Hey can someone please help me out and explain the problem? Look below. Thank you! I’ll give brainly

1.  Elijah is the smallest sibling among his brother who is 4 years older than her and Bryan is the eldest sibling who is twice as James, what is his age of James if the sum of their ages is 80 years?

2. If the equation in step B had been 2(x + 4) = 80,  the changed statement would be Bryan is 80 years old.

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Here we are converting a numerical expression into a statement.

Given,

Step A

Let x = Elijah’s age.

x + 4 = James’s age

2(x +4) = Bryan’s age.

Step B

x + x + 4 + 2(x +4) = 80.

Step C 4x + 12 = 80

X = 17

Step D James is 21.

The verbal problem to the algebra test can be stated as

Elijah is the smallest sibling among his brother who is 4 years older than her and Bryan is the eldest sibling who is twice as James, what is the age of James if the sum of their ages is 80 years?

If the equation in step B had been 2(x + 4) = 80,  the changed statement would be Bryan is 80 years old.

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Answer:

Domain: [0,∞), {x|x ≥ 0}

Range: [0,∞), {y|y ≥ 0}

Step-by-step explanation:

1. Find where the FUNCTION is DEFINED.

A function is a set of ordered pairs where each first element is paired with one, and only one, second element. No element in either pair is without a partner.

2. Find the DOMAIN: The set of all x-values that a function passes through. Also, it is the left coordinate in a coordinate pair.

3. The RANGE: the set of all y-values that a function passes through. Also, it is the right coordinate in a coordinate pair.

The possible solutions are 8 hours and 9 hours.

The number of hours for lifeguarding is 8 hours.

The number of hours for clearing tables is 9 hours.

It shows a relationship between two numbers or two expressions.

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal = ≤

Greater than and equal = ≥

We have,

Two summer jobs:

Lifeguarding.

x = number of hours

= $19 per hour

Cleaning tables.

y = number of hours

=$14 per hour

Total hours in a week = 17 hours

Minimum earning = $280

The inequality represents the above situation.

x + y ≥ 17

19x + 14y ≥ 280

Solving for x and y.

x + y = 17 _____(1)

x = 17 - y

19x + 14y = 280 ______(2)

Putting (1) in (2) we get,

19(17 - y) + 14y = 280

323 - 19y + 14y = 280

323 - 5y = 280

323 - 280 = 5y

43 = 5y

y = 43/5

y = 8.6

y = 9

Now,

x = 17 - y

x = 17 - 8.6

x = 8.4

x = 8

Thus,

The possible solutions are 8 hours and 9 hours.

The number of hours for lifeguarding is 8 hours.

The number of hours for clearing tables is 9 hours.

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Check the picture below.

Answer:

Step-by-step explanation:

C

The expression will be i.e., 2(8 + 7).

The correct option is (D)

Given,

In the question:

Joan has a vegetable garden in her backyard that measures 8 feet 7 feet.

To find the which expression would not calculate the garden's perimeter?

Now, According to the question;

Based on the given conditions:

Formulate:

Measurement of garden is :

Length and breadth is 7 ft. and 8 ft.

Calculate:

2 x (7 + 8)

= 30

Hence, The expression will be i.e., 2(8 + 7).

The correct option is (D)

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Answer: I don't know

Step-by-step explanation:

I have no idea

Answer:20

Step-by-step explanation:

According to the scale factor, When the scale is changed to 20 feet to 1 unit, then the drawing would be exactly the same shape, here only each side would have half the original drawing units.

Scale factor:

The ratio between the scale of a given original object and a new object, which is its representation but of a different size (bigger or smaller) is known as scale factor.

Given,

This is a scale drawing of an apartment. The actual apartment has a perimeter of 160 ft.

Here we need to find the reason for the scale drawing of the apartment using the scale 20 feet to 1 unit from the apartment

Here we know that the actual apartment has a perimeter of 160 ft.

And we have to draw another scale drawing of the apartment using the scale 20 feet to 1 unit from the apartment to the drawing.

