Help! I don’t know if this is correct

The simplified expression for the given algebraic expression -2(3x – 2) -5(7 – x) will be ( -x - 31)

As per the question statement, we are supposed to find the simplified expression for the given algebraic expression -2(3x – 2) -5(7 – x).

For solving the above expression, we should be having good knowledge of all mathematical operators and BODMAS.

Let y =  -2(3x – 2) -5(7 – x)

y = -6x + 2*2 - 5*7 + 5x

y = -6x + 4 - 35 +5x

y = -x - 31

Therefore, the simplified expression for the given algebraic expression -2(3x – 2) -5(7 – x) will be y = ( -x - 31)

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The tree is 79 feet tall if the ground is 79 feet from the tree and the angle of elevation is 45°.

Angle of elevation:

The angle of elevation is an angle that is formed between the horizontal line and the line of sight.

Therefore, the line of sight is upward from the horizontal line, then the angle formed is an angle of elevation.

Given,

The angle of elevation to a nearby tree from a point on the ground is measured to be 45 degrees.

Here we need to find how tall is the tree if the point on the ground is 79 feet from the tree and we have also need to round the  answer to the nearest hundredth of a foot.

Here we know that

The angle of elevation = 45°

Distance of the point from the tree = 79 feet

Suppose h is the height of the tree.

Then the value of h is calculated as,

=> h / 79 = tan 45°

We know that, the value of tan 45° = 1,

So,

=> h/79 = 1

Then  the value of h is,

=> h = 79

Thus, the height of the tree is 79 feet.

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Answer: You would pay $7.97 for the bagels.

Step-by-step explanation:

(Price per Dozen * Amount) - Coupon = Price of Bagels

(5.98 * 1.5) - 1 = Price of Bagels

8.97 - 1 = Price of Bagels

Price of Bagels = $7.97

On multiplying by [3], the slope becomes 3 times the original slope and

y - intercept becomes 3 times of the original value.

The general equation of a straight line is -

[y] = [m]x + [c]

where -

[m] is slope of line which tells the unit rate of change of [y] with respect to [x].

[c] is the y - intercept i.e. the point where the graph cuts the [y] axis.

The equation of a straight line can be also written as -

Ax + By + C = 0

By = - Ax - C

y = (- A/B)x - (C/A)

We have the following problem -

f(x) = ax + b, where [a] and [b] are nonzero real numbers. Now, the function f(x) is multiplied by 3.

The given straight line is -

y = f(x) = ax + b

After multiplied by [3], we get -

y' = 3f(x) = 3(ax + b) = (3a)x + (3b)

Therefore, on multiplying by [3], the slope becomes 3 times the original slope and y - intercept becomes 3 times of the original value.

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[Complete question - Given f(x) = ax + b, where a and b are nonzero real numbers, which of the following describes the differences between the graph of f and the graph of the output of f multiplied by 3 ]

The required absolute value linear inequality is 15 ≤ t ≤ 20.

What is absolute value linear inequality?

A variable enclosed by the absolute value sign of an inequality is known as an absolute value inequality.

Given highest temperature as 20°C and lowest temperature as 15°C

Given variable is t.

From the first condition we get t ≤ 20  ...........(1)

From  the second condition we get 15 ≤ t  .....(2)

From the inequalities (1) and (2), we get

15 ≤ t ≤ 20

Therefore, the required absolute value linear inequality is 15 ≤ t ≤ 20.

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Answer:

Proved below.

Step-by-step explanation:

Parallel lines and angles:

     Given: p // q and ∠1≅ ∠2

Proof:

        p //q, l is transversal,

            ∠3 ≅ ∠1   -----(I)    {Corresponding angles are congruent}

          ∠1 ≅ ∠2   ---------(II)    {Given}

From (II) & (I),

        ∠3 ≅ ∠2

∠3 and ∠2 are alternate interior angles. Alternate interior angles are congruent only if the lines are parallel.

⇒ l // m

That indicates that in order to make a solution that is 60% acid, you will need to add a total of 300 milliliters of pure acid into the mixture.

This is further explained below.

In general, pure acid refers to an acid concentration of 100%. It is feasible to formulate the following equation if you assume that X represents the volume addition of the pure acid:

[tex]Va=100 \%X + 600 * 40 \%[/tex]

[tex]Va= (600+X)60 \% (M_1V_1=M_1 V_2)[/tex]

100X + 24000 = 36000 + 60x

X = 300.

In conclusion, That implies in order to generate a solution that is 60% acid, you will need to add 300 milliliters of pure acid.

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Answer: This is the graph

ALL THE SHAPES HERE ARE RECTANGLES AND THE AREA OF A RECTANGLE IS =L×B

TO GET THE AREA OF THE SHADED PART WE SAY THE AREA OF THE OUTSIDE SHAPE SUBTRACT THE AREA OF THE INNER SHAPE.

