complete the solution of the equation. find the value of y when x equals 20. -2x+4y=-4

Answer:

1: f; 110

2: b; 70

3: e; 105

4: c; 75

5: a; 35

Step-by-step explanation:

Start with one that is easy to find, like 5, 4, or 3.

5. We know that 5 is on a 180 degree line with the angle of 145. Subtract 145 from 180 to find 5. This angle is 35.

4. We also know that 4 is a vertical angle to 75, which means 4 will also be 75.

3. Solve like you did for 5. 180 - 75 = 105.

2. First, find another angle inside the triangle shape. Look at the angle for 5 for this one. We know it is 35. That means the vertical angle inside is also 35. Subtract both interior angles to find 2. 180 - 75 - 35 = 70.

1. Finally, take the angle you got for 2, 70, and subtract it from the straight line, 180. 180 - 70 = 110.

Answer:

1: f; 110

2: b; 70

3: e; 105

4: c; 75

5: a; 35

Step-by-step explanation:

Answer:

(9, 3)

Step-by-step explanation:

I'd strongly suggest that you write these two equations one above the other:

x-2y=3

2x-3y=9

Let's eliminate x by addition / subtraction:  Multiply the first equation by -2 to obtain -2x in the first row over +2x in the second row:

-2x + 4y = -6

2x -  3y =  9

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

           y = 3

Now subst. 3 for y in the first equation:  x - 2y = 3 becomes:

x - 2(3) = 3, or

x = 6 + 3  =  9

The solution is (9, 3).

Answer:

y = 15x + 20

Step-by-step explanation:

He charges a flat rate of $20, so any total for hours worked will have an additional $20 added to it.  

The 15x represents his earnings per hour.  He makes 15 per every hour worked, x represents the number of hours worked

A card shuffling machine picks cards from a standard deck.

Answer:

Vertical Shrink by 1/2 and down 5

Answer:

The transformations are a rotation and a translation.

Answer:

the answer is 87.5%

Step-by-step explanation:

first, we have to turn 7/8 into a fraction with a denominator of 100. to do that, we can divide 100 by 8 to get 12.5. now, we multiply 7/8 x 12.5 which equals 87.5/100 which is equal to 87.5%

Answer: the answer would be 90%

Step-by-step explanation:

Answer:

1/4 or 0.25

Step-by-step explanation:

*I'm assuming you're asking about the probability of this happening...

There are 4 different results you can get when flipping a coin twice...

First Flip: heads

Second Flip: tails

First Flip: heads

Second Flip: heads

First Flip: tails

Second Flip: heads

First Flip: tails

Second Flip: tails

only one of these is heads, then tails, so our probability is

1/4, or 0.25

Step-by-step explanation:

How to simplify

-6x (some sign, it didn't show in the question)30

Divide by -6 on both sides to isolate the variable.

30 divided by -6 is -5, so x=-5.

Answer:

,

Step-by-step explanation:

Answer:For a system of equations, we'll use something fairly simple:

y = 2x (linear)

y = x^2 (quadratic)

Now to solve, we can set them equal to each other since they are both equal to y.

x^2 = 2x

Now to solve for the appropriate values of x, set equal to zero and factor.

x^2 = 2x ---> subtract 2x from both sides

x^2 - 2x = 0 ----> now factor out an x.

x(x - 2) = 0

Now to get the values of x, set each factored part equal to 0 on their own.

x = 0

x - 2 = 0

x = 2

A system of equations that includes a linear equation (y = 2x + 4) and a quadratic equation (y = x^2 - x - 6) can be solved algebraically by equating the two equations and solving the resultant quadratic equation. The solutions to this system are (5,14) and (-2,0). These solutions are the intersection points of the line and the parabolic curve on a coordinate plane.

To create a system of equations that includes both a linear and a quadratic equation we might choose for example:

Linear equation: y = 2x + 4

Quadratic equation: y = x^2 - x - 6

Part 1: The algebraic solution is found by setting the two equations equal to each other and solving for x:

2x + 4 = x^2 - x - 6

This simplifies to: 0 = x^2 - 3x - 10

Then, we factor to find: (x - 5)(x + 2) = 0

Setting each factor equal to zero gives us: x = 5 and x = -2

Substitute back into the linear equation to find y: y1= 2(5) + 4 = 14 and y2= 2(-2) +4 = 0

Hence, the solution to the system of equations are (5,14) and (-2,0).

The solutions would be graphically represented by the intersection points of the line and the parabola on the coordinate plane.

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Answer:

45%

Step-by-step explanation:

It is 45% because is 1/4 of the circle

Answer:

37.5%

Step-by-step explanation:

The probability is 3/8, which is 37.5%.

