Express using algebra A stick l feet long is broken into 2 parts one of which is twice as long as the other. How long is the shorter piece

Answer:

y = 3x + 4

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (1, 7) ← 2 points on the line

m = [tex]\frac{7-4}{1-0}[/tex] = [tex]\frac{3}{1}[/tex] = 3

the line crosses the y- axis at (0, 4 ) ⇒ c = 4

y = 3x + 4 ← equation of line

Answer:

14

Step-by-step explanation:

let n be the number then 2 times the number is 2n and so

2n - 9 = n + 5 ( subtract n from both sides )

n - 9 = 5 ( add 9 to both sides )

n = 14

then the required number is 14

The total pay that Nelly will get for last week is £220.

From the information given, the following can be deduced:

£8 per hour for the first 15 hours

£10 let hour for any extra hour.

The above are applicable for Monday to Friday.

£16 is the rate for Saturdays.

The number of hours that Nelly worked from Monday to Friday will be:

= 3 1/2 + 5 + 2 1/2 + 4 + 2

= 17 hours

On Saturday, he worked 5 hours.

The total earnings will be:

= (£8 × 15) + (£10 × 2) + (£16 × 5)

= £120 + £20 + £80

= £220

The total amount is £220.

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The value of H (Hypotenuse) will be 54.93

A triangle is a three sided polygon, which has three vertices and three angles which has the sum 180 degrees.

Given that;

The values are,

⇒ cos θ = 0.8192

⇒ A (Base) = 45

Now,

Since, The values are,

⇒ cos θ = 0.8192

⇒ A = 45

We know that;

⇒ cos θ = Base (A) / Hypotenuse (H)

Substitute all the values, we get;

⇒ 0.8192 = 45 / H

⇒ H = 45 / 0.8192

⇒ H = 54.93

Thus, The value of H (Hypotenuse) = 54.93

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Answer:

The area of the shaded region is 36.

In rectangle ABCD, point E lies halfway between sides AB and CD and halfway between sides AD and BC. This means that line segment AE is parallel to line segment CD and is half as long, and line segment BE is parallel to line segment AD and is also half as long.

Since AE is half as long as CD, and CD is twice as long as AE, we can say that CD is equal to 2 * AE. Similarly, since BE is half as long as AD, and AD is twice as long as BE, we can say that AD is equal to 2 * BE.

Since AD is equal to 2 * BE and CD is equal to 2 * AE, the lengths of AD and CD are equal. This means that the shaded region is a parallelogram with sides of equal length.

The area of a parallelogram is equal to the product of its base and height. In this case, the base of the parallelogram is 6 (the length of side BC) and the height is AE + BE (the combined length of the two sides of the parallelogram).

We know that AE is half as long as CD, and CD is twice as long as AE, so CD is equal to 2 * AE. Since CD is equal to 2 * AE, AE is equal to CD / 2. Since CD is equal to 11 (the length of side AB), AE is equal to 11 / 2 = 5.5.

Similarly, we know that BE is half as long as AD, and AD is twice as long as BE, so AD is equal to 2 * BE. Since AD is equal to 2 * BE, BE is equal to AD / 2. Since AD is equal to 6 (the length of side BC), BE is equal to 6 / 2 = 3.

The combined length of AE and BE is 5.5 + 3

Answer:

The expression is B. 30m

Answer:

29.0 m

Step-by-step explanation:

[tex]\boxed{\begin{minipage}{4cm}\underline{Area of a semicircle}\\\\$A=\dfrac{1}{2}\pi r^2$\\\\where:\\\phantom{ww}$\bullet$ $r$ is the radius\\ \end{minipage}}[/tex]

Given the area of the semicircle is 50 m², substitute this into the formula and rearrange to isolate r:

[tex]\begin{aligned}\implies\dfrac{1}{2}\pi r^2&=50\\\pi r^2 & = 100\\r^2 & = \dfrac{100}{\pi}\\r&=\sqrt{\dfrac{100}{\pi}}\end{aligned}[/tex]

The perimeter of a semicircle is the sum of the diameter of the circle and half its circumference.