LET US FIND THE AREA OF THE OUTSIDE RECTANGLE FIRST.

[tex]a1 = (x + 5)(x - 1) \\ = {x}^{2} - x + 5x - 5 \\ a = {x}^{2} +4 x - 5[/tex]

NOW LET US FIND THE AREA OF THE INNER RECTANGLE.

[tex]a2 = (x + 1)(x - 4) \\ a = {x}^{2} - 4x + x - 4 \\ \\ a = {x }^{2} - 3x - 4[/tex]

the area of the shaded part is given by

[tex]a1 - a2 = ( {x}^{2} +4 x - 5) - ( {x}^{2} - 3x - 4) \\ = {x}^{2} + 4x - 5 - {x }^{2} + 3x + 4 \\ = {x}^{2} - {x}^{2} + 4x + 3x - 5 + 4 \\ areashaded = 7x - 1[/tex]

a. The graph shows a positive correlation.

b. Using the line of best fit, his predicted score in his second paper could have been between 60 - 65.

A positive correlation is a type of correlation whereby two variables move in the same direction. That is, as one increases, the other increases also.

In a scatter plot, a positive correlation exist when both variables appear to move towards the same direction as the line of best fit slopes upwards from left to your right.

a. The scatter plot shows an upward trend on the line of best fit, therefore, the type of correlation shown by the graph is: positive correlation.

b. Using the line of best fit to make prediction, if he got 50 in his paper 1, then the score of the student in his paper 2 could have been between 60 and 65.

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Answer: 0.93

There are 9 tenths

Step-by-step explanation:

The measure of the top, vertex angle of an isosceles triangle is option c 100 degrees

Given,

The base angle of an isosceles triangle = 40 degrees

We have to find the top, vertex angle:

Isosceles triangle:

Therefore, an isosceles triangle has two equal sides as well as two equal angles. The Greek words iso (same) and skelos are the source of the name (leg). An equilateral triangle is one in which all of its sides are equal, whereas a scalene triangle is one in which none of its sides are equal.

Here,

We know that total interior angle of a triangle is 180°

In an isosceles triangle base angles will be equal.

Here, base angle is 40 degrees.

Now, the top, vertex angle = total angle - base angle × 2

= 180 - 40 × 2

= 180 - 80

= 100

That is, the top, vertex angle of an isosceles triangle is 100°

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The x value will be 109°. The straight line formed a 180° angle. Solving the equation yields the angle.

Supplementary angles are two angels whose sum is 180°. When a straight line intersects a line, two angles form on each of the sides of the considered straight line.

Those two-two angles are supplementary angles in two pairs. That is, if two supplementary angles are adjacent to each other, their exterior sides form a straight line.

The straight line formed a 180° angle. The resulting equation is as follows:

⇒x+42°+29°=180°

⇒x=109°

Hence, the value of the x will be 109°

The complete question is:

AB is a straight line.

Work out the size of angle x.

Not drawn accurately

42°

Х

29°

А

B

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1 small pizza and 4 large pizza feeds people according to the system of equations.

Let the number of small pizza be x and the number of large pizza be y.

So, we get the two equations as:

3 x + 4 y = 19 ...(1)

5 x + 5 y = 25 ...(2)

Taking 5 common from equation 2, we get that:

x + y = 5

x = 5 - y

Put it in equation 1, we get that:

15 - 3 y + 4 y = 19

15 + y = 19

y = 4

x = 5 - 4 = 1

Therefore, we get that, 1 small pizza and 4 large pizza feeds people according to the system of equations.

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The zeroes of the equation f(x) is 3x² + 18x + 32 is x =  -18 -7.75/ 6 and x = -18 + 7.75/ 6

Algebraic expressions called polynomials include coefficients and variables. Indeterminates are another name for variables. For polynomial expressions, we can do mathematical operations like addition, subtraction, multiplication, and positive integer exponents but not division by variables.

Given f(x) = 3x² + 18x + 32

3x^2 + 18x + 32 = 0

Here, a = 3

b = 18

c = 32

-b ±[tex]\frac{\sqrt{b^2-4ac} }{2a}[/tex]

-18 ± [tex]\frac{\sqrt{18^2-4(3)(32)} }{2(3)}[/tex]

-18 ± [tex]\frac{\sqrt{324-84} }{6}[/tex]

-18 ± [tex]\frac{\sqrt{-60} }{6}[/tex]

-18 ± [tex]\frac{-7.75}{6}[/tex]

X = -18 (-7.75)/ 6 and x = -18 – (-7.75)/ 6

X = -18 -7.75/ 6 and x = -18 + 7.75/ 6

Therefore, the zeroes of the polynomial are X = -18 -7.75/ 6 and x = -18 + 7.75/ 6

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Answer:

Step-by-step explanation:

Area = L times w ( length times width.)

Your lengthyot Length is 4 units and width is 4. so what is 4 times 4?

your right, its 16. Answer A is correct.

