Range of a data set
Alan is recording the percentages he earned an each quiz in his math dass. Here are this results for the last 7 quizzes.
79, 91, 76, 87, 93, 79,94
Find the range of the data set.
5

Answer:

V= 30m/s u=0 A=1.5, time t=? distance S=?

Step-by-step explanation:

to find time:

A=v-u/t

t=v-u/a

t =30-0/1.5

t = 20 secs

to find distance S

S= UT +½at²

S= 0×20+ 1.5×20²/2

s= 300m

If there are three blue marbles, five red marbles, and four green marbles, the probability of selecting a red marble is

Remember that the probability is the ratio between the number of events and the total number of all the events. In this case, the number of events is 5 because there are 5 red marbles, and the total number of all events is the sum of all the marbles.

Therefore, the probability of selecting red marbles is 5/12.

Notice that we have three different ratios, that is because each time we select a red marble it represents a different situation since we won't place back the red marble into the bag, that's why each event decreases by one and each denominator too.

Therefore, the probability of selecting three red marbles without replacement is 15/33.

As we said before, in Part B, we had to multiply each probability for each time we select a red marble. It's important to notice that the numerators decreased by 1 (5,4,3) because each time we select a marble we won't place it back, that's the reason why the denominator also decreased by 1.

The height of the ball be after 3 seconds will be 72.2 feet.

From the information given, it should be noted that the astronaut on the moon throws a baseball upward and the height of the ball in feet

(y) is related to the number of seconds since the ball was thrown (x).

In this case, it should be noted that the function is illustrated as:

y = -2.7x² + 30x + 6.5

Therefore, it was given that x = 3. It should be noted that this will be put back into the function. This will be:

y = -2.7x² + 30x + 6.5

y = -2.7(3)² + 30(3) + 6.5

y = -24.3 + 90 + 6.5

y = 72.2

The height is 72.2 feet.

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Probability of an experiment consists of rolling a fair 15 -sided die with an event of rolling a number divisible by 3 is P(E)=(1 /3).

As given ,

Total number of outcomes of an experiment consists of rolling a fair 15-sided die 'n'

={1, 2, 3, …., 14, 15}

=15

Number of outcomes of an event 'E' showing rolling a number divisible by 3 'n(E)'

={3,6,9,12,15}

=5

Probability of event showing rolling a number divisible by 3 'P(E)'

=(Total number of favourable outcomes)/(Total number of outcomes)

=n(E)/n

= 5/15

=1/3

Therefore, probability of an experiment consists of rolling a fair 15 -sided die with an event of rolling a number divisible by 3 is P(E)=(1 /3).

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Answer:

5 times the length of the short piece = 75 inches

The length of the short piece =75 / 5 = 15 inches

Length of the long piece = 4 times the length of the short piece = 60 inches

Check: 15 + 60 = 75 inches

yay

In order to find the solution of this compound inequation, let's first divide it in two inequations:

Solving the first inequation, we have:

Now, for the second inequation, we have:

Putting both solutions together:

So the correct option is C.

Ratio in three ways are given below.

The ratio is the number that can be used to represent one quantity as a percentage of another, to put it simply. A ratio's two numbers can only be compared if they share the same unit. Ratios are used to compare two objects. a connection between two values that is typically expressed as the quotient of one value divided by the other. For instance, the ratio of red to blue marbles is 6:4, or six red to four blue marbles, in the case of a box containing six red and four blue marbles. A decimal or percentage can also be used to indicate a ratio.

Given Data

An orchard contains 12 rows of Granny Smith apple trees, 10 rows of Fuji apple trees, 15 rows of Gala apple trees, 2 rows of Golden Delicious apple trees, and 2 rows of Jonathan apple trees.

a) Rows of Gala apple trees to Granny apple smith trees:

Ratio

First way = 15 to 12

Second way = 15:12

Third way = [tex]\frac{15}{12}[/tex]

b) Rows of Fuji apple trees to total number of apple trees

Total number = 12 + 10 + 15 + 2 +2

Total number = 41

Rows of Fuji apple trees = 10

First way = 10 to 41

Second way = 10: 41

Third way = [tex]\frac{10}{41}[/tex]

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The constant of proportionality on the equation is 5.

What is constant of proportionality?

Constant of proportionality is defined as the ratio that relates two given value. When two values are directly or indirectly proportional to one another, there relation is expressed as y = kx.

We compare the general direct proportionality relation with the equation given.

The equation given : y = 5x

The direct relationship between y and x is :

y α x

y = kx - - - (1)

Where, y and x are variables and k is the constant of proportionality.

Comparing equation (1) with the equation given :

y = kx

y = 5x

We can observe that, k in the equation (1) equals to 5 in the given equation.

