)

\implies 1-3 \cos^2 \theta\sin^2 \theta

\implies 1-3 (\cos \theta\sin \theta)^2

\textsf{Use the identity}\quad \sin 2 \theta=2 \sin \theta \cos \theta \implies \dfrac{1}{2}\sin 2 \theta= \sin \theta \cos \theta:

\implies 1-3 \left( \dfrac{1}{2}\sin 2 \theta\right)^2

\implies 1-\dfrac{3}{4} \sin^2 2 \theta

\textsf{Use the identity}\quad \sin^2 2\theta + \cos^2 2\theta=1 \implies \sin^2 2\theta=1-\cos^2 2\theta

\implies 1-\dfrac{3}{4} \left(1-\cos^2 2 \theta\right)

\implies 1-\dfrac{3}{4} +\dfrac{3}{4}\cos^2 2 \theta

\implies \dfrac{1}{4} +\dfrac{3}{4}\cos^2 2 \theta

\textsf{Factor out }\dfrac{1}{4}:

\implies \dfrac{1}{4}\left(1+3\cos^2 2 \theta\right)

\textsf{Use the identity}\quad \cos (4 \theta)=2 \cos^2 2\theta - 1 \implies \cos^2 2 \theta=\dfrac{1}{2}\cos 4 \theta+\dfrac{1}{2}:

\implies \dfrac{1}{4}\left(1+3\left(\dfrac{1}{2}\cos 4 \theta+\dfrac{1}{2}\right)\right)

\implies \dfrac{1}{4}\left(1+\dfrac{3}{2}\cos 4 \theta+\dfrac{3}{2}\right)

\implies \dfrac{1}{4}\left(\dfrac{5}{2}+\dfrac{3}{2}\cos 4 \theta\right)

\implies \dfrac{1}{4} \cdot \dfrac{1}{2}\left(5+3\cos 4 \theta\right)

\implies \dfrac{1}{8}\left(5+3\cos 4 \theta\right)

6 0
2 years ago
What value of x makes this equation true?<br> 4r - 10 = 18
Bond [772]
X= 7
This is because of you plug in 7 for x into the equation it will give you 28-10 which is 18.
6 0
3 years ago
Find the probability of the indicated event if P(E) = 0.25 and P(F) = 0.40.
Wewaii [24]

Answer:

P(E\ or\ F) = 0.60

Step-by-step explanation:

Given

P(E) = 0.25

P(F) = 0.40

P(E\ and\ F) = 0.05

Required

Determine P(E or F)

This is calculated using:

P(E\ or\ F) = P(E) + P(F) - P(E\ and\ F)

P(E\ or\ F) = 0.25 + 0.40 - 0.05

P(E\ or\ F) = 0.60

4 0
3 years ago
Sarah used 3/4 pound of blueberries to make 1/2 cup of Jam. How many pounds of blueberries would she need for 1 cup of jam
Ymorist [56]
1 / 4 cup of blueberries
5 0
3 years ago
If ABC is congruent to DBE find x
murzikaleks [220]

Answer:

x=44 degrees

Step-by-step explanation:

5y-4 has to equal 81 in order for the two triangles to be congruent.

The sum of the interior angles of a triangle is always 180 degrees.

81+51=132 degrees

180-132=48

x+4=48

x=48-4

x=44 degrees

6 0
3 years ago
Read 2 more answers
Other questions:
  • 3 over fourteen times seven
    5·1 answer
  • Jim Ryan, an owner of a Burger King restaurant, assumes that his restaurant will need a new roof in 7 years. He estimates the ro
    14·1 answer
  • The lowest or highest point of a function (never a linear function, though).<br> I
    9·1 answer
  • Please help me really urgent !!!
    11·2 answers
  • Can someone please explain number 6 to me ! :((
    5·1 answer
  • Please help me now this is math
    14·2 answers
  • What is 3 3/8+ 5/12=_____.Plz tell me!
    6·1 answer
  • The surf instructor has an initial fee of $12 and charges $8 per hour for lessons, which is represented by the equation y = 8x +
    11·1 answer
  • ( PLEASE HELP )Use the table to write a proportion .
    14·1 answer
  • Donna borrowed $3000 from a bank for 2 years and was charged simple interest. The total interest that she paid on the loan was $
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!