So, as per the given details, the perimeter lies along the edges of squares and we count 16 sides of squares as we work around the perimeter, this means that each square is calculated as,

=> 160 / 16 = 10 feet on a side.

Therefore, 10 feet in real life plots to 1 unit on the drawing

Therefore, if we change the scale to 20 feet to  1 unit , then the drawing would be exactly the same shape, only each side would have half the original drawing units.

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The correct number of servings would be = 12/25

A cooking class is defined as the class that is made up of students that are being thought how to prepare and serve different types of food.

The total amount of quarts of food made by the students = 4½.

The number of servings to friends = ⅘

The quantity of quarts in each serving = ⅗ quarts

Total number of quarts served = ⅘ × ⅗= 12/25

The correct number of servings = 12/25

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Answer:

-3≥11.5

Step-by-step explanation:

-3≥1/2+11

-3≥11.5

The equation of line passes through the point (0, 7) will be;

⇒ y  = 1/2x + 7

What is Equation of line?

The equation of line in point-slope form passing through the points

(x₁ , y₁) and (x₂, y₂) with slope m is defined as;

⇒ y - y₁ = m (x - x₁)

Where, m = (y₂ - y₁) / (x₂ - x₁)

Given that;

The point on the line are (0, 7).

And, The perpendicular line is,

⇒ y = -1/2x + 5

Now,

Since, The equation of line passes through the point (0, 7).

So, We need to find the slope of the line.

Since, The product of slope of the perpendicular lines is - 1.

Hence, Slope of the perpendicular line is,

y = -1/2x + 5

m₁ = dy/dx = - 1/2

m₁ = - 1/2

So, The slope of the line,

m₂ = - (- 1/2)

    = 1 / 2

Thus, The equation of line with slope 1/2 is,

⇒ y - 7 = 1/2 (x - 0)

⇒ y - 7 = 1/2 x

⇒ y  = 1/2x + 7

Therefore, The equation of line passes through the point (0, 7) will be;

⇒ y  = 1/2x + 7

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Answer:

"Multiply to remove the fraction then set it equal to 0 and solve."

Exact form

x = - 39/2

Decimal Form:

x = -19.5

Mixed Number Form:
x = - 19 1/2

Hope this helped...!

Using the vertex of the quadratic equation, it is found that the profit will be maximized when each ticket price is sold for $2.

A quadratic equation is the second-order degree algebraic expression in a variable. the standard form of this expression is  ax² + bx + c = 0 where a. b are coefficients and x is the variable and c is a constant.

Considering the coefficient a, we have;

If a < 0, the vertex is a maximum point.

If a > 0, the vertex is a minimum point.

In this question, the function is modeled as follows, considering x as the price divided by $2.

P(x) = -15x² + 60x + 30.

The coefficients are a = -15 < 0, b = 60, c = 30, therefore the x-value of the vertex is given by:

V = -b/2a

V = -60/2(-15)

V = -60/-30

V = 2

Hence, the profit will be maximized when each ticket price is sold for $2.

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Answer:

1. y ⇒ ∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain:  (-∞, ∞); Range:  [0, ∞)

2. y ⇒ -∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain:  (-∞, ∞); Range:  (-∞, ∞)

3. y ⇒ -∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain:  (-∞, ∞); Range:  (-∞, ∞)

4. y ⇒ ∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞; Domain:  (-∞, ∞); Range:  [0, ∞)

Step-by-step explanation:

Rule for end behavior of polynomials:

(a) Positive leading coefficient, even degree:  y ⇒ ∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞

(b) Negative leading coefficient, even degree: y ⇒ -∞ as x ⇒ ∞ AND y ⇒ -∞ as x ⇒ -∞  

(c) Positive leading coefficient, odd degree:  y ⇒ ∞ as x ⇒ ∞ AND y ⇒ -∞ as x ⇒ -∞

(d) Negative leading coefficient, odd degree:  y ⇒ -∞ as x ⇒ ∞ AND y ⇒ ∞ as x ⇒ -∞

Domain and range for a polynomial function with an odd degree will always be all real numbers, whether or not there's a constant or not.

