which of the following is a correct interpretation of the expression -4 - (-7)

Answer:

24 cm

Step-by-step explanation:

Using the formula for a right cylinder: V = (pi)(r^2)(h) you can plug in the numbers provided

384(pi) = (pi) × (4^2) × h

<solve for h>

384(pi) = (pi) × (16) × h

<divide by 16pi>

24 = height

Answer:

24 = h

Step-by-step explanation:

V = πr²h

384π = π(4)²h

384π = 16πh

24 = h

After setting aside 4 hours for sports, Burt has 6 hours left for television. Since each movie is 2 hours, Burt can watch 3 two-hour movies in the remaining time.

Burt's parents allow him a total of 10 hours of television per week. Since he is planning to watch four hours of sports, we subtract this amount from the total to find the time remaining for watching movies. Here's how we solve for the number of movies Burt can watch:

Total TV time allowed: 10 hours per week

Time planned for watching sports: 4 hours

Time remaining for movies: 10 hours - 4 hours = 6 hours

Since each movie is two hours long, we then divide the remaining time by the length of one movie:

6 hours divided by 2 hours/movie = 3 movies

Therefore, Burt is planning to watch three two-hour movies this week.

Answer:

x = 20

Step-by-step explanation:

The two angle are a linear pair. Their measures has a sum of 180 deg.

2x + 140 = 180

2x = 40

x = 20

Answer:

8  rows of trees are there in the parcel.

Step-by-step explanation:

The number of trees planted in each row  = (3 x -2) trees

The total number of trees planted on  the land  = (24 x - 16)

Let us assume the total number of rows planted = m

Now,as we know:

The plants in each row x The number of rows = Total trees Planted

⇒   (3 x -2)  x (m)  =   (24 x - 16)

[tex]\implies m = \frac{24x-16}{3x-2}[/tex]

Simplifying for the value of m, we get:

[tex]m = \frac{24x - 16}{3x-2} = \frac{8(3x-2)}{3x-2} = 8\\\implies m = 8[/tex]

Hence,  the total number of rows planted = 8

Answer: 0.007 and 2.9

Step-by-step explanation:

1) 0.07 = 10m

divide by 10 on both sides

= 0.007

2) 10.1 = t + 7.2

subtract 7.2 from both sides

2.9 = t

The values are;

1. m = 0. 007

2.  t = 2.9

First, we need to know that algebraic expressions are defined as expressions that are made up of constants, factors, variables and coefficients.

From the information given, we have that;

1.  0.07 = 10m

First, divide both sides by the coefficient of m, we get;

m = 0.07/10

Divide the values

m = 0. 007

2. 10.1 = t + 7.2

collect like terms

't = 10. 1 - 7. 2

subtract the values

t = 2.9

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Answer:

The answer is A

Step-by-step explanation:

Answer:

The answer is A. 35 degrees

Step-by-step explanation:

The triangle has to measure up to 180 degrees

add the 2 known angles together

105 + 40 = 145

Subtract the total from 180

180-145= 35

the missing angle is 35

Check Answer:

to check your answer add up all the angle measurements

your total should add up to 180

35 + 40 + 105 = 180

Answer:

Step-by-step explanation:

25m - 100 = 450

25m = 450 + 100

25m = 550

m = 550/25

m = 22 <==== 22 months

Answer:

Therefore the inspector can perform three tests in 35 different ways.

Step-by-step explanation:

i) It is given that there is a total of seven tests that the inspector can perform.

ii) it is also given that the inspector needs to select or choose three tests only out of the seven.

iii) therefore this is a Combination problem.

iv) therefore the number of combinations or selections possible is given by

   [tex]\binom{7}{3} = \frac{7!}{(3!)(7 - 3)!} = \frac{7!}{(3!)(4!)} = \frac{42 \times 120}{6 \times 24} = \frac{42 \times 20}{24} = \frac{21 \times 10}{6} = \frac{7 \times 10}{2} = 35[/tex]

Therefore the inspector can perform three tests in 35 different ways.

