x + 7y = 21
x + 4y = 15
Solve the simultaneous equations

Given:

[tex]cos(2x)=1-sin(x)[/tex]

Expanding using double angle formula,

[tex]1 - 2 \sin^{2} (x) = 1 - \sin(x) [/tex]

Rearranging into a single equation,

[tex]1 - 2 \sin^{2}(x) - 1 + \sin(x) = 0[/tex]

Combining like terms,

[tex] - 2 \sin^{2} (x) + \sin(x) = 0[/tex]

Now multiplying each term by -1,

[tex]2 \sin^{2} (x) - \sin(x) = 0[/tex]

Factor greatest common factors out,

[tex] \sin(x)(2 \sin(x) - 1) = 0[/tex]

Applying Zero property rule,

[tex] \sin(x) = 0 \: or \: 2 \sin(x) - 1 = 0[/tex]

• Solve the trignometric equation to find a particular solution,

[tex]x = 0 \: or \: x = π[/tex]

[tex] = > x = 2nπ \: or \: x = π + 2nπ[/tex]

• Find the union of the solution sets,

[tex]x = nπ[/tex]}

• Rearrange unknown terms to the left side,

[tex]2 \sin(x) = 1[/tex]

• Divide both sides of the equation by the coefficient of variable,

[tex] \sin(x) = \frac{1}{2} [/tex]

• Solve the trignometric equation to find a particular solution,

[tex]x = \frac{π}{6} \: or \: x = \frac{5π}{6} [/tex]

[tex] = > x = \frac{π}{6} + 2nπ \: or \: x = \frac{5π}{6} + 2nπ,n∈Z[/tex]

}

☆ Now finding the union of both sets

[tex]x = nπ \: or \: x = \frac{π}{6} + 2nπ \: or \: x = \frac{5π}{6} + 2nπ,n∈Z[/tex]

Hence, the answer is [tex]x = nπ \: or \: x = \frac{π}{6} + 2nπ \: or \: x = \frac{5π}{6} + 2nπ,n∈Z[/tex]

Step-by-step explanation:

(-3,5) and (x,y)

Slope = (y - 5)/[x - (-3)] = (y - 5)/(x + 3)

(y - 5)/(x + 3) = -1/4

y - 5 = -1/4(x + 3)

y - 5 = (-1/4)x - 3/4

y = (-1/4)x - 3/4 + 5

y = (-1/4)x + 17/4.

Answer: 2nd option

Step-by-step explanation:

Answer:

total bill amount + tip = $77.21

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

hope it helps.........

The term n is the initial amount that the television is to be sold.

We are told that the television in this case is to be sold at a discount piece. The implication of this is that there is something that has to be removed from the price of the television as it is sold.

We are told that what they are to remove from the price of the television is about $75  and that when this is done, the price of the television would be about $300. Thus n is the original price of the television.

Learn more about discount:https://brainly.com/question/3541148

#SPJ1

The variable n represents the initial value of the television

From the question, we have the following parameters that can be used in our computation:

Amount off = $75

New price = $300

When represented as the equation, we have

n - 75 = 300

Add 75 to both sides of the equation

So, we have the following representation

n = 375

This means that the initial price of the television is $375

Read more about equation at

https://brainly.com/question/2972832

#SPJ1

Answer:

-52/7 or 7 3/7

Step-by-step explanation:

-5 is also -35/7

2 3/7 is also 17/7

-35/7-17/7 = -52/7

-52/7 = 7 3/7

Answer:

-7 3/7

Step-by-step explanation:

-5 -2 3/7

Factor out the negative sign

-(5 + 2 3/7)

Write as a sum

-(5 + 2 + 3/7)

Calculate

-(7 + 3/7)

Write as a mixed number

-7 3/7

Hope this helps :)

The equation illustrates that the number of students that Branch B have will be 2100.

From the question, the number of students taking classes at RSM Branch A is 1.4 more than the number of students taking classes at RSM Branch B. If

Since Branch A has 1,650 students, the number of students that Branch B have will be:

= 1500(1.4)

= 2100

Learn more about equations on:

https://brainly.com/question/2972832

Answer:

81

Step-by-step explanation:

Answer:

i think it is 300 miles,,,,.......

Answer:

2.08 × 10^11

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Because 80% of 5,000=4,000 and if there is 5,000 then what is left?

1,000 because 4,000 to 5,000 is 1 more thousand

Also I need my tickets to the concert!

Answer:

1.) 5 1/4

2.)1 1/2

Step-by-step explanation:

umm.....