Domain will always be all real numbers for a polynomial function with an even, whether or not there's a constant.

For a polynomial function with an even degree, the range will extend from the y-coordinate of the vertex to ∞, if the leading coefficient is positive

For a polynomial function with an even degree, the range will extend from -∞ to the y-coordinate of the vertex if the leading coefficient is negative.

Answer:

{x,y}={25/7,41/7}

Step-by-step explanation:

The following equation expressed in scientific notation would be as follows:

SCIENTIFIC NOTATION FORM:

[tex]1.28*10^1^3[/tex]

Hope this helps!

Answer:

Brand A

Step-by-step explanation:

Brand A has a box of 25 forks for 1.99

Take the price per fork

1.99 /25 = .0796

              .08 per fork

Brand B has a box of 42 totals for 3.89

3.89 / 42

.092319048

.09 per fork

Answer: 19.2, I think.

Step-by-step explanation: 10*1.2 = 12.

To keep the ratio balanced, you must also do 16*1.2, which is 19.2. Making the ratio 12 : 19.2

The average speed of the truck is 50 m/s .

We know that the average speed of any vehicle is calculated by total distance divide by total time.

Now the truck travels at 50 m/s for 30 seconds.

Distance covered in 30 seconds = 50 × 30 = 1500 meters

Time taken = 30 seconds

average speed = 1500 / 30 = 50 m/s

The average speed now accounts for the majority of the distance travelled. Average speed is essentially a method for calculating distance and the rate of transit time.

Knowing the average speed is crucial because it is clear that the pace will vary throughout the voyage. The average speed of a vehicle or an object can be determined using a variety of methods.

That is the most popular and simple way for figuring your average speed. It functions best when the object's speed remains constant throughout the journey, never rising or falling.

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Answer:

Step-by-step explanation:

Hi, Julia,  they are trying to ask about error, or the confidence that there is not an error. It's kinda like saying,  we're 100% sure the answer is correct, mostly :DDDD   which really lowers your confidence about the 100% correct statement.   Anyway,  sooo then they give the way to show deviation,  from something.  if you've had Calculus one,  this is the same thing as the Delta , Epsilon thing, about a small distance away from the target is still with in a certain range.   I feel like if they had written the inequality like this...

( p' - E) < p < (p'+E)   it would be clearer about the inequality.  E is just a tiny distance away in the positive and negative direction.  E plays the role of epsilon.  the numbers they give are the range of the confidence. I don't think they ask a very clear question.  

0.056<p<0.112

p is kinda like our "best guess"  answer, and we're giving it this range that it's probably within,   for a certain level of confidence.   You can see, that as the confidence goes down,  that range can become bigger.  

The measure of the exterior angle is 139 degrees.

The sum of the interior angle of a triangle is 180 degree.

The sum of angles on a straight line is 180 degrees.

From the diagram;

First, we determine the third interior angle of the triangle.

Angle 1 + Angle 2 + Angle 3 = 180

64 + 75 + Angle 3 = 180

139 + Angle 3 = 180

Angle 3 = 180 - 139

Angle 3 = 41 degrees

Now, angle 3 and the exterior angle forms a angle on a straight line.

Hence;

Angle 3 + Exterior angle = 180

41 +  Exterior angle = 180

Exterior angle = 180 - 41

Exterior angle = 139 degrees.

Therefore, 139 degrees is the exterior angle.

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Therefore , the solution of the given problem of interest comes out to be $4,088.14 is the new balance.

Divide the number by the expense of borrowing, the remaining time, and other factors to get the simple interest rate. In marketing, the straightforward return plan is principal interest payments plus hours. This technique is the simplest way to figure out interest. The most common way to determine income is as a percentage of the principal sum.

Here,

We must first figure out the interest on the present balance.

The interest rate is 27.99%/12, or 0.0233, per month.

As a result, the current balance's interest rate is:

=> 3,109.87 x 0.0233 = $72.43

When this interest is added to the outstanding amount, Kye's new balance is as follows:

=>  3,109.87 + 72.43 + 532.42 = $3,714.72

The minimum payment for the new amount must now be determined:

=>  3,714.72 x 0.02 = $74.29

Kye's minimum payment for the following month will be $159.00 because the minimum payment is the higher of $74.29 or that amount.