Answer:

-5.5

Step-by-step explanation:

-2 + (-7/2) dividing 7 over 2 to give us -3.5

-2 + (-3.5)

that will give us -5.5

Answer:

1/7

Step-by-step explanation:

if 7 × (?) = 1, just take 1 and divide by 7. Thus, your answer is 1/7

Final answer:

To make 96 catnip mice, Douglas needs approximately 80 ounces of catnip.

Explanation:

To calculate how many ounces of catnip Douglas needs to make 96 catnip mice, we can set up a proportion using the given information. Since each catnip mouse requires 5/6 ounces of catnip, we can set up the proportion: 5/6 ounces / 1 catnip mouse = x ounces / 96 catnip mice. To solve for x, we cross-multiply and divide: (5/6) * 96 = x. Therefore, Douglas needs approximately 80 ounces of catnip to make 96 catnip mice.

Douglas needs 80 ounces of catnip to make 96 catnip mice.

To determine how many ounces of catnip Douglas needs to make 96 catnip mice,

we can use the given information that each catnip mouse requires 5/6 ounces of catnip.

To find the total amount of catnip needed,

we can multiply the amount of catnip required for one mouse (5/6 ounces) by the number of mice (96).

5/6 ounces/mouse * 96 mice =

(5/6) * 96 = 80 ounces

Therefore, Douglas needs 80 ounces of catnip to make 96 catnip mice.

Step-by-step explanation: Notice that the figure shown here is a rectangle so we can find its area by using the formula length x width.

Since the length is 3/7 in and the width is 2/8 in, we can plug this information into the formula to get (3/7)(2/8).

Now multiplying across the numerators and multiplying across the denominators we get 6/56 which can be reduced to 3/28 in².

Answer:

The transformation

[tex](x,y) \rightarrow (x-5,-y+1)[/tex]

maps triangle XYZ onto triangle X”Y”Z”.

Step-by-step explanation:

Let us take point Z on the XYZ triangle and see what sequence of transformations we have to apply to map it into the point Z''.

Now Z = (-2, 2) and Z'' = (-7, -1).

The x-coordinate goes from -2 ⇒ -7.

The y-coordinate goes from 2 ⇒  -1.

The x-coordinate is just shifted by -5; thus, [tex]x \rightarrow x-5[/tex], and the y-coordinate first transforms as [tex]y \rightarrow -y[/tex], and is then shifted by 1; thus, it transforms as [tex]y \rightarrow -y+1[/tex].

So we have the full transformation

[tex](x,y) \rightarrow (x-5,-y+1)[/tex]

The probability that Mark draws a yellow marble and then a green marble is 1/9.

To find the probability that Mark draws a yellow marble and then a green marble, we first need to find the total number of marbles in the bag. The bag contains 4 green marbles, 3 red marbles, and 2 yellow marbles, so the total number of marbles is 4 + 3 + 2 = 9.

Since Mark draws without replacement, the probability of drawing a yellow marble first is 2/9. After drawing a yellow marble, there are now 1 yellow marble and 8 total marbles left in the bag, so the probability of drawing a green marble second is 4/8, or 1/2.

To find the overall probability, we multiply the probabilities of the individual events. Therefore, the probability that Mark draws a yellow marble and then a green marble is (2/9) * (1/2) = 1/9.

The best approximation for the measure of angle ABC is 58.3° ⇒ 3rd answer

Step-by-step explanation:

Let us revise the trigonometry ratios in the right triangle ABC, where B is the right angle, AC is the hypotenuse, AB and BC are the legs of the triangle

The trigonometry ratios of the angle BAC, the opposite side to this angle is BC and the adjacent side to it is AB are

In Δ ABC

∵ ∠ BCA is a right angle

∴ The hypotenuse is AB

∵ The adjacent side to ∠ABC is BC

∵ AB = 20 centimeters

∵ BC = 10.5 centimeters

- Use cosine ratio to find the measure of the angle because you

   have the adjacent side of the angle ABC and the hypotenuse

∵ m∠ABC is x

∵ [tex]cos(x)=\frac{BC}{AB}[/tex]

∴ [tex]cos(x)=\frac{10.5}{20}[/tex]

- To find x use the inverse of cos(x)

∵ [tex]x=cos^{-1}(\frac{10.5}{20})[/tex]

∴ x = 58.33°

∴ m∠ABC = 58.33°

The best approximation for the measure of angle ABC is 58.3°

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The best approximation for the measure of angle ABC is 31.7°.

