I need help with this practice problem I need to know if I’m correct.

Answer:

(D). f(x) = [tex]-\frac{3}{2}[/tex] x² + [tex]\frac{17}{2}[/tex] x - 7  

Step-by-step explanation:

( x , y )

ax² + bx + c = y ............ ( 1 )

~~~~~~~~~~~~~~

( 2 , 4 ) --------> ( 1 )

a(2)² + b(2) + c = 4

4a + 2b + c = 4 .............. (2)

( 3 , 5 ) ---------> ( 1 )

a(3)² + b(3) + c = 5

9a + 3b + c = 5 ............... (3)

( 4 , 3 ) ----------> ( 1 )

a(4)² + b(4) + c = 3

16a + 4b + c = 3 .............. (4)

[tex]delta[/tex] = Δ = [tex]\left[\begin{array}{ccc}4&2&1\\9&3&1\\16&4&1\end{array}\right][/tex] = - 2

[tex]delta_{a}[/tex] = [tex]\left[\begin{array}{ccc}4&2&1\\5&3&1\\3&4&1\end{array}\right][/tex] = 3

[tex]delta_{b}[/tex] = [tex]\left[\begin{array}{ccc}4&4&1\\9&5&1\\16&3&1\end{array}\right][/tex] = - 17

[tex]delta_{c}[/tex] = [tex]\left[\begin{array}{ccc}4&2&4\\9&3&5\\16&4&3\end{array}\right][/tex] = 14

a = [tex]delta_{a}[/tex] / [tex]delta[/tex] = [tex]-\frac{3}{2}[/tex]

b = [tex]delta_{b}[/tex] / [tex]delta[/tex] = [tex]\frac{-17}{-2}[/tex] = [tex]\frac{17}{2}[/tex]

c = [tex]delta_{c}[/tex] / [tex]delta[/tex] = [tex]\frac{14}{-2}[/tex] = - 7

f(x) = [tex]-\frac{3}{2}[/tex] x² + [tex]\frac{17}{2}[/tex] x - 7   (D)

Hello

Question one requires us to find the value of the angle

Using trigonometric ratios

SOHCAHTOA

For question b, we can use trigonometric ratio to find the value of the missing side or use pythagoran's theorem

I would use pythagoran's theorem here because we would arriave at our answer faster

From the calculations above, the value of the angle is 38.7 degree and the missing side is 12.8 units

You can observe that angle 1 and angle with 47° are inside a parallelogram.

Consider that the sum of the internal angles of a parallelogram is 360°.

Moreover, consider that the angle at the top right of the parallogram is congruent with the angle of 47°, then, such an angle is if 47°.

Consider that angle down right side is congruent with angle 1, then, they have the same measure.

You can write the previous situation in the following equation:

47 + 47 + ∠1 + ∠1 = 360 simplify like terms

94 + 2∠1 = 360 subtract both sides by 94

2∠1 = 360 - 94

2∠1 = 266 divide by 2 both sides

∠1 = 266/2

∠1 = 133

Hence, the measure of angle 1 is m∠1 = 133°

Step 1. Gather all of the information.

Out of 100 students, 70 students are girls. This also means that the other 30 students are boys:

--> 70 girls, and 30 boys for every 100 students.

Step 2. Write a fraction in tenths and a fraction in hundredths to tell what fraction of the fourth-grade students are girls.

The fraction in hundredths:

To find the fraction in tenths, we simplify the previous fraction by dividing both numbers by 10, and the resulting numbers are 7 and 10.

The fraction in tenths:

Step 3. Write a fraction in tenths and a fraction in the hundredths to tell what fraction of the fourth-grade students are boys.

In this case, we use 30 instead of 70 because now we are talking about the number of boys.

The fraction in hundredths:

We do the same as we did in step 2 to find the fraction tenths, divide both numbers by 10, the result is 3 and 10.

The fraction in tenths:

Answer:

Write a fraction in tenths and a fraction in hundredths to tell what fraction of the fourth-grade students are girls

Write a fraction in tenths and a fraction in the hundredths to tell what fraction of the fourth-grade students are boys

For finding the solutions, you need to match the equations

For the next step, you should replace the value for x in any of the equations given

y=x+2

y=-2+2

y=0

(-2,0) Letter a

Explanation

Given: Leila purchased 21,5cm of wire for $17.20.

Required: To determine the unit price in dollars per centimeter.

This is achieved thus:

To determine the unit price per centimeter, we divide the cost by the length of wire as follows:

Hence, the answer is:

Let's begin by listing out the information given to us:

Angle U = 27°

TU is tangent to S implies this is a right triangle

Angle T = 90°

The sum of interior angles in a triangle is 180 degrees

U + T + S = 180°

⇒27 + 90 + S = 180

⇒S = 180 - (90 + 27) = 53

S = 53°

Given that the chemistry teacher needs to mix a 20% salt solution with an 80% salt solution to make 15 quarts of a 40% salt solution.

Let be "x" the number of quarts of 20% salt solution the teacher should mix to get the desired result, and "y" the number of quarts of 80% salt solution the teacher should mix to get the desired result.

You can write the following System of Equations using the information provided in the exercise:

In order to solve the exercise, you can use the Substitution Method:

1. Solve the second equation for "y":

2. Substitute the new equation into the first equation and solve for "x":

3. Substitute the value into the second original equation and solve for "y":

Hence, the answer is:

• 20% salt solution:

• 80% salt solution:

The strategies you can use to solve the equation 2000 = 20x + 10y are

1. if you have information on the values of y and x.

2. By establishing another relationship of y and x values. This relationship can now be solved simultaneously using substitution method or elimination method. Graphing can also be used to solve the equation.

Answer:

Given equation is, (Dollar value of a sandwich shop of a tip jar)

h is the number of hours since the shop opened.

a) To find the value where the tip jar increasing per hour.

we know that,

A slope of a line is the change in y coordinate with respect to the change in x coordinate.

The slope or gradient of a line is a number that describes both the direction and the steepness of the line. That gives the value of the rate of y with respect to x.

The equation of a line with slope and intercept is,

y=mx+c

where m is the slope.

The increasing value of a tip jar per hour is the slope of the given equation.

The slope of the ginen equation is,

we get,

$0.65 is value of the tip jar increasing per hour

Answer is: $0.65 is value of the tip jar increasing per hour.

b) To find the initial value of the tip jar when the shop opens.

Given equation is, (Dollar value of a sandwich shop of a tip jar)

h is the number of hours since the shop opened.

When the shop opens, we get that h=0

Substitute h=0 in the given equation we get,

Therefore, the initial value of the tip jar when the shop opens is $1.25.

Answer is: Therefore, the initial value of the tip jar when the shop opens is $1.25.

we have that

they have 24 boxes of markers 56 coloring books and 72 packages of modeling clay

so

24=(2^3)(3)

56=(2^3)(7)

72=(2^3)(3^2)

24/8=3

56/8=7

72/8=9

the number of backpacks is 8

therefore

teh answer is option B

SOLUTION:

Step 1:

In the question, we are given the following:

Find intervals of concavity and points of inflection of function

Step 2:

The details of the solution are as follows:

PART A:

Find intervals of concavity of function:

PART B:

Find the points of inflection of the function:

ANSWER

EXPLANATION

We want to find the length of the hose after 9 inches have been cut off.

First, convert the original length of the hose from feet to inches by multiplying by 12:

Next, subtract 9 inches from that value:

Finally, convert the length to feet by dividing by 12:

That is the answer.

Given the following equation:

You must solve for "x" as following:

1. Apply the Distributive property:

2. Observe the equation. You can notice that left side is equal to right side. If you try to solve for "x", you get:

Since the triangles are similar, that means the the prop

Solution

For this case we have the following number given:

We can see that x = -3 and y = - sqrt(3)

The angle is given by:

The radius would be:

And the polar form would be given by:

Answer:

The answer is D!!

Step-by-step explanation:

Right on edg 2022

Answer:

0.005461767627

Step-by-step explanation:

0.005461767627

filling in to send

SOLUTION

9. We want to find the product of c and 10.

Product means multiplication. So the product of c and 10 means

So we bring 10 and c together, to get 10c.

Hence the answer is 10c

Given:

Two intergers have a sum of 47 and a difference of 23.

Let's find the product of the two numbers.

Let x and y represent the numbers.

We have:

Two integers have a sum of 47: x + y = 47

Two integers have a difference of 23: x - y = 23

We gave the system of equations:

x + y = 47.......................equation 1

x - y = 23.......................equation 2

Let's solve the system simultaneously using substitution method.

Rewrite equation 1 for x:

x = 47 - y

Substitute (47 - y) for x in equation 2:

(47 - y) - y = 23

47 - y - y = 23

47 - 2y = 23

Subtract 47 from both sides:

47 - 47 - 2y = 23 - 47

-2y = -24

Divide both sides of the equation by -2:

Now, substitute 12 for y in either of the equations.

Let's take equation 1.

x + y = 47

x + 12 = 47

Subtract 12 from both sides:

x + 12 - 12 = 47 - 12

x = 35

Therefore, we have:

x = 35, y = 12