Answer:

1)  5 2/8

2) 1 2/6

Step-by-step explanation:

1) 2 7/8 + 2 3/8

Write these fractions as improper fractions.

23/8 + 19/8

Add the fractions

42/8

Write the answer as a mixed number.

5 2/8

2) 3 1/4 -1 3/4

Write these fractions as improper fractions.

13/4 - 7/4

Subtract the fractions

6/4

Write these fractions as improper fractions.

1 2/6

There are 1680 digits 2, 0, 2, and 2 as a 4-digit consecutively ordered block with no other digits between them

To determine the number of whole numbers, the following must be true

Case 1: If the sequence starts from the first digit

So, we have:

[tex]Case\ 1 = 3 * 1 * 2 * 1 * 10 * 10[/tex]

[tex]Case\ 1 = 600[/tex]

Case 2: If the sequence starts from the second digit

So, we have:

[tex]Case\ 2 = 9 * 3 * 1 * 2 * 1 * 10[/tex]

[tex]Case\ 2 = 540[/tex]

Case 2: If the sequence starts from the third digit

So, we have:

[tex]Case\ 3 = 9 * 10 * 3 * 1 * 2 * 1[/tex]

[tex]Case\ 3 = 540[/tex]

The total number of whole numbers is:

[tex]Total = 600 + 540 + 540[/tex]

[tex]Total = 1680[/tex]

Hence, there are 1680 6-digit whole numbers that the digits

Read more about combination and permutation at:

https://brainly.com/question/2292449

Answer:

Side BC and AD are the same lengths so a=21

Side BC = 14

Side AB = 37

Side CD = 37

Step-by-step explanation:

Hope this helps!

please mark as brainliest =D

Answer:

b

Step-by-step explanation:

Answer:

y=8

Step-by-step explanation:

Hope this helps!!

Given :-

To Do :-

Solution :-

Given equation to us is ,

→ y = 3x -1

As we know that , the slope intercept form of the line is ,

→ y = mx + c

where m is the slope and c is the y intercept .On comparing both , we have ,

So the graph will cut the y axis at (0,-1) . And will have a slope of 3 .

When y coordinate is 0 ,

So that ,

→ x - 0 / 0 -(-1) = 3

→ x/0+1 = 3

→ x/1 = 3

→ x = 3

Hence one other point is (3,0 ).

Now we may plot the graph using these two points (3,0) and (0,-1) .

For graph see attachment .

I hope this helps .

As a result, the slope is 1/5 and the y-intercept is 2, and the equation is written in slope-intercept form as y = (1/5)x + 2.

On a two-dimensional coordinate plane, the equation of a line is shown using the slope-intercept form. Y = mx + b, where m is the line's slope and b is the y-intercept, is how the equation is expressed. The pace at which the line is rising or dropping is indicated by the slope (m). It is the ratio of any two places on the line's vertical change (rise) to horizontal change (run). In other words, it informs you of the line's steepness. The line is rising from left to right if the slope is positive, and descending from left to right if the slope is negative.

given

We must find y in order to convert the equation 2x - 10y = -20 into slope-intercept form, which is represented by the formula y = mx + b, where m is the slope and b is the y-intercept.

2x - 10y = -20

Initially, we must separate the y term from the other terms by deducting 2x from both sides:

-10y = -2x - 20

The next step is to separate y by multiplying both sides by -10:

y = (2/10)x + 2

When we simplify the fraction, we obtain:

y = (1/5)x + 2

As a result, the slope is 1/5 and the y-intercept is 2, and the equation is written in slope-intercept form as y = (1/5)x + 2.

To know more about slope intercept visit:

https://brainly.com/question/19824331

#SPJ1

Answer:

The slope is 3/1

Y-intercept is at 0,1

Step-by-step explanation:

Answer:

a = 11c - 4

Step-by-step explanation:

7,18,29,40

constant difference = 11

now,

an = a+(n-1)d

or, an = 7+(n-1)11

or, an = 7 + 11n - 11

or, an = 11n - 4

Answer:

1440°

Step-by-step explanation:

(n - 2)180° - (10 - 2)180° = 8(180°) = 1440°

Answer:

1440 degrees

Step-by-step explanation:

formula for calculating sum of angles in a polygon is (n-2) 180 where n is 10 that's 10-2 which is 8 and 8 * 180 which is 1440

Answer:

option C gives, x = 8

Step-by-step explanation:

A.