Final answer:

To find the probability that the red die shows an even number or the green die shows an even number, we can use the concept of probability of a union of two events. The probability is 3/4.

Explanation:

To find the probability that the red die shows an even number or the green die shows an even number, we can use the concept of probability of a union of two events. Let's denote the event that the red die shows an even number as E and the event that the green die shows an even number as F.

Since each die has 6 equally likely outcomes, the probability of rolling an even number on the red die is P(E) = 3/6 = 1/2, and the probability of rolling an even number on the green die is P(F) = 3/6 = 1/2.

To find the probability of the union of two events (E or F), we add the probabilities of E and F and subtract the probability of their intersection (E and F) to avoid double-counting. In this case, the intersection is the event that both dice roll an even number, which has a probability of P(E and F) = (1/2) × (1/2) = 1/4.

Therefore, the probability that the red die shows an even number or the green die shows an even number is P(E or F) = P(E) + P(F) - P(E and F) = 1/2 + 1/2 - 1/4 = 3/4.

Answer:

factor left the side of the equation

(2k_9)(k+2)=0

set factors equal to 0

2k_9=0 or k+2=0

the answer is K= 9/2 or K =-2

2k^2 - 5k - 18 = 0 can be solved by splitting the middle term to get k = -2 and k = -4.5.

An equation can be solved by many methods which include using the quadratic formula, splitting the middle term, etc. When an equation is solved, it means we are finding the value of the variable in the equation.

Given : 2k^2 - 5k - 18 = 0

2k^2 - 5k - 18 = 0

⇒ 2k^2 +4k - 9k - (9*2) = 0

⇒ 2k( k + 2 ) -9( k + 2 )  = 0

⇒ ( 2k - 9 )( k+2 ) = 0

⇒ k = 4.5, k = -2

Therefore, we have solved 2k^2 - 5k - 18 = 0 to get k = 4.5 and k = -2.

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Answer:   0.93 radians & 2.21 radians

Step-by-step explanation:

[tex]-4sin^2\theta-3sin\theta+5=0\\\\\text{Since this is not factorable, use the quadratic formula to find the roots:}\\\\sin\theta=\dfrac{-(-3)\pm \sqrt{(-3)^2-4(-4)(5)}}{2(-4)}\\\\\\.\quad=\dfrac{3\pm \sqrt{9+80}}{-8}\\\\\\.\quad=\dfrac{3\pm\sqrt{89}}{-8}\\\\\\.\quad=\dfrac{3\pm9.43}{-8}\\\\\\.\quad=\dfrac{12.43}{-8}\quad and\quad \dfrac{-6.43}{-8}\\\\\\.\quad=-1.55\quad and\quad 0.80\\\\\\\theta=sin^{-1}(-1.55)\quad and\quad \theta=sin^{-1}(0.80)[/tex]

[tex]\theta=not\ valid\qquad and\quad \theta=0.927[/tex]

[tex]\theta = 0.927\ radians\text{\ in the 1st quadrant and}\\\pi-0.927=2.21\ radians\text{\ in the 2nd quadrant}[/tex]

Answer:

2.21

0.93

Step-by-step explanation:

Given that; [tex]-4\sin^2\theta-3\sin \theta+5=0[/tex]

This is a quadratic equation is [tex]\sin \theta[/tex], where [tex]a=-4,b=-3,c=5[/tex]

We want to solve for [tex]\theta[/tex] in radians, where 0≤θ<2π.

We apply the quadratic formula given by;

[tex]\sin \theta=\frac{-b\pm\sqrt{b^2-4ac} }{2a}[/tex]

We substitute the given values to obtain;

[tex]\sin \theta=\frac{--3\pm\sqrt{(-3)^2-4(-4)(5)}}{2(-4)}[/tex]

Simplify;

[tex]\sin \theta=\frac{3\pm\sqrt{9+80}}{-8}[/tex]

[tex]\sin \theta=\frac{3\pm\sqrt{89}}{-8}[/tex]

[tex]\sin \theta=0.804[/tex] or [tex]\sin \theta=-1.55[/tex]

When [tex]\sin \theta=0.804[/tex] , [tex]\theta=\sin^{-1}(0.804)[/tex]

[tex]\Rightarrow \theta=0.93[/tex] --In the first quadrant.

In the second quadrant;

[tex]\theta=\pi-0.93=2.21[/tex]

When [tex]\sin \theta=-1.55[/tex] , [tex]\theta[/tex] is not defined.