To find the measure of angle ABC (x), we can use trigonometric ratios. Since angle BCA is a right angle, we can use the sine function, which relates the opposite side to the hypotenuse in a right-angled triangle.

Let's denote the sides of the triangle as follows:

BC is the opposite side to angle ABC, with a length of 10.5 cm.

AB is the hypotenuse, with a length of 20 cm.

AC is the adjacent side to angle ABC.

Using the sine function, we have:

[tex]\[ \sin(x) = \frac{\text{opposite side}}{\text{hypotenuse}} = \frac{BC}{AB} \][/tex]

[tex]\[ \sin(x) = \frac{10.5}{20} \][/tex]

[tex]\[ \sin(x) = 0.525 \][/tex]

Now, we need to find the angle whose sine is approximately 0.525. Using a calculator or trigonometric tables, we can approximate the angle x. The angle whose sine is approximately 0.525 is about 31.7°.

Step-by-step explanation:

I think up to grade8 are middle school.

but I am not sure about my answer.

Answer:

6th, 7th, and 8th

Step-by-step explanation:

In America this is the standard middle school grades, however some schools diverge and also include 5th, or sometimes 9th. This, however,  is VERY uncommon.

Answer:

Quadrent One Two Three and Four

Step-by-step explanation:

The x- and y-axes divide the coordinate plane into four regions, called quadrants, named Quadrant I, II, III, and IV. They are numbered counterclockwise, with different quadrants containing points with different combinations of positive and negative x- and y-values.

The x- and y-axes of the coordinate plane divide the entire plane into four regions. These regions are known as quadrants. They are named as Quadrant I, Quadrant II, Quadrant III, and Quadrant IV.

The quadrants are numbered in a counterclockwise direction. Quadrant I, on the top right, contains all points with positive x- and y-values. Quadrant II, on the top left, contains all points with negative x-values and positive y-values. Quadrant III, on the bottom left, contains all the points with negative x- and y-values.

Last, Quadrant IV on the bottom right contains all the points with positive x-values and negative y-values.

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Answer:

The equation of line M in slope intercept form is    [tex]y=\frac{3}{2}x+1[/tex]

The equation of line M in standard form is  [tex]3x-2y=-2[/tex]

Step-by-step explanation:

step 1

Find the slope of line M

The formula to calculate the slope between two points is equal to

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

we have the points

(2,4) and (0,1)

substitute

[tex]m=\frac{1-4}{0-2}[/tex]

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

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

step 2

Find the equation of the line M in point slope form

[tex]y-y1=m(x-x1)[/tex]

we have

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

[tex]point\ (0,1)[/tex]

substitute

[tex]y-1=\frac{3}{2}(x-0)[/tex]

[tex]y-1=\frac{3}{2}x[/tex] ----> equation in point slope form

step 3

Find the equation of line M in slope intercept form

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

Isolate the variable y in the equation of the line in point slope form

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

Adds 1 both sides

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

step 4

Find the equation of the line M in standard form

[tex]Ax+By=C[/tex]

where

A is a positive integer

B and C are integers

we have

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

Multiply by 2 both sides

[tex]2y=3x+2[/tex]

[tex]3x-2y=-2[/tex] ---> equation in standard form

Final answer:

The equation of line m that contains the points (2, 4) and (0, 1) is found by calculating the slope which is 3/2, and using the y-intercept which is 1. The final equation of the line m is y = (3/2)x + 1.

Explanation:

To find the equation of line m in the xy-plane that contains the points (2, 4) and (0, 1), we first need to calculate the slope of the line. The slope m is calculated as the rise over the run. For our points, the slope can be found by the formula:

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

So,

m = (4 - 1) / (2 - 0) = 3 / 2.

Next, we use one of the points and the slope to find the y-intercept (b). Using the point (0, 1), we plug these values into the equation for a straight line y = mx + b:

1 = (3/2) × 0 + b

Therefore, b = 1.

The equation of line m is y = (3/2)x + 1.

Answer: OPTION C.