Therefore:

[tex]\begin{aligned}\textsf{Perimeter of a semicircle}&=2r+\pi r\\&=r(2+\pi)\\&=\sqrt{\dfrac{100}{\pi}}(2+\pi)\\&=29.0083301...\end{aligned}[/tex]

Therefore, the perimeter of the semicircle is 29.0 m (1 d.p.).

The correct answer is option (d) - one proportion z-test.

The complete question is

A research company is claiming that 75% of college students shop online. Jamila takes a sample of 200 college students and finds that 120 college students shop online. Which type of inference test should Jamila use?

a) Chi-squared test for homogeneity

b) Two-way ANOVA O

c) One-sample t-test

d) One proportion z-test

To determine which type of inference test to use in this situation, Jamila needs to consider the following:

   The research question: In this case, the research question is whether the proportion of college students who shop online is significantly different from the proportion claimed by the research company (75%).

   The type of data: Jamila has collected data on a sample of college students, rather than the entire population.

   The type of variables: The variable of interest is a binary variable (students either do or do not shop online), and the proportion of students who shop online is being compared to a fixed value (75%).

Given this information, the appropriate test to use is a one proportion z-test. The one proportion z-test is a statistical test that is used to determine whether the proportion of a binary variable in a sample is significantly different from a known proportion in the population.

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The chromosomes in the image are called sex chromosomes, and the chances of being born male or female are 1:1.

In Science, a chromosome can be defined as a thread-like linear strand of deoxyribonucleic acid (DNA) that is typically found in the nucleus of each cell in a living organism.

In Genetics, some of the characteristics of a chromosome include the following:

Furthermore, the human somatic cell primarily comprises 46 chromosomes which are normally sub-divided into 23 pairs of chromosomes with 22 of these pairs being autosomes and a pair of sex chromosomes (X and Y).

In this context, we can reasonably infer and logically deduce that the x and y chromosomes are generally referred to as sex chromosomes.

Since Sarah received 23 chromosomes each from her mother and father, the chances of being born male or female is given by;

Ratio = 23: 23.

Dividing both sides by 23, we have;

Ratio = 1:1.

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(y + 3) is not a factor of the polynomial y^3-6y+9.

A polynomial is an equation made up of terms, exponents, constants, variables (or indeterminate values), and variables. The polynomial 3x2 -2x-10 is an illustration. Sums of terms of the form kxn, where k is any number and n is a positive integer, make up polynomials. For instance, the polynomial 3x+2x-5. a description of polynomials. The concepts degree, standard form, monomial, binomial, and trinomial are all covered in this video. An expression that consists of variables, constants, and exponents that is combined using mathematical operations like addition, subtraction, multiplication, and division is referred to as a polynomial (No division operation by a variable).

Given,

Polynomial

y³ - 6y + 9

(y+3) as a factor

(y + 3) (y+3)

y² + 3y + 3y + 9

y² + 6y + 9

(y + 3) is not a factor of the polynomial: y^3-6y+9.

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The number of new members that are women will be 25 women.

The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.

A games group has 65 men and 35 ladies as individuals. Another movement has quite recently started and a few new individuals have joined. Considering that the quantity of men is currently 60% of the absolute number of individuals.

The number of new members is 50.

Let the number of new men be 'x'. Then the equation is given below.

(65 + x) / (100 + 50) = 60%

(65 + x) / 150 = 0.60

65 + x = 90

x = 25

The number of new members were women will be given as,

⇒ 50 - 25

⇒ 25

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Answer:

D

Step-by-step explanation:

Because whee your finding the Grange of a fundtlon you Look at the Y value from the smallest Number to the largest Number.

Answer:

  16 units

Step-by-step explanation:

You want the side length of a square pyramid with height 15 units and slant height 17 units.

The Pythagorean theorem can be used to find the distance from the midpoint of one side to the center of the square base.

