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3 years ago

Solve the equation please 8[4-x]=7x+2

Mathematics

2 answers:

Blizzard [7]3 years ago

4 0

Answer:

x=2

Step-by-step explanation:

shtirl [24]3 years ago

4 0

Answer:

x=2

Step-by-step explanation:

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Q6: Which is the graph of the polar equation r=1/1-sin theta.

AveGali [126]

Answer:

The correct answer is C.

Step-by-step explanation:

The given equation is;

$r=\frac{1}{1-\sin(\theta)}$

This implies that;

$r(1-\sin(\theta)=1$

$r-r\sin(\theta)=1$

Let us write in Cartesian coordinates by substituting;

$r=\sqrt{x^2+y^2} ,y=r\sin(\theta)$

$\sqrt{x^2+y^2}-y=1$

$\sqrt{x^2+y^2}=y+1$

Square both sides;

$(\sqrt{x^2+y^2})^2=(y+1)^2$

This implies that;

$x^2+y^2=y^2+2y+1$

$x^2=2y+1$

$y=\frac{1}{2}x^2-\frac{1}{2}$

This is an equation of a parabola that opens upwards with a y-intercept of $-\frac{1}{2}$ .

The correct choice is C

4 0

4 years ago

There are 45 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time

zheka24 [161]

Answer:

Step-by-step explanation:

Let X be the random variable for the time needed to grade a randomly chosen first examination paper

X is N(5, 4)

Time taken=11.00-6.50=4hours 10 min=25/6 hours

P(X<25/6) =P(Z< $\frac{\frac{25}{6}-5 }{4} =P(Z$

=0.5-0.0832=0.0168

b) Time >11.10-6.50 = 4 hours 20 mint = 13/3 hours

P(X>13/3) = P(Z>-0.16) = 0.5636

6 0

3 years ago

A car valued at $15,000 depreciates 13% per year. What is the

Vinil7 [7]

Answer:

Value = $15,000 * (.87) ^ Years

After 4 years, .87 ^ 4 = 0.57289761

Value = $15,000 * 0.57289761 =

8,593.46

Step-by-step explanation:

3 0

4 years ago

The graph below has:

Debora [2.8K]

Answer:

One repetad linear

Step-by-step explanation:

3 0

3 years ago

What is the domain and range of the function y equals square root of 4 x plus 12 end root?

nikdorinn [45]

Answer:

Step-by-step explanation:

The function written symbolically is

f(x) = y = √(4x + 12)

Domain: Since 4x + 12 must be ≥ 0, x must be ≥ -3. [0, -3)

Range: The square root function may be zero or greater: [0, infinity)

6 0

4 years ago