[tex]\frac{5}{2}x+\frac{7}{2}=\frac{3}{4}x+14[/tex]

[tex]\frac{5}{2} x-\frac{3}{4} x = 14-3.5[/tex]

[tex]\frac{10}{4} x-\frac{3}{4} x = 10.5[/tex]

[tex]\frac{7}{4} x = 10.5[/tex]

[tex]x=\frac{10.5*4}{7}[/tex]

[tex]x = 6[/tex]

B.

[tex]\frac{5}{4}x-9=\frac{3}{2}x-12[/tex]

[tex]\frac{5}{4}x-\frac{3}{2}x=-12+9[/tex]

[tex]\frac{5-6}{4} x = -3[/tex]

[tex]-x = 4(-3)[/tex]

[tex]x =12[/tex]

C.

[tex]\frac{5}{4}x-2=\frac{3}{2}x-4[/tex]

[tex]\frac{5}{4}x-\frac{3}{2}x=-4+2[/tex]

[tex]\frac{5}{4}x-\frac{6}{4}x=-2[/tex]

[tex]-x = (-2)*4[/tex]

[tex]x=8[/tex]

D.

[tex]\frac{5}{2} x-7 = \frac{3}{4}x+14[/tex]

[tex]\frac{5}{2} x-\frac{3}{4}x = +14+7[/tex]

[tex]\frac{10}{4} x-\frac{3}{4}x = +21[/tex]

[tex]\frac{7}{4} x=21[/tex]

[tex]x= \frac{21*4}{7}[/tex]

[tex]x = 12[/tex]

Answer:

g(x) = 3^x -7

Step-by-step explanation:

In an exponential function like this, the constant at the end of the function represents the vertical shift. This means that the original function is shifted 2 units up. So, 9 units lower than +2 is -7. Thus, the new function, g(x), is g(x)=3^x - 7.
We can prove that g(x) is 9 units lower through y-intercepts. The function f(x) has a y-intercept of 3 and g(x) is -6. Since -6 is 9 lower than 3, we know that there is a 9 unit difference between the functions.

9, 30, 93, 282, 849

====================================================

Explanation:

The first term is 9 because of the notation [tex]a_1 = 9[/tex]

To get the second term, we use the recursive rule given to us which is

[tex]a_n = 3a_{n-1} + 3[/tex]

I recommend using parenthesis to separate things like this

[tex]a_n = 3(a_{n-1}) + 3[/tex]

If n = 2, then,

[tex]a_n = 3(a_{n-1}) + 3\\\\a_2 = 3(a_{2-1}) + 3\\\\a_2 = 3(a_{1}) + 3\\\\a_2 = 3(9) + 3\\\\a_2 = 27 + 3\\\\a_2 = 30[/tex]

The second term is 30.

You can use the same idea as above to find the third term, or you can use this slightly different approach

[tex]\text{third term} = 3*(\text{second term}) + 3\\\\\text{third term} = 3*(30) + 3\\\\\text{third term} = 90 + 3\\\\\text{third term} = 93[/tex]

To generate any new term, we first triple the previous term and then add on 3.

Answer:

The answer should be 236g.

Step-by-step explanation:

If we take the amount of flour used for the cake as 'x,' the flour used to make the scones would be (500-x)×2/3 as 2/3 of the remaining is used for the scones.

We know that 60g more flour is used for the cake.

So,

x-60=(500-x)×2/3

Cross multiply, and brng the 3 to the other side.

3(x-60)=(500-x)2

3x-180=1000-2x

Bring the x-terms to one side and the numbers to one side.

3x+2x=1000+180

5x=1180

Divide both sides by 5 to find x(the amount of flour used to make the cake)

Therefore,

x=236g

Answer:

3.5 Hours

Step-by-step explanation:

I do not know what measurement or timelapse you're looking for. But this should be the answer to it, no I don't have an explanation though.

The distance between the city and the house is 260 miles.

A mathematical statement that has a "equal to" symbol between two expressions with equal values is called an equation. as in 3x + 5 = 15, for instance. There are different types of equations like linear, quadratic, cubic, etc.

t              d

1             195

2            130

2.5         97.5

The distance will be calculated by the equation of the line,

y = mx + c

m = ( 130 - 195 ) / ( 2 - 1 )

m = -65

y = -65x + c

195 = -65 + c

c = 260miles

Hence, the distance will be 260 miles.

To know more about an equation follow

https://brainly.com/question/25824151

#SPJ2

Answer:

Step-by-step explanation:

If it is on a regular dart board and the dart is thrown four times, the probability of hitting the centre would be slim (obviously) but to be more precise it would be 1/4 - if not none at all.

I know this isn't as specific but I hope it will help :)

Step-by-step explanation:

According to the diagram:

The area is: