what is the purpose of algebraic expressions?

Answer:

[tex]\tt x^2+3xy+4y^2[/tex]

Step-by-step explanation:

[tex]\tt(x-2y)^2+7xy\\\\=x^2-4xy+4y^2+7xy\\\\=x^2+3xy+4y^2[/tex]

Answer:

[tex] x^2 + 3xy + 4y^2 [/tex]

Step-by-step explanation:

[tex] (x - 2y)^2 + 7xy = [/tex]

[tex] = (x - 2y)(x - 2y) + 7xy [/tex]

[tex] = x^2 -2xy - 2xy + 4y^2 + 7xy [/tex]

[tex] = x^2 + 3xy + 4y^2 [/tex]

Answer:

cos 60° = 1/2

Step-by-step explanation:

* Lets explain how to solve the question

- If angle Ф lies in the first quadrant then sin Ф , cos Ф and tan Ф

 are positive values

- The equivalent angle of angle Ф in the second quadrant is 180° - Ф

 and sin Ф is positive but cos Ф and tan Ф are negative

- The equivalent angle of angle Ф in the third quadrant is 180° + Ф

 and tan Ф is positive but cos Ф and sin Ф are negative

- The equivalent angle of angle Ф in the fourth quadrant is 360° - Ф

 and cos Ф is positive but sin Ф and tan Ф are negative

* Lets solve the problem

∵ sin x = √3/2

∵ 90° < x < 180°

∴ ∠ x lies in the second quadrant

∴ m∠ x = 180° - Ф

- Let sin Ф = √3/2

∴ Ф = sin^-1 (√3/2)

∴ Ф = 60°

∵ x = 180° - Ф

∴ x = 180° - 60°

∴ x = 120°

- To find cos(x/2) divide 120° by 2

∵ cos (120°/2) = cos (60°)

∴ cos 60° = 1/2

Answer:

red apples

Step-by-step explanation:

cause for 1 pound, a red apple will cost 2 dollars, while for 1 pound, a green apple will cost less

Answer:

Red apples

Step-by-step explanation:

Since the cost of red apples is given by the equation y = 2x

where x = is number of pounds of red apples

Therefore clearly it can seen from the equation that the slope of this equation will be more steeper than the slope of the cost of the cost the green apples.

Now since the slope is more steep, therefore we can conclude that the red apples will cost more than the green apples for per pound of apples.

Thus, red apples will cost more per pound than green apples.

Answer:

Step-by-step explanation:

1 gallon = 4 quarts

5 gallons 2 quarts 1 pint = 4 gallons 6 quarts 1 pint

(5 gallons 2 quarts 1 pint) - (1 gallon 3 quarts)

= (4 gallons 6 quarts 1 pint) - (1 gallon 3 quarts)

= 3 gallons 3 quarts 1 pint

Answer:

59

Step-by-step explanation:

a + b + C = -1

x + y + z = -8

We want 5a so multiply the first equation by 5

5(a + b + c) = -1*5

5a+5b+5c = -5

We want -8x so multiply the second equation by -8

-8(x + y + z) = -8*-8

-8x-8y-8x = 64

Add these equations together

5a+5b+5c = -5

-8x-8y-8x = 64

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

-8x -8y-8x+5a+5b+5c = 59

Rearrange the order

-8z -8x + 5a + 5c - 8y + 5b = 59

Answer:

59

Step-by-step explanation:

The first step here is to rewrite -8z -8x + 5a + 5c - 8y + 5b as

                                                    -8x - 8y - 8z + 5a + 5b + 5c.

This is the same as -8(x + y + z) + 5(a + b + c).

Subbing -8 for (x + y + z) and -1 for (a + b + c), we get -8(-8) - 5, or 59.

Use the substitution method

-x+4x  when x=-2

-(-2)+4(-2)  Positive number * ( multiplying)Negative number=Negative number

2-8

=-6

Answer is -6

Answer: 5.099

Step-by-step explanation:

technically, 5.099 is 5.10

10 is bigger than 13 so

5.13 > 5.10

Answer:

2x(x + 3)(2x - 1)

Step-by-step explanation:

Given

4x³ + 10x² - 6x ( factor out 2x from each term )

= 2x(2x² + 5x - 3)

To factorise the quadratic

Consider the factors of the product of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 2 × - 3 = - 6 and sum = + 5

The factors are + 6 and - 1

Use these factors to split the x- term

2x² + 6x - x - 3 ( factor the first/second and third/fourth terms )

2x(x + 3) - 1(x + 3) ← factor out (x + 3) from each term

(x + 3)(2x - 1), hence

2x² + 5x - 3 = (x + 3)(2x - 1)

Hence

4x³ + 10x² - 6x = 2x(x + 3)(2x - 1)

Answer:

B

Step-by-step explanation:

The graph of the given equation is the line that passes through (0,-1) and (3/2,0) and whose slope is m = 2/3 and this can be determined by using the slope-intercept form of the line.

Given :

Equation -   [tex](y -1) = \dfrac{2}{3}(x-3)[/tex]

The following steps can be used to draw the graph of the given equation:

Step 1 - Write the given equation.

[tex](y -1) = \dfrac{2}{3}(x-3)[/tex]

Step 2 - Simplify the above equation.

[tex]y = \dfrac{2}{3}x - 2 + 1[/tex]

[tex]y = \dfrac{2}{3}x - 1[/tex]

Step 3 - Draw the graph of (y = x).

Step 4 - Find the y-intercept and the slope of the above equation.

c = -1

[tex]m = \dfrac{2}{3}[/tex]

Step 5 - So, the graph of the given equation is the line that passes through (0,-1) and (3/2,0) and whose slope is m = 2/3.

For more information, refer to the link given below:

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The graph of the equation is a line that passes through the origin (0, 0) and has a slope of 2/3.

The given equation is y - 1 = ⅓(x - 3). To graph this equation, we can start by rearranging it in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.

First, let's isolate y by adding 1 to both sides of the equation:

y = ⅓(x - 3) + 1

Now, simplify the expression on the right side:

y = ⅓x - 1 + 1

y = ⅓x

So, the equation y - 1 = ⅓(x - 3) represents a line with a slope of ⅓ and a y-intercept of 0. To graph this line, we can plot the y-intercept at (0, 0) and use the slope to draw the line.

The graph of this equation is a line that passes through the origin (0, 0) and has a slope of ⅓. Any point on this line can be represented as (x, ⅓x).

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Answer:

You can not break that down any further if x does not equal anything and the equation is not equal to anything.

Step-by-step explanation:

Answer: True

Step-by-step explanation: 20% can also be written as 0.2 and if you know the number then you would multiply it by 0.2, then if you needed to add 11 that is exactly how you would write that equation

Answer:

x=1.04 i bet u thats right no joke hope i helped ;)

Step-by-step explanation:

Find the GCD (or HCF) of numerator and denominator

GCD of 18 and 20 is 2

Divide both the numerator and denominator by the GCD

18 ÷ 2

-----------

20 ÷ 2

Reduced fraction:

9

----

10

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\text{What's }\huge\dfrac{18}{20}\huge\text{ simplified?}[/tex]

[tex]\huge\text{Both terms have the GCF}[/tex] [tex]\huge\text{(Greatest Common Factor) of 2}[/tex]

[tex]\huge\text{So, divide both numbers by 2.}[/tex]

[tex]\huge\dfrac{18\div2}{20\div2}[/tex]

[tex]\huge\text{18}\huge\div\huge\text{2 = 9}[/tex]

[tex]\huge\text{9 is the numerator (top \#)}[/tex]

[tex]\huge\text{20}\huge\div\huge\text{2 = 10}[/tex] [tex]\huge\text{10 is the denominator (bottom \#)}[/tex]

[tex]\boxed{\boxed{\huge\text{Answer: }\huge\dfrac{9}{10}}}\huge\checkmark[/tex]

[tex]\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\frak{LoveYourselfFirst:)}[/tex]

Answer:

[tex]\large\boxed{x=\dfrac{5}{4}\ \vee\ x=-\dfrac{13}{6}}[/tex]

Step-by-step explanation:

[tex]|5x+4|=|x+9|\iff5x+4=x+9\ or\ 5x+4=-(x+9)\\\\5x+4=x+9\qquad\text{subtract 4 from both sides}\\5x=x+5\qquad\text{subtract x from both sides}\\4x=5\qquad\text{divide both sides by 4}\\x=\dfrac{5}{4}\\\\5x+4=-(x+9)\\5x+4=-x-9\qquad\text{subtract 4 from both sides}\\5x=-x-13\qquad\text{add x to both sides}\\6x=-13\qquad\text{divide both sides by 6}\\x=-\dfrac{13}{6}[/tex]

Answer:

slope: 4

Step-by-step explanation:

y = 4x-2 is in the form y = mx +b where m is the slope and b is the y intercept

4 is the slope and -2 is the y intercept

Answer:

Step-by-step explanation:

The slope-intercept form of an equation of a line:

[tex]y=mx+b[/tex]

m - slope

b - y-intercept

We have [tex]y=4x-2[/tex].

Therefore

the slope [tex]m=4[/tex]

the y-intercept [tex]b=-2[/tex]

Answer:

90$

Step-by-step explanation:

45$

45*3=135

But your return was 3 times the price, so subtract a 45.

135-45=90$

Answer: $90

Step-by-step explanation:

Given : The cost of one stock = $45

And the value of that stock after 15 years is 3 times the paid price.

i.e. The value of that stock after 15 years = [tex]3\times45=\$135[/tex]

Then, the return on owning this stock = [tex]\text{Value after 15 years -Paid price}[/tex]

[tex]=\$135-\$45=\$90[/tex]

Therefore, the return on owning this stock = $90

Answer: second option.

Step-by-step explanation:

We know that:

[tex]\sqrt[n]{a^n}=a[/tex]

[tex](a^m)(a^n)=a^{(m+n)[/tex]

Then we can simplify the radicals:

[tex]2\sqrt{8x^3}(3\sqrt{10x^4}-x\sqrt{5x^2})=(2\sqrt{2^2*2*x^2*x})(3\sqrt{10x^4}-x\sqrt{5x^2})=\\\\=2*2*x\sqrt{2x}=3x^2\sqrt{10}-x*x\sqrt{5}\\\\=4x\sqrt{2x}(3x^2\sqrt{10}-x^2\sqrt{5})[/tex]

Since:

[tex](a\sqrt[n]{x})*(b\sqrt[n]{y})=ab\sqrt[n]{xy}[/tex]

We can apply Distributive property:

[tex]4x\sqrt{2x}(3x^2\sqrt{10}-x^2\sqrt{5})\\\\12x^3\sqrt{20x}-4x^3\sqrt{10x}[/tex]

Simplifying:

[tex]12x^3*2\sqrt{5x}-4x^3\sqrt{10x}\\\\24x^3\sqrt{5x}-4x^3\sqrt{10x}[/tex]

Answer:

B

Step-by-step explanation:

edg2021

Answer:

Boxplot A

Step-by-step explanation:

Answer: Option 'A' is correct.

Step-by-step explanation:

Since we have given that

58, 50, 48, 46, 44, 42, 40, 38, 36, 34, 32, 30, 28, 26, 24, 22, 14.

We will write in ascending order:

14 ,22 ,24 ,26 ,28,30 ,32 ,34, 36 ,38, 40, 42 ,44 ,46 ,48,50,58.

Since there are 17 terms in the above data.

So, Median would be 36.

As box plot shows the middle point of the data i.e. median.

In box plot A it shows the correct median at the middle i.e. 50% of the scores.

Hence, option 'A' is correct.

Answer:

C. y-10=2(x-1)

Step-by-step explanation:

We have two points on the line, we can find the slope

m = (y2-y1)/(x2-x1)

   = (10-2)/(1--3)

   = 8/(1+3)

   =8/4

  =2

The slope is 2

We can use point slope form using the point (1,10)

y-y1 = m(x-x1)

y-10 = 2(x-1)

Answer:

Step-by-step explanation:

The point-slope form of an equation of a line:

[tex]y-y_1=m(x-x_1)[/tex]

m - slope

(x₁, y₁) - point

The formula of a slope:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

We have the points (-3, 2) and (1, 10). Substitute:

[tex]m=\dfrac{10-2}{1-(-3)}=\dfrac{8}{4}=2[/tex]

Using the point (-3, 2):

[tex]y-2=2(x-(-3))\\\\y-2=2(x+3)[/tex]

Using the point (1, 10):

[tex]y-10=2(x-1)[/tex]

Answer:

C .The initial amount of money placed in the savings account

Step-by-step explanation:

f(x) = 3,267(1 + 0.02)^x

This is in the form

y = a b^x

where a is the initial amount

b is the growth rate

x is the time

3267 is the initial amount

1.02 is the growth rate, so it grows by .02 or 2 percent

and x is the time

The function f(x) = 3,267(1 + 0.02)* represents the amount of money in a savings account where x represents time in years. What does the 3,267 represent?

Answer:

C .The initial amount of money placed in the savings account

Answer:

4x^2 + 8x - 12 = 0.

Step-by-step explanation:

We first write it in factor form.

4(x - 1)(x + 3) = 0

4(x^2 + 2x - 3) = 0

4x^2 + 8x - 12 = 0 (answer).

Answer:

4x^2 + 8x - 12 = 0

Step-by-step explanation:

A quadratic equation with roots a and b has the equation (x - a)(x - b) = 0.

You roots are 1 and -3.

The equation is

(x - 1)(x - (3)) = 0

(x - 1)(x + 3) = 0

We can multiply it out.

x^2 + 3x - x - 3 = 0

x^2 + 2x - 3 = 0

Since we need the leading coefficient to be 4, we multiply both sides by 4.

4x^2 + 8x - 12 = 0

Answer:

look at the picture attached

Answer:

It's the third choice.

Step-by-step explanation:

M < NKM and m < MKL both equal  61 degrees

so KM is a bisector of < NKL.

Answer:

C:ray MK is an angle bisector of angle NKL

Step-by-step explanation:

We have to find the true statement about the diagram

[tex]\angle JKN=58^{\circ}[/tex]

[tex]\angle NKM=61^{\circ}[/tex]

[tex]\angle MKL=61^{\circ}[/tex]

[tex]\angle NKM=\angle MKL=61^{\circ}[/tex]

When a ray is a bisector of any angle then the angles are equal which are made by bisection of the angle.

By using this definition

The ray MK is a bisector of angle NKL because angle NKM and MKL are equal.

Answer:C

Answer:

A triangle is equilateral if all three angles are same. but here two angles are 64° but third angle is 52°. so, Yin is incorrect.

Step-by-step explanation:

x = 19,

Putting value of x to find m∠ABC and m∠ACB

m∠ABC = (4x – 12)°

m∠ABC = (4(19) – 12)°

m∠ABC = (76 – 12)°

m∠ABC = 64°

m∠ACB = (2(19) + 26)°

m∠ACB = (38 + 26)°

m∠ACB = 64°

now we know sum of angles of triangle is 180°. We can find the measure of third angle.

180 = 64+64 +x

x= 180 - 64 - 64

x = 52°

A triangle is equilateral if all three angles are same. but here two angles are 64° but third angle is 52°. so, Yin is incorrect.

Sample Response: No, Yin is not correct. If

x = 19, the measure of angle ABC = 4(19) – 12 = 64. Therefore, the two base angles measure 64°. An equilateral triangle is equiangular, so each angle would have to measure 60° because there are 180° in a triangle.

What did you include in your response? Check all that apply.

Yin is not correct.

The measure of the congruent base angles is 64°.

The measures of the angles in an equilateral triangle are 60°.

Answer:

Step-by-step explanation:

[tex]4x^2+3x=24-x\qquad\text{subtract 24 from both sides}\\\\4x^2+3x-24=-x\qquad\text{add}\ x\ \text{to both sides}\\\\4x^2+4x-24=0\qquad\text{divide both sides by 4}\\\\x^2+x-6=0\\\\x^2+3x-2x-6=0\\\\x(x+3)-2(x+3)=0\\\\(x+3)(x-2)=0\iff x+3=0\ \vee\ x-2=0\\\\x+3=0\qquad\text{subtract 3 from both sides}\\x=-3\\\\x-2=0\qquad\text{add 2 to both sides}\\x=2[/tex]

The given equation, 4·x² + 3·x = 24 - x, can be simplified and factorized

to give the solution as; -3, 2

The solution to the given equation, 4·x² + 3·x = 24 - x, is the point of

intersection of the parabola, 4·x² + 3·x, and the line, 24 - x

The solution is therefore, found as follows;

4·x² + 3·x = 24 - x

4·x² + 3·x - (24 - x) = 0

4·x² + 4·x - 24 = 0

Dividing by 4, gives;

4·(x² + x - 6) = 0

x² + x - 6 = 0 ÷ 4 = 0

Factorizing, the above quadratic equation, we have;

(x + 3) × (x - 2) = 0

The solution of the equation is therefore;

Learn more about factorizing quadratic equations here:

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Answer:

B, 14.6 units.

Step-by-step explanation:

The answer is be because:

the diameter = radius times 2

radius= 7.3

diameter=7.3*2

              =14.6

Therefore the answer is, B

Answer: B. 14.6 units

Step-by-step explanation: The diameter of a circle is two times the length of the radius. So multiply the radius by 2.

7.3 x 2 = 14.6

The diameter of the circle is 14.6 units.

The math trick described allows you to figure out which hand a friend is holding a penny in by having them multiply the value of the coins in their hands by specific numbers, adding the results, and determining whether the total is even or odd.

The subject at hand pertains to a mathematical trick used to determine in which writing a friend is holding a penny. To execute the scheme, follow the procedure:

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Answer:

421

Step-by-step explanation:

Margin of error = E = 0.04

Confidence Level = 90%

z value associated with this confidence level = z = 1.645

Previous estimate of population proportion = p = 0.54

q = 1 - p = 1 - 0.54 = 0.46

The formula of Margin of Error for population proportion is:

[tex]E=z\sqrt{\frac{pq}{n}}[/tex]

Here, n is the sample size.

Re-arranging the equation for n and using the values we get:

[tex]n=(\frac{z}{E})^{2} \times pq\\\\ n = (\frac{1.645}{0.04})^{2} \times 0.54 \times 0.46\\\\ n = 421[/tex]

Thus the minimum sample size required to estimate the proportion of adults who have high speed internet access is 421

Answer:

-4x^2-6x+6

Step-by-step explanation:

We are asked to subtract g from f.

So the problem is:

[8x^2-2x+3]-[12x^2+4x-3]

So I'm going to distribute and write without [].

8x^2-2x+3-12x^2-4x+3

Now I'm going to pair up any like terms:

8x^2-12x^2-2x-4x+3+3

Simplifying:

-4x^2-6x+6

Answer:  The correct option is

(C) [tex]h(x)=-4x^2-6x+6.[/tex]

Step-by-step explanation:  We are given the following two functions :

[tex]f(x)=8x^2-2x+3,~~~~~g(x)=12x^2+4x-3.[/tex]

We are to find the value of h(x) if h(x) = f(x) - g(x).

To find the value of h(x), we must subtract the expression of g(x) from the expression of f(x).

The value of h(x) can be calculated as follows :

[tex]h(x)\\\\=f(x)-g(x)\\\\=(8x^2-2x+3)-(12x^2+4x-3)\\\\=8x^2-2x+3-12x^2-4x+3\\\\=-4x^2-6x+6.[/tex]

Thus, the required value of h(x) is [tex]-4x^2-6x+6.[/tex]

Option (C) is CORRECT.

Answer: C

Step-by-step explanation:

y2-y1/x2-x1

-9+7/5-6 = 2