Answer:

show me the other picture and closer up

Step-by-step explanation:

Answer:

The missing coefficient is -8

Step-by-step explanation:

Let

a------> the missing coefficient

we have

[tex]ay^{2}-[-5y-y(-7y-9)]-[-y(15y+4)]=0[/tex]

[tex]ay^{2}-[-5y+7y^{2}+9y]-[-15y^{2}-4y]=0\\ \\ ay^{2}+5y-7y^{2}-9y+15y^{2}+4y=0\\\\ay^{2}-7y^{2}+15y^{2}=0\\\\ay^{2}+8y^{2}=0\\ \\a=-8[/tex]

The equation is X + 14 = 23.

To solve for X subtract 14 from each side:

x+14 = 23

x = 23 - 14

x = 9

x+14=23

x=23-14

x=9

9+14=23

Answer:

24 cm²

Step-by-step explanation:

Using proportion to solve

let the area of the smaller triangle be x, then

[tex]\frac{5}{2}[/tex] = [tex]\frac{60}{x}[/tex] ( cross- multiply )

5x = 120 ( divide both sides by 5 )

x = 24

Area of smaller triangle = 24 cm²

Answer:

Step-by-step explanation:

[tex]Let\\A_1,\ A_2-areas\ of\ triangles\ (A_1>A_2)\\\\A_1=60\ cm^2\\\\A_1:A_2=5:2\\\\\text{Substitute:}\\\\\dfrac{60}{A_2}=\dfrac{5}{2}\qquad\text{cross multiply}\\\\5A_2=(60)(2)\\\\5A_2=120\qquad\text{divide both sides by 5}\\\\A_2=24\ cm^2[/tex]

Answer:

It is similar to triangle ABC and has coordinates A'(2, -3), B'(1, -4), and C'(-5, 2)

Answer:

The function translated 4 units right and 9 units down

The third answer

Step-by-step explanation:

* To solve the problem you must know how to find the vertex

  of the quadratic function

- In the quadratic function f(x) = ax² + bx + c, the vertex will

 be (h , k)

- h = -b/2a and k = f(-b/2a)

* in our problem

∵ f(x) = x²

∴ a = 1 , b = 0 , c = 0

∵ h = -b/2a

∴ h = 0/2(1) = 0

∵ k = f(h)

∴ k = f(0) = (0)² = 0

* The vertex of f(x) is (0 , 0)

∵ g(x) = -8x + x² + 7 ⇒ arrange the terms

∴ g(x) = x² - 8x + 7

∵ a = 1 , b = -8 , c = 7

∴ h = -(-8)/2(1) = 8/2 = 4

∵ k = g(h)

∴ k = g(4) = (4²) - 8(4) + 7 = 16 - 32 + 7 = -9

∴ The vertex of g(x) = (4 , -9)

* the x-coordinate moves from 0 to 4

∴ The function translated 4 units to the right

* The y-coordinate moves from 0 to -9

∴ The function translated 9 units down

* The function translated 4 units right and 9 units down

Final answer:

The question seeks the translation moving the vertex of f(x) = x^2 to match the vertex of g(x) = -8x + x² + 7. To achieve this, the function f(x) needs to be translated right by 4 units and down by 9 units, resulting in the translation (x, y) -> (x+4, y-9).

Explanation:

The student's question is asking for the translation that would move the vertex of a quadratic function f(x) to match the vertex of another quadratic function g(x). We are given two functions: f(x) = x2 and g(x) = -8x +  x² + 7. To find the translation, we need to determine the vertices of both parabolas.

In the standard form of a quadratic function, y = a x²  + bx + c, the vertex can be found using the formula h = -b/2a for the x-coordinate of the vertex. For f(x), the vertex is at (0, 0) since there is no b or c value, and it's just  x² . For g(x), we can calculate the vertex by finding the x-coordinate: h = -(-8)/2(1) = 4. The y-coordinate can be found by substituting x = 4 into g(x) to get g(4) = -8(4) + 4² + 7 = -32 + 16 + 7 = -9. Therefore, the vertex of g(x) is at (4, -9).

To translate the vertex of f(x) to the vertex of g(x), we need to shift it right by 4 units and down by 9 units. The translation that does this is (x, y) -> (x+4, y-9).

Answer:

28 times

Step-by-step explanation:

18 x 28 = 504

Answer:

p²(5p - 2)

Step-by-step explanation:

p² is a factor common to both terms, and thus should be factored out:

p²(5p - 2)

Answer:

7x -14=35        add 14 on both sides

7x= 49        then, divide 7 on the whole equation

x=7

Answer:

c

Step-by-step explanation:

the top pair and the middle pair

The number of lines of symmetry that this regular polygon have is: D. 5.

