please help me I don't understand what to do​

The threes solutions to the given equation sec²x - secx = 2 are:

To solve: sec²x - secx = 2 on interval [0,2[tex]\pi[/tex])

When we set t = sec x, we get the quadratic equation:

As a result, we must seek solutions to the equations:

[tex][1] \sec x=2: \quad \cos x=\frac{1}{2} \rightarrow x_1=\frac{\pi}{3} ; \quad x_2=\frac{5 \pi}{3} ;$\\\text { [2] } \sec x=-1: \quad \cos x=-1 \rightarrow x_3=\pi ;[/tex]

Therefore, the three solutions are:

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The correct question is given below:
solve the equation sec²x - secx = 2 on interval [0,2[tex]\pi[/tex])

Answer:

Re arrange equation to make x the subject

X-3=4y

-3 will be moved to the other side of equal sign

in doing so, its sign will be be switched

so

x=4y+3

Answer:

Step-by-step explanation:

Compute the midpoint of the line segment with endpoints:

p_1 = (-4, 4) and p_2 = (5, -1)

The midpoint between (x_1, y_1) and (x_2, y_2) is their componentwise average:

((x_1 + x_2)/2, (y_1 + y_2)/2)

Substitute (x_1, y_1) = (-4, 4) and (x_2, y_2) = (5, -1):

= ((-4 + 5)/2, (4 - 1)/2)

-4 + 5 = 1:

= (1/2, (4 - 1)/2)

4 - 1 = 3:

Answer:  = (1/2, 3/2)

Jorge's percent of markup based on the selling price is 34.78%.

The Percent markup based on Selling Price is calculating using the formula

Percent Markup = ( Markup/Selling Price )*100

In the given question

The Selling Price of chair = $230

Markup = $80

Substituting the values of Selling price and Markup in the Percent markup formula,

We get ,

Percent Markup = (80/230) * 100

=0.3478

=34.78

Therefore , the percent markup based on the selling price is 34.78%.

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Using the it's formula, the total opportunity cost of three unit(s) of tanks is of 350 autos.

The opportunity cost formula is given by:

C = F - A.

In which:

For this problem, we have that:

Thus:

F = 1000 - 650 = 350.

The total opportunity cost of three unit(s) of tanks is of 350 autos.

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Answer:

E

Step-by-step explanation:

2018 :   75 000 pines

2019 :     2000 pines / km^2  *  30 km^2 = 60 000 pines

(75 000 - 60 000) / 75 000 = .2        or 20 %  

Answer:

As the input gets smaller, the output gets smaller.

Step-by-step explanation:

The result of the expression, 18 x 4² + (9 – 3)² after simplification is 324.

What is an expression?

An expression can be defined as the combination of variables and constants with two or more operations applied to it. The operation can be addition, subtraction, multiplication and division.

Simplifying the expression

The given expression is 18 x 4² + (9 – 3)²

Using the BODMAS rule, we get,

= 18 x 4² + (6)²

= 18 × 16 + 36

= 288 + 36

= 324

Lila estimated it right.

The mistake that Rob might have made would be that he must have not solved (9 – 3)² the right way and gained the wrong answer.

Hence, the result of the expression, 18 x 4² + (9 – 3)² after simplification is 324.

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The equation as r + 2 r = 30 miles / 2 hours and the speed of faster cyclist as 10 miles per hour.

We are given that:

The distance between the two cyclist = 30 miles.

Now let the speed of one cyclist be x miles / hour.

Speed of other cyclist = 2 x miles / hour.

Now, 2 hours later they meet.

Distance covered by 1st cyclist in 2 hours = 2 x

Distance covered by 2st cyclist in 2 hours = 4 x

Equation will be:

2 x + 4 x = 30 miles

6 x = 30 miles

x = 5 miles.

Equation for the cyclist in terms of r will be :

r + 2 r = 30 miles / 2 hours

Speed of faster cyclist = 10 miles per hour.

Therefore, we get the equation as r + 2 r = 30 miles / 2 hours and the speed of faster cyclist as 10 miles per hour.

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Answer:

Step-by-step explanation:

By adding the laibilites together you get 1,800.

The sum to infinity of the sequence is 96/13

Given the nth term of a geometric sequence expressed as:

Tn = Σ12(-5/8)^n

The sum to infinity of the sequence is expressed as;

S∞ = a/1-r

where

a is the first term = 12

r is the common ratio = -5/8

Substitute

S∞ =  12/1-(-5/8)

S∞ = 12/1+5/8

S∞ = 12/(13/8)

S∞ =12 *8/13

S∞ = 96/13

Hence the sum to infinity of the sequence is 96/13

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Step-by-step explanation:

|2|=2

Hope this helps !!!!

Answer:

The absolute value is 2

Step-by-step explanation:

The absolute value is defined by how far a value is from zero and it is represented by a / /

/2/ = 2

For the installation of a decorative wall paper Tricia will need 70 ft of the border to decorate the wall of her master bedroom.

The measures of the room is 18 ft by 14 ft.

So, the length of the room (l) = 18 ft

The width of the room(w) = 15 t

As we know that, perimeter of rectangle is 2(l×w).