Kye's new balance with interest as a result of making the required minimum contribution and spending $532.42 is as follows:

=>  3,714.72 - 159.00 + 532.42 = $4,088.14.

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The greatest width possible if the length of the rectangular lot is 25 ft longer than twice the width and if the perimeter of the lot cannot exceed 350 ft is 50 ft.

We are given,

The length of the rectangular lot is 25 ft longer than twice the width.

The perimeter of the lot cannot exceed 350 ft.

Let the width of the rectangular lot be x.

So, the length of the rectangular lot =  2x + 25

We know that the perimeter of the rectangle is given by:

P = 2(L + W)

Substitute the given values in the above formula;

350 = 2(2x +25 + x)

350 / 2 = 3x + 25

175 - 25 = 3x

x = 150 / 3

x = 50 ft

So, the width of the rectangular lot = 50 ft

And, the length of the rectangular lot = 2 * 50 + 25 = 125

Thus, the greatest width possible if the length of the rectangular lot is 25 ft longer than twice the width and if the perimeter of the lot cannot exceed 350 ft is 50 ft.

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The length of q, to the nearest 10th of a centimeter, is 8.8 cm.

We are given the following;

In ΔQRS, s = 7.9 cm, ∠Q=125° and ∠R=23°.

The third angle can be calculated using the angle sum property:

angle Q + angle R + angle S = 180 degrees

125 degrees + 23 degrees + angle S = 180 degrees

angle S = 180 - (125 + 23) degrees

angle S = 180 - 148 degrees

angle S = 32 degrees

To find the length of q we shall apply the Sine rule.

q / Sin Q = s / Sin S

q / Sin 125 = 7.9 / Sin 32

by cross multiplication we will get;

q = (7.9 x Sin 125) / Sin 32

q = (7.9 x 0.61) / 0.55

q = 8.8 cm (approximately)

So,  the length of q is 8.8 cm.

Thus, the length of q, to the nearest 10th of a centimeter, is 8.8 cm.

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Answer:

48

Step-by-step explanation:

1/3+(1/2*2/3)+(1/4*1/3)=3/4

1-3/4=1/4

So 12 book were 1/4 of the shipment.

So 48 book sis total.

Each student should work for 7 hours on the project.

Given, the equation the quantity x plus 56 end quantity over 3 equals 5 times x models the workload of a class project,

where x is the number of hours each student must contribute.

Now, according to question,

56 - 3x = 5x

56 = 5x + 3x

8x = 56

x = 7

So, x = 7 hours

Hence, each student should work for 7 hours on the project.

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Answer:

4 hours

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

x = 14/3

Decimal Form:

x = 4.6

Mixed Number Form:

x = 4 2/3

Therefore, 4 hours is how much the students work on the project.

Answer:

The third option, as x approaches infinity y approaches infinity and as x approaches negative infinity y approaches negative infinity.

Step-by-step explanation:

The equation y = -|x - 3| + 2 written as a piecewise function is;

f(x) = {y = x - 1, if x < -3

        {y = -x + 1, if x ≥ -3

A function can be written as piecewise function if it changes its behavior ( increasing or decreasing ) about a point.

The function f(x) = y = |x| changes its behavior at |x| = 0 i.e , x = 0 .

y = | x | = x , if x < 0

= - x , if x > 0

| x | = a => x = ± a

• | x | ≥ a ( a ≥ 0 ) => x € ( -∞ , -a ] U [ a , ∞ )

• | x | ≤ a ( a ≥ 0 ) => x € [ -a , a ]

The given function is : y = -|x - 3| + 2

The function will change its behavior when; -| x - 3 | = 0

-x + 3 = 0

x = -3

If x < -3 , then ;

y =  -(-(x - 3)) + 2

y = x -3 + 2

y = x - 1

If x ≥ -3, then ;

y = -(x - 3) + 2

y = -x + 3 + 2

y = -x + 1

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