  (b/2)² +15² = 17²

  (b/2)² = 289 -225 = 64

  b/2 = √64 = 8

Then the length of one side of the base is ...

  b = 2·8 = 16 . . . . units

The researcher who needs more students for her study in order to obtain the desired margin of error would be: Researcher 1. The correct answer is the first option.

Researcher 1 needs more students for her study in order to obtain the desired margin of error, because she wants to estimate with 99% confidence, while Researcher 2 wants to estimate with 95% confidence.

The margin of error and the level of confidence are connected together. A better margin of error may be resulted for a lesser level of confidence, or a higher level of confidence may be obtained by tolerating a larger margin of error.

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The sum of two even integers and one odd integer will be an odd integer. Then the correct option is D.

If the number is divisible by 2 then the number will be an even number. Similarly, if the number is not divisible by 2 then the number will be an odd number.

Some of the properties of the even and odd number are given below.

The sum of two even numbers will be even and the sum of two even numbers and odd numbers will be odd numbers.

The amount of two even whole numbers and one odd whole number will be an odd whole number. Then, at that point, the right choice is D.

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The correct answer is Option A: Proposition I is true and Proposition II is true.

A researcher can use Pearson's chi square test of independence to determine if two nominal variables are independent or not. In this case, the researcher observed a chi-square value of 10.00430.

To determine whether the null hypothesis should be accepted or rejected, the researcher must compare the chi-square value to a critical value associated with the desired level of significance.

At the 5% significance level, the critical value is usually around 7.815, and at the 1% significance level, the critical value is usually around 10.827. Since the observed chi-square value (10.00430) is higher than the critical values for both the 5% and 1% significance levels, the appropriate decision could be a Type II Error for both levels of significance.

In other words, Proposition I (At the 5% significance level the appropriate decision could be a Type II Error) and Proposition II (At the 1% significance level the appropriate decision could be a Type II Error) are both true.

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Answer:

-20*(-4)=80

Step-by-step explanation:

-20*(-4)=20*4

20*4=80

The no: of red marbles, that the bag contains if it has 24 purple marbles are 30 marbles.

a single state. This has an identity element in math, in an algebra. Whose inverse is equivalent to its adjoint (in mathematics, linear algebra, mathematical study of a matrix or operator).

The unitary method's formula is to identify the value of a single unit, then multiply that value by the number of units to obtain the required value.

A unitary government is a type of government in which the whole government is controlled by a single entity, known as the central government. Actually, the center of authority for all administrative divisions and powers.

In the given question,

for every 4 purple marbles there are 5 red marbles

then for 1 purple marble there is 5/4 red marbles

again for 24 purple marbles, there are 30 red marbles

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Answer:

Step-by-step explanation:

The quadratic equation whose roots are -6 and 3/4 is 14x²+21x-18=0

We should know that a quadratic equation is that whose highest power of the variable is 2

The given roots are

x=-6 and x=3/4

Let (x+6)(x-3/4)=0

Multiplying the brackets we have

[tex]X^{2}-\frac{3x}{4} +6x-\frac{18}{4}[/tex] =0

Find the LCM of the denominators

[tex]\frac{4X^{2}+21x-18 }{4} =0[/tex]

Cross and multiplying we have

[tex]4x^{2} +21x-18=0[/tex]

Therefore, the equation  is expressed in the form ax²+bx+v=0 Where a=4, b=21 and c=-18

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A number type which is more appropriate for the domain of H include the following: A. Integers.

The appropriate domain include the following: C. 2000 ≤ y ≤ 2010.

In Mathematics, an integer can be defined as a whole number that may either be positive, negative, or zero (0). This ultimately implies that, a positive integer simply refers to a whole number that is greater than or equal to one (1) such as 1, 10, 20, 2000, 2010, etc.

In Mathematics, 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 or numbers (x-values) to a function and the domain of a graph comprises all the input numerical values (real numbers) which are located on the x-coordinate.