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a. Yes, The situation represents a function.

The independent variable is number of lines and dependent variable is the total cost.

b. The range is 0 ≤ y ≤ 120 and the domain is 0 ≤ x ≤ 4.

What is Domain?

The set of all inputs of the function is called Domain of set.

Given that;

A cell phone plan costs $30 for each line.

Now, Let the number of lines be x and total cost be y.

So, We can evaluate;

y = 30x

Thus, This equation represent Linear function.

So, The situation represents a function.

The independent variable is number of lines and dependent variable is the total cost.

Since, You can have a maximum of four lines on a plan.

So, The possible values are;

x = 0, 1, 2, 3, 4

After substitute all the value of x in equation y = 30x we get;

For x = 0

y = 30 × 0 = 0

For x = 1

y = 30 × 1 = 30

For x = 2

y = 30 × 2 = 60

For x = 3

y = 30 × 3 = 90

For x = 4

y = 30 × 4 = 120

Thus, The range of the function will be 0 ≤ x ≤ 4.

And, The domain of the function will be 0 ≤ y ≤ 120.

Therefore,

a. Yes, The situation represents a function.

The independent variable is number of lines and dependent variable is the total cost.

b. The range is 0 ≤ y ≤ 120 and the domain is 0 ≤ x ≤ 4.

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The length of the rectangle is 30 feet and the width of the rectangle is 15 feet.

Let l be the length l the rectangle and w be the width of the rectangle.

The area of a rectangular living room is 450 square feet.

⇒ A = l × w

⇒ 450 = l × w                     ................(1)

The length of the room is 15 feet less than three times the width.

So we get an expression,

l = 3w - 15

Substitute above vale of l in equation (1)

450 = (3w - 15) × w        

450 = 3w² - 15w

3w² - 15w - 450 = 0

w² - 5w - 150 = 0

(w - 15)(w + 10) = 0  

w - 15 = 0  or w + 10 = 0

w = 15    or    w = -10

But width of the rectangle cannot be -10

So, w = 15 feet

and l = 3(15) - 15

l = 30 feet

Therefore, the length of the rectangular living room is 30 feet and the width is 15 feet.

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The dollar amount the club would contain if half of the students at the school each provided 50 cents T - 0.5n.

A number, a variable, or a mix of numbers, variables, and operation symbols make up an expression. Two expressions joined by an equal sign form an equation.

The dollar amount the club would contain if they reached half of their goal T + 50.

The dollar amount the club would contain if every student at the school donated 50 cents to the cause 0,5T.

The dollar amount the club could donate if they earned $50 more than their goal of 0.25n.

The dollar amount the club would still require to expand to achieve its goal after every student at the school donated 50 cents 0.5n.

The dollar amount the club would contain if half of the students at the school each provided 50 cents T - 0.5n.

The complete question is:

To support a local senior citizens center, a student club sent a flyer home to the n students in the school. The flyer said, "Please bring in money to support the senior citizens center. Paper money and coins accepted!" Their goal is to raise T dollars. Match each quantity to an expression, an equation, or an inequality that describes it. A: the dollar amount the club would have if they reached half of their goal 1: B: the dollar amount the club would have if every student at the school donated 50 cents to the cause 2: C: the dollar amount the club could donate if they made $50 more than their goal 3: D: the dollar amount the club would still need to raise to reach its goal after every student at the school donated 50 cents 4: E: the dollar amount the club would have if half of the students at the school each gave 50 cents 5: Which statement matches with T + 50?

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the error in the equation is 3 is not multiplied by 4 which gives wrong value of x .

A linear equation is a first-order (linear) term and a constant in an algebraic equation of the type y=mx+b, where m is the slope and b is the y-intercept. The previous equation, which has the variables y and x, is sometimes referred to as a "linear equation with two variables."

The typical form for linear equations with two variables is Ax+By=C. For instance, the linear equation 2x+3y=5 is in standard form. Finding both the intercepts of an equation in this way is quite easy (x and y).

3 (x + 4) = 13

3x + 12 = 13          \\the place where the error was occurred in the question\\

3x = 1

x = 1/3

this is correct value of x

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The verdict on whether the frequency distribution given appears to be normal is; No, the distribution is not symmetric.

It follows from the task content that it is required to determine if the frequency distribution as given appears to be normal.

On this note, since a major distinctive feature of a normal distribution is that; there is a concentration of frequency in the middle and additionally, a normal distribution infers symmetry in the frequency distribution.

Therefore, since none of the data values (speed) can be chosen as the middle value, and the distribution is not symmetric, it follows that;

The frequency distribution in discuss is not a normal distribution because the distribution is not symmetric.