The numbers are 35 and 12.

To find the product of the numbers, let's multiply the numbers:

35 x 12 = 420

Therefore, the product of the numbers is 420.

ANSWER:

420

The value of x for the given triangle is 65°.

According to the question,

We have the following information:

A figure of triangle is given where two of its angles are 68° and 47°.

We know that the sum of all three angles of a triangle is 180°.

(More to know: all angles in an equilateral triangle are equal and in an isosceles triangle two angles are equal however the sum of three angles is 180°.)

So, we have the following expression:

x+68+47 = 180

x+115 = 180

x = 180-115

x = 65°

Hence, the value of x for the given triangle is 65°.

To know more about value of x here

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We can see from the question that we have the following function:

And we need to find the rate of change from x = 0 to x = 2.

1. To find the average rate of change, we need to remember the formula to find it:

And we also have the average rate of change for a function, f(x) between x = a and x = b is given by:

2. Then we have that the average rate of change between x = 0 and x = 2 is as follows:

3. However, we need to find the values for the function when f(2) and f(0). Then we have:

And we also have:

4. Finally, the average rate of change is given by:

Therefore, in summary, we have that the average rate of change of the function:

The factoYou ar/zero product property is the most efficient method for solving the equation

The given quadratic equation can be factored as:

The factor/zero product property is the most efficient method for solving the equation

QUESTION 4 of 10: A "direct response" social media advertisement offers a 50% discount at your restaurant for one of two people dining

together as a couple on Valentine's Day. The discount will apply to the lower priced meal. One meal will cost $24.77 and the other costs

$22.56. What will the total cost of the check be with the discount?

a) $24.77

b) $34.95

c) $36.05

d) $47.33

step 1

apply discount to the lowe price

so

the lower price is $22.56

50%=50/100=0.50

0.50(22.56)=$11.28step 2

step 2

adds the costs

11.28+24.77=$36.05

therefore

answer C

The distance travelled by the ball is 0.9076 feet.

Foucault used a pendulum to demonstrate the earth’s rotation. There are now over 30 Foucault pendulum displays in the United States. The Foucault pendulum at the Smithsonian Institution in Washington, DC, consists of a large brass ball suspended by a thin 52-foot cable. The ball swings at an angle of 1°. We have to find the distance travelled by the ball.

The ball travels in a circular motion. The radius of the circle is equal to the length of the cable. The distance travelled by the ball is equal to the arc length traversed in circular motion. Let the radius, angle, and distance be denoted by the variables "r", "θ", and "d", respectively.

r = 52 feet

We need to convert the angle from degrees into radians.

θ = 1°

θ = 1°*(π/180°)

θ = π/180

The formula for arc length is used below to calculate the distance.

d = r*θ

d = 52*(π/180)

d = 0.9076

To learn more about distance, visit :

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x,y) ---------> (2/3x, 2/3y)

1) For that dilation, we always start from the pre-image. In this case, the ABC is the bigger one

So taking one point of that triangle as an example.

C(9,3)

And one of that image

C'( 6,2)

Dilating from C to C' all other points follow that same rule.

2) This leads us to conclude

Pre image Image

(x,y) ---------> (2/3x, 2/3y)

If you subtract 2x from both sides of the equation you have:

Therefore, if you subtract 2x both sides, the equation will look like

Explanations:

Let the numerator of the fraction be x and let the denominator be y.

Hence, the original fraction is:

It is given that the denominator is 3 more than the numerator. It follows that:

It is also given that when both the numerator and denominator are increased by 4, the new fraction is equal to 3/4. This implies mathematically to the equation:

Simplify this equation:

Substitute y=x+3 into this equation:

Solve the equation for x:

Substitute x=5 into the equation y=x+3:

Hence, x=5, and y=8.

It follows that the original fraction is 5/8.

Answer:

The original fraction is 5/8.

Answer:

ohhh that one is hard but i think is ur mom

Step-by-step explanation:

i wanted to wast y0our time but hopefully you get the answet