We will get perimeter of he room = 2l × 2w

                                                    = 2(18) × 2(14)

                                                    = 70 ft.

[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]

Here we go ~

Value of g (x) is -2, when :

[tex]\qquad \sf  \dashrightarrow \: - 2.5 < x \leqslant - 1.5[/tex]

And since -2 lies in this range of x,

[tex]\qquad \sf  \dashrightarrow \:g( - 2) = - 2[/tex]

Value of x is -1, when :

[tex]\qquad \sf  \dashrightarrow \: - 1.5 < x \leqslant - 0.5[/tex]

And -0.5 falls in this range, hence

[tex]\qquad \sf  \dashrightarrow \:g( - 0.5 ) = - 1[/tex]

Next, The value of x is 0 when :

[tex]\qquad \sf  \dashrightarrow \: - 0.5 < x < 0.5 [/tex]

But, it isnt equal to 0.5, since there is open interval at both extremes.

Next, Value of x is 1, when :

[tex]\qquad \sf  \dashrightarrow \:0.5 \leqslant x < 1.5[/tex]

And since it also has the value 0.5 included in it,

[tex]\qquad \sf  \dashrightarrow \:g(0.5) = 1[/tex]

Answer:

x=142°

Step-by-step explanation:

hope it helps ⁄(⁄ ⁄•⁄ω⁄•⁄ ⁄)⁄

The selling price if cost is $18.00 and the mark up is 70% is $30.60

What is mark  up?

The mark up means profit earned as percentage of the cost price, whereas margin means the profit is a  percentage of the selling price, in other words, the profit element to add to the cost price to derive the selling price in this case is 70% of the cost price of $18.00

profit(mark up)=70%*$18.00

profit(mark up)=$12.60

selling price=cost price+ profit(mark up)

selling price=$18.00+$12.60

selling price=$30.60

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Answer: Slope = 7/6

Step-by-step explanation:

The rectangle that is shaded has an area of 18 square units.

The framed rectangle is represented by the darkened area, while the frame is shown in white.

The frame's known width is two units, and both the rectangle and the frame have the following dimensions:

width = 7 units

length = 10 units

Now, if we remove the frame, each measure will lose 2*2 units, or 4 units (because for each measure we have the frame in both sides).

As a result, the measurements for the shaded rectangle are as follows:

width = 7 units - 4 units = 3 units

length = 10 units - 4 units = 6 units.

And since the product of a rectangle's width and length determines its area, we may calculate:

A = (3 units)*(6 units) = 18 square units.

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Answer: -25.9 or -25 9/10

Step-by-step explanation:

Answer:

-25.9

Step-by-step explanation:

-6.7 × 3 gives you -20.1 adding on the 5.8 gives you 25.9

Answer:

653209

Step-by-step explanation:

Because i did this already

The population variance ad standard deviation are 64 and 8 respectively.

The variance for a population is calculated by the below steps :

1) First find the mean (the average).

2) Subtracting the mean from each number in the data set and then    squaring the result. The results are squared to make the negatives value positive

3) Averaging the squared differences.

Here, the data set of population is given as :

population difference difference²

6                  -12                   144

12                 -6                     36

20                 2                       4

24                 6                     36

28                 10                  100

₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋

∑ 90                                  ∑ 320

Now, the average population will be :

∑ 90/5 = 18

Now finding the variance σ² using the formula :

σ² = ∑(x- x')²/N

σ² = 320/5

σ² = 64

Now, the standard deviation σ will be :

standard deviation = √σ²

standard deviation = √64

standard deviation = 8

Therefore, the population variance ad standard deviation are 64 and 8 respectively.

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adding a negative is the same as subtracting a positive

the expression -6+ (-2) is the same as -6-2 which is -8

Answer:

8 gallons left.......

Step-by-step explanation:

10 - 2 = 8

Pakistan's GDP is 13.27 trillion rupees.

GDP is the total value of all products manufactured and goods provided within that territory during a specific period.

We have,

Government purchases = 3.30 trillion rupees.

Individuals consume = 9.50 trillion rupees.

Individuals save = 5.44 trillion rupees.

Businesses invest = 1.20 trillion rupees.

Foreigners spend =0.50 trillion rupees to purchase Pakistani firms.

Pakistan imports = 2.13 trillion rupees.

Pakistan exports = 1.40 trillion rupees

GDP is given by:

C + I + G + NX

Where,

C = Consumption

I - Investment

G - Government Purchases

NX - Net Exports = Export - Import

So,

C = 9.50

I = 1.20

G= 3.30

NX =  ( 1.40 - 2.13 ) = -0.73

GDP = 9.50 + 1.20 + 3.30 - 0.73

GDP = 13.27 trillion rupees.

Thus Pakistan's GDP is 13.27 trillion rupees.

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Answer:

60 or 6x10^1 dogs in two days

Step-by-step explanation:

Saturday: 2x10^1 dogs

Sunday: 2(Saturday) = 2 (2x10^1)

-----------------------------------------------------

2x10 = 20

2(20) = 40

20 + 40 = 60

60 or 6x10^1 dogs in two days