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Check the picture below.

so is more or less the figure of a rectangular prism with a right-cylinder underneath that has a radius of 1, since it has a diameter of 2.

now, if we just get the volume of the prism, and then the volume of half of the cylinder, because only half-cylinder is really inside the prism, and then subtract that half-cylinder volume from that of the prism, what's leftover is the volume of the figure only.

[tex]\stackrel{\textit{volume of a cylinder}}{V=\pi r^2 h}\hspace{5em}\stackrel{\textit{volume of half a cylinder}}{V=\cfrac{1}{2}\pi r^2 h} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{\LARGE volumes}}{\stackrel{prism}{(4)(4)(8)}~~ - ~~\stackrel{half~cylinder}{\cfrac{1}{2}\pi (\underset{r}{1})^2(\underset{h}{8})}}\implies 128~~ - ~~4\pi ~~ \approx ~~\text{\LARGE 115.43}~cm^3[/tex]

A total of 8 cups of mix is needed for a Gatorade recipe calls for 2 cups of mix for every 4 cups of water if you have a total of 16 cups of water.

The unitary technique in actuality involves first determining the actual value of a single unit, alongside followed by the value of the necessary number of units.

The unitary approach is a kind of a strategy for problem-solving that involves first determining the value of a single unit, then multiplying that value to determine the required value.

2 mix for 4 cups of water

⇒ 1 mix for 2 cups

⇒ for 1 cup = 1/2 mix

so for 16 cups = 8 mix

A single or distinct unit is referred to by the word unitary. Therefore, the goal of this strategy is to establish values in reference to a single unit.

The unitary technique, for instance, can be used to calculate how many kilometers a car will go on one liter of gas if it travels 44 km on two liters of fuel.

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Step-by-step explanation:

Answer:

155

Step-by-step explanation:

4(-5)^2-11x

-5 squared is 25, times 4 =100, -11times-5 is 55 (positive) so 100+55=155

P (-5), replace x by (-5).

Solve the parentheses:

Combine like terms:

Line C has the constant of proportionality between y and x of 2/3.

For the given question;

Constant of proportionality = change in y / change in x

Check for each line;

Line A; select any coordinate from the graph.

(7, 3); Put in the formula

Constant of proportionality = 7/3

Thus, Line A has Constant of proportionality between y and x of 7/3.

Line B; select any coordinate from the graph.

(4, 3); Put in the formula

Constant of proportionality = 4/3

Thus, Line B has Constant of proportionality between y and x of 4/3.

Line C; select any coordinate from the graph.

(2, 3); Put in the formula

Constant of proportionality = 2/3

Thus, Line C has Constant of proportionality between y and x of 2/3.

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Answer:

Danladi is correct

Step-by-step explanation:

Danladi is correct because 2^3×4^2 equals 128

8 to the 6th is 262144 and to the 5th is 32768

The measure of angle PSR is 105°.

An arc's angle at the center of the circle is twice as large as its angle at any other point on the circumference.

Given:

The centre of the circle is O.

P, R, and S are points on a circle.

∠POR = 150°

Let Q be a point on the circumference of the circle with centre O.

By half angle property,

∠POR = 2∠PQR

∠PQR = [tex]\frac{1}{2} * 150[/tex] = 75°

In the figure, the points on the circle PQRS form a cyclic quadrilateral.

A cyclic quadrilateral has opposite angles that measure a total of 180 degrees.

∠PQR + ∠PSR = 180°

∠PSR = 180° - 75°

∠PSR = 105°

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The equation of the form [tex]f(x)=ax^2+bx+c[/tex] that must solve algebraically and f(1)=4, f(2)=13 and, f(4)=46 is [tex]\frac{5}{2}x^2+\frac{3}{2}x+5[/tex].

Putting x = 1 in the given equation, we get

[tex]f(1)=a(1)^2+b(1)+c[/tex]

f(1) = a + b + c = 4 ...(1)

Putting x = 2 in the given equation, we get

[tex]f(2)=a(2)^2+b(2)+c[/tex]

f(2) = 4a + 2b + c = 13 ...(2)

Putting x = 4 in the given equation, we get

[tex]f(4)=a(4)^2+b(4)+c[/tex]

f(4) = 16a + 4b + c = 46 ...(3)

Using elimination method to solve the set of linear equations, we get

(2) - (1), we get

3a + b = 9  ...(4)

(3) - (2), we get

12a + 2b = 33  ...(5)

Multiplying (4) by 2, we get

6a + 2b = 18 ...(6)

(5) - (6), we get

6a = 15

a = 15/6 = 5/2

Putting a = 5/2 in (4), we get

3(5/2) + b = 9

15/2 + b = 18/2

b = 3/2

Putting the values of a and b in (1), we get

5/2 + 3/2 + c = 9

4 + c = 9

c = 9 - 4

c = 5

Hence, the equation is [tex]\frac{5}{2}x^2+\frac{3}{2}x+5[/tex].