Since the variable H(y) represents the leading number of home runs for season y of the National League between the years 2000-2010, an appropriate domain is given by;

Domain = 2000 ≤ y ≤ 2010 or [2000, 2010].

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Complete Question:

Which number type is more appropriate for the domain of H?

A. Integers

B. Real numbers

What's the appropriate domain?

0 ≤ y < 2010

0 < y < 73

2000 ≤ y ≤ 2010

42 ≤ y < 73

The probability of randomly drawing 2 red marbles is P = 0.476

On the box we have 7 marbles, 5 red ones and 2 green ones. If we assume all the marbles have the same probability of being randomly drawn, then the probability of drawing a red marble is equal to the quotient between the number of red marbles and the total number of marbles.

So the probability for the first red marble is:

p = 5/7

For the second one, we will have one red marble less and one marble of the total less, so the probability is:

q = 4/6

The joint probability is the product of these two:

P = (5/7)*(4/6) = 0.476

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Answer:

A. ∠1 = ∠7

B. ∠2 = ∠6

D. ∠6 + ∠7 = 180°

Step-by-step explanation:

⭐ Why A is correct

⭐ Why B is correct

❌ Why C is incorrect

⭐ Why D is correct

Answer:

616.25 [tex]yd^2[/tex]

Step-by-step explanation:

The equation for the area of a circle is

[tex]A=\pi r^2[/tex]

Since the problem does not give a value for r, it must be derived.  Recall that the equation for the circumference of a circle is

[tex]C=2\pi r[/tex]

Using the given value of the circumference,

[tex]C=88yd=2\pi r[/tex]

So,

[tex]88yd=2\pi r\\\frac{88yd}{2\pi}=r\\14.01yd=r[/tex]

Insert the derived value of r into the formula for area:

[tex]A=\pi r^2\\A=\pi(14.01yd)^2\\A=616.25yd^2[/tex]

To find the distance that the first shuttle traveled before it was passed by the second shuttle, we need to use the formula d = rt, where d is the distance traveled, r is the speed at which the shuttle is traveling, and t is the time elapsed. We can use this formula to find the distance traveled by each shuttle and then subtract the distance traveled by the first shuttle from the distance traveled by the second shuttle to find the distance the first shuttle traveled before it was passed.

For the first shuttle, the speed is 39 miles per hour and the time elapsed is 30 minutes. Since there are 60 minutes in an hour, the time elapsed in hours is 30 minutes / 60 minutes/hour = 0.5 hours. So, the distance traveled by the first shuttle is 39 miles/hour * 0.5 hours = 19.5 miles.

For the second shuttle, the speed is 42 miles per hour and the time elapsed is 30 minutes. Since there are 60 minutes in an hour, the time elapsed in hours is 30 minutes / 60 minutes/hour = 0.5 hours. So, the distance traveled by the second shuttle is 42 miles/hour * 0.5 hours = 21 miles.

Therefore, the distance that the first shuttle traveled before it was passed by the second shuttle is 21 miles - 19.5 miles = 1.5 miles.

This program uses a list to represent the line and the built-in Python list methods insert(), pop(), and append() to manage the line according to the specified events.

This program represents the line with a list and manages the line using the built-in Python list methods insert(), pop(), and append().

Here is one way you could implement this program using a Python list:

# Initialize the list of women waiting in line

line = ["Samantha", "Emily", "Rebecca", "Karen", "Linda"]

# Jenny arrives and joins the front-of-the-line

line.insert(0, "Jenny")

print(line) # Output: ['Jenny', 'Samantha', 'Emily', 'Rebecca', 'Karen', 'Linda']

# The woman third in line leaves the line

line.pop(2)

print(line) # Output: ['Jenny', 'Samantha', 'Emily', 'Karen', 'Linda']

# Alice joins the line

line.append("Alice")

print(line) # Output: ['Jenny', 'Samantha', 'Emily', 'Karen', 'Linda', 'Alice']

The final list after all events have occurred is ['Jenny', 'Samantha', 'Emily', 'Karen', 'Linda', 'Alice'].

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