In Mathematics and Geometry, the order of rotational symmetry of any geometrical shape can be defined as the number of times in which the geometrical shape can be rotated around a full (complete) circle and still look the same.

As a general rule in geometry, a geometrical shape with number of sides (n) has "n" lines of symmetry and its order of rotational symmetry is equal to "n."

Based on the above rule, we can reasonably infer and logically deduce that the order of rotational symmetry for this geometrical figure is equal to 5 because a pentagon has five sides.

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Step-by-step explanation:

First we have to find percent change by doing change/original

To find change: 45000-18000=27000

Now divide by original. 27000/18000=1.5

The change was 150 percent. Now we multiply 45000 by 150 percent to get the projected population for 2015.

45000*1.5=67500 people

Brainliest? :)

Projected population for 2015 using exponential growth model is 112,500, calculated with initial population of 18,000 and growth rate.

To determine the projected population for 2015 using an exponential growth model, we need to identify the growth rate and use it to extrapolate the population.

The exponential growth model can be represented as:

[tex]\[ P(t) = P_0 \times e^{rt} \][/tex]

Where:

- [tex]\( P(t) \)[/tex] is the population at time [tex]\( t \)[/tex]

- [tex]\( P_0 \)[/tex] is the initial population (in 2005)

- [tex]\( r \)[/tex] is the growth rate

- [tex]\( t \)[/tex] is the time in years since the initial population was measured

First, we need to find the growth rate [tex](\( r \))[/tex]. We can use the data provided from 2005 to 2010:

[tex]\[ P_0 = 18000 \][/tex]

[tex]\[ P(5) = 45000 \][/tex]

Using these values in the formula:

[tex]\[ 45000 = 18000 \times e^{5r} \][/tex]

Now, let's solve for [tex]\( r \)[/tex]:

[tex]\[ \frac{45000}{18000} = e^{5r} \][/tex]

[tex]\[ 2.5 = e^{5r} \][/tex]

Taking the natural logarithm of both sides:

[tex]\[ \ln(2.5) = 5r \][/tex]

Now, divide by 5:

[tex]\[ r = \frac{\ln(2.5)}{5} \][/tex]

Now, we have the growth rate [tex]\( r \)[/tex]. We can use this rate to project the population for 2015 [tex](\( t = 10 \) years)[/tex]:

[tex]\[ P(10) = 18000 \times e^{\frac{\ln(2.5)}{5} \times 10} \][/tex]

Now, calculate this:

[tex]\[ P(10) = 18000 \times e^{\ln(2.5) \times 2} \][/tex]

[tex]\[ P(10) = 18000 \times e^{\ln(2.5^2)} \][/tex]

[tex]\[ P(10) = 18000 \times e^{\ln(6.25)} \][/tex]

[tex]\[ P(10) = 18000 \times 6.25 \][/tex]

[tex]\[ P(10) = 112500 \][/tex]

So, the projected population for 2015 is 112,500.

8 times because you take 4 times 2 and get 8

Reasoning:

There are 2 outcomes if you flip only one coin (H or T).

There are 2^2 = 2*2 = 4 outcomes if you flip two coins (HH, HT, TH, TT).

There are 2^3 = 2*2*2 = 8 outcomes if you flip three coins.

There are 2^4 = 2*2*2*2 = 16 outcomes if you flip four coins.

Answer:

she should have x-27 books left

Step-by-step explanation:

The number of books Henrietta has is x-13.

Given that, Garth has x books which are 20 more books than Henrietta has.

We need to find out how many books Henrietta now has.

In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

Now, the number of books with Garth has =x

The number of books with Henrietta has =x-20

Garth gave Henrietta 7 books =x-20+7

=x-13

Therefore, the number of books Henrietta has is x-13.

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Step-by-step explanation:

Parking lot:

Angie=x

Sister=x+12

Amom=2•(sister) or 2(x+12)=2x+24

Betty=x-3

Bmom=4•(betty) or 4(x-3)=4x-12

--------

Part A: Amom=2x+24

Part B: Bmom=4x-12

PartC:

x=angie

Amom=Bmom+6

2x+24=4x-12+6

2x+24=4x-6

24-6=4x-2x

18=2x

9=x

Angie is 9 years old.

Answer:

Exterior Angle Theorem states the exterior angle is the sum of the interior angles opposite it.

Angle 4 = 75

Step-by-step explanation:

The exterior angle theorem states that the two interior angles across from the exterior angle add to the degree of the exterior angle.

Angle 4 = 20 + 55 = 75

Answer:

200

Step-by-step explanation:

1/6 because the die has 6 sides so if you were to roll it 1200 times you would do 1/6*1200=200 , hope this helps!