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The measure of largest exterior angles is 150 degrees

Exterior angles are defined as angles of a polygon formed or created by two the sides of that polygon and sharing a common endpoint.

It is important to note that the exterior angle of a triangle is congruent to the sum of the two non-adjacent interior angles that are opposite to each other.

They are also known to be angles formed by a transversal line as it cuts through one of two lines and it is located on the outside part of the line.

Given the angles as;

Note that the sum of exterior angles are 360degrees

5x° + 9x° + 10x° = 360°

collect like terms

24x = 360

Make 'x' the subject of formula by dividing both sides by 24

x = 360/24

x = 15

But the largest angle is 10x = 10(15) = 150°

Hence, the value is 150°

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The appropriate choice of ratio will be given by

Jonas got 30 oranges

What is ratio?

Ratio determines the comparision among many quantities with the same unit.

Here,

Let Mary got 3x oranges and Rejoice got 2x oranges

By the Problem,

                           [tex]2x = 24[/tex]

                             [tex]x = \frac{24}{2}[/tex]

                             [tex]x = 12[/tex]

Number of oranges Mary got = [tex]12 \times 3[/tex]

                                                 = [tex]36[/tex]

Number of oranges shared between Mary and Rejoice = [tex]24 + 36[/tex]

                                                                                            = [tex]60[/tex]

Fraction of oranges shared between Mary and Rejoice = [tex]1 - \frac{1}{3}[/tex]

                                                                                            = [tex]\frac{3 - 1}{3}[/tex]

                                                                                            = [tex]\frac{2}{3}[/tex]

Total number of oranges = [tex]\frac{60}{\frac{2}{3} }[/tex]

                                          = [tex]60 \times \frac{3}{2}[/tex]

                                          = [tex]90[/tex]

Number of oranges Jonas got = [tex]90 \times \frac{1}{3}[/tex]

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The results based on divisibility rules are given below -

A divisibility rule is a convenient shorthand for checking if an integer is divisible by a given set divisor without actually doing the division, typically by looking at the digits of the number.

Rule of Divisibility for 2: The given integer's final/unit digit must be an even number or a multiple of two, i.e., 0, 2, 4, 6, and 8.

Dividend Rule for Number 5: The provided number should have a unit digit of 0 or 5.

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Answer:

HI

Step-by-step explanation:

HOW ARE

Simplification of the given problems without absolute value sign:

1.  |5-x|-|x+8|, if x>5 is equal to -13.

2.  |x − 2| + |8 − x| + 2, if 2 ≤ x < 8 is equal to 8.

3.  |x − 5| − |2 − x| + |x + 1|, if x ≥ 5 is equal to x -2.

4.  |7 − x| + |4 − 2x| − |x − 8, if x < 2 is equal to 3 -2x.

As given,

Simplification of the given problems without absolute value sign:

1. |5-x|-|x+8|, if x>5

 = x - 5-(x+8)

 = x-5 -x-8

 = -13

2. |x − 2| + |8 − x| + 2, if 2 ≤ x < 8

= x -2+ 8 -x+2

=8

3. |x − 5| − |2 − x| + |x + 1|, if x ≥ 5

 = x-5-(x-2)+(x+1)

=x-5-x+2+x+1

=x-2

4. |7 − x| + |4 − 2x| − |x − 8, if x < 2

= 7-x +4-2x-8 +x

=3-2x

Therefore, simplification of the given problems without absolute value sign:

1.  |5-x|-|x+8|, if x>5 is equal to -13.

2.  |x − 2| + |8 − x| + 2, if 2 ≤ x < 8 is equal to 8.

3.  |x − 5| − |2 − x| + |x + 1|, if x ≥ 5 is equal to x -2.

4.  |7 − x| + |4 − 2x| − |x − 8, if x < 2 is equal to 3 -2x.

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The linear equation of given point (1, -7) and slope -1 is y = -x - 6.

Given:

Point(x₁ , y₁) = (1, -7)

Slope = -1

By using the Point-slope form of the linear equations, we get

y - y₁ = m(x - x₁)

⇒ y - (-7) = -1(x - 1)

⇒ y + 7 = -x + 1

⇒ y = -x + 1 - 7

⇒ y = -x - 6

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Let x be the number of game he can finish in 1 hour

1/4 = 1/3 hour

x = 1 hour

cross-multiply

1/3 x = 1/4

Multiply both-side of the equation by 3

x = 3/4 of his level game

He can finish 3/4 of his level game in an hour