The domain and range of the function f(x) = 4x - 6 in order from least to greatest include the following:

A range can be defined as the set of all real numbers that connects with the elements of a domain. This ultimately implies that, a range refers to the set of all possible output numerical values, which are shown on the y-axis of a graph.

A domain can be defined as the set of all real numbers for which a particular function is defined. This ultimately implies that, a domain is the set of all possible input numerical values to a function and the domain of a graph comprises all the input numerical values which are shown on the x-axis.

In order from least to greatest, the range and domain of the given function f(x) = 4x - 6 are as follows:

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Answer: true

Step-by-step explanation:

The domain of any function represents the set of values of x for which the function is true.

The function shown in the graph starts at x=3 and continues towards +∞

The domain of the function is all values of x greater than or equal to 3.

Answer:

Cost per egg = 8.4/12 = 0.7

Cost per hundred egg =Rs70

Let selecting price per hundred be Rs.y

⇒ 70/y-70 ×100 = 15

⇒ 10y−700 = 105

IF AB=3x, BC=x+5 and AC=24 then the midpoint of AC is point B.

Midpoint, as the word suggests, means the point which lies in the middle of something. Midpoint of a line segment means a point which lies in the mid of the given line segment.

WE have given that AB=3x, BC=x+5 and AC=24. Since B is the midpoint, then we have:

AB = BC = AC/2

Now Substitute and solve for x:

AB = BC

x + 5 = 3x

x + -3x = -5

2x = 5

x = 5/2

AB = 3(5/2) = 15/2

BC = x + 5 = 5/2 + 5 = 15/2

Hence, the midpoint of AC is point B.

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The  statements that would prove the lines are parallel are;

∠GHI ≅ ∠KJH

∠MJH + ∠NHJ = 180°

∠KJH + ∠IHJ = 180°

In congruency of angles formed in this type of scenario, we will make use of the following rules;

Using the above congruency rules and applying them to our question, we can say that for lines HN and KM to be parallel to each other, then;

∠GHI ≅ ∠KJH because they are corresponding angles

∠MJH + ∠NHJ = 180° because they are supplementary angles

∠KJH + ∠IHJ = 180° because they are supplementary angles

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Answer:

[tex]7 * x^2[/tex]

Answer: x=8

Step-by-step explanation:

2x-3+x+5

2x-3+3=x+5+3 (Add 3 to both sides)

-2x=x+8

_____________

2x=x+8

2x-x=x+8-x (Subtract x from both sides)

_____________

Combine like terms

_____________

2x-x=x+8-x

1x=x+8-x

Multiply by 1

1x=x+8-x

x=x+8-x

_____________

Combine like terms

x=x+8-x

[x=8]

Answer:

1500

Step-by-step explanation:

600 divided by 4 to see how much hotdogs are sold EACH home football game. This gives you 150 each game so you multiple it by ten in order to get the total for ten home games

Check the picture below.

[tex]\stackrel{\measuredangle U}{(3x-4)}~~ + ~~\stackrel{\measuredangle V}{(x+20)}~~ + ~~\stackrel{\measuredangle W}{(6x+6)}~~ = ~~180 \\\\\\ 10x+22=180\implies 10x=158\implies x=\cfrac{158}{10}\implies {\Large \begin{array}{llll} x=\cfrac{79}{5} \end{array}}[/tex]

a) By definition of standard form, a light-year is equal to 5.880 × 10¹² miles.

b) By simple rule of three, a magnitude of 4.25 light-year is equivalent to a magnitude of 2.499 × 10¹³ miles.

In this problem we need to convert a magnitude in miles to an equivalent magnitude in light-years and another magnitud in light-years to an equivalent magnitude in miles. Standard form is a notation used to represent both large and small number with no significant loss of precision. This form is described by the following form:

a.b × 10ⁿ

Where:

a) A light-year is equal to 5.880 × 10¹² miles.

b) The equivalent magnitude in miles is found by the following simple rule of three:

x = 4.25 ly × (5.880 × 10¹² mi / ly)

x = 2.499 × 10¹³ mi

A magnitude of 4.25 light-year is equivalent to a magnitude of 2.499 × 10¹³ miles.

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The volume of sphere in terms of  is 288 cubic inches, if the sphere has a radius of 6 inches.

What is the volume of sphere?

In mathematics, the volume of the sphere defines the capacity of a sphere. It is measured in the cubic unit. Basically, it tells the amount of the air it can hold inside the sphere.

According to the question, the given data state that the sphere has a radius of 6 inches

Using standard formula for volume of sphere is,

Volume of the sphere = (4/3)πr³    

where, r - radius of sphere and it is 6 inches

Therefore, volume of sphere = (4/3)π(6)³ = (4/3)π(216) = 288 Cubic inches

Hence, the volume of sphere in terms of  is 288 cubic inches, if the sphere has a radius of 6 inches.

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