Step-by-step explanation:

You can observe in the picture given in the exercise that  [tex]\angle E[/tex] is formed by two secants intersecting outside the circle.

It is necessary to remember that, by definition:

[tex]Angle\ formed\ by\ two\ Secants=\frac{1}{2}(Difference\ of\ Intercepted\ Arcs)[/tex]

You can also identify that the Intercepted Arcs are the following:

[tex]CD=110\°\\\\AB=30\°[/tex]

Then, knowing the measures of the Intercepted Arcs, you can substitute them into the equation shown before and then evaluate, in order to calculate the measure of  [tex]\angle E[/tex] , which is the angle formed by the intersection of the secants.

Therefore, you get:

[tex]m\angle E=\frac{1}{2}(110\°-30\°)\\\\m\angle E=40\°[/tex]

49 seventh grade students are trying out for the team.

Step-by-step explanation:

Given,

Total students at tryouts = 75

Percent of seventh grade students = 65%

Number of seventh grade students = [tex]\frac{65}{100}*75[/tex]

Number of seventh grade students = 0.65*75

Number of seventh grade students = 48.75

Rounding off to near whole number

Number of seventh grade students = 49

49 seventh grade students are trying out for the team.

Keywords: percentage, division

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Answer:

309

Step-by-step explanation:

8x + 300 = 2772

subtract 300 from both sides of the equal sign

8x = 2472

divide 8 from both sides of the equal sign

x = 309

The total no. of seats that have been sold is 309

What are linear equalities in one variable?

The linear equation in one variable is an equation that is expressed within the form of ax+b = zero, where a and b are integers, and x is a variable and has only one answer.

Conclusion: For example, 2x+3=8 is a linear equation having a single variable in it. therefore, this equation has only one solution, which is x = 5/2.

let the auditorium sell x seats for 8 dollars per seat.

In addition to that auditorium made 300 dollars.

The total money earned by the auditorium by selling x seats and the addition of 300 dollars is 2772 dollars.

8x + 300 = 2772

8x = 2772 - 300

8x = 2472

x = 2472/ 8

x = 309

The above question is an example of linear equalities in one variable.

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Answer:a

Step-by-step explanation:

a

Answer:

20%

Step-by-step explanation:

x= 400000/2000000*100

x=20

Answer: x = a/(2 + 6z)

Step-by-step explanation:

a = 2x + 6xz

a = x(2 + 6z)

x = a/(2 + 6z)

Answer:

Step-by-step explanation:

a = 2x + 6xz ....factor out x on the right side

a = x(2 + 6z) ....divide both sides by 2 + 6z

a / (2 + 6z) = x <===

Answer:

Parallelogram

Step-by-step explanation:

This diagram shows that the opposite sides of the figure are equal.

The quadrilateral is Parallelogram.

A quadrilateral is a polygon having four sides, four points, and four vertices. The Latin words "quad," which means four, and "latus," which means side, are the source of the term "quadrilateral."

There are four basic types of quadrilaterals: parallelograms, squares, rectangles, and rhombuses. Parallelograms include the square, rectangle, and rhombus as well.

Given a quadrilateral,

in which opposite sides are parallel to each other,

the given figure shows opposite side are parallel to each other, so

according to definition of Parallelogram: The opposite sides of a parallelogram are parallel and of equal length. Additionally, opposite angles are equal.

Hence the Given  quadrilateral is Parallelogram.

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Answer:

The value of b for the intersection of two lines at given points is 4

Step-by-step explanation:

Given as :

The two line equations are

y = 2 x + 7                ..........A

And

y = 2.5 x + b            ............B

Since, The two lines are intersecting at point  [tex]x , y[/tex] = - 6 , - 5

Now Solving equation A and B we get

2 x + 7 = 2.5 x + b

Or, 7 - b = 2.5 x - 2 x

Or, 7 - b = . 5 x

∵ intersecting points are x , y = - 6 , - 5

putting the value of y from points

i.e 7 - b = . 5 × ( - 6 )

Or, 7 - b = 3

Or, b = 7 - 3

∴  b = 4

So, The value of b = 4

Hence, The value of b for the intersection of two lines at given points is 4 Answer

Final answer:

Using substitution, we solve the equation 6x + 6y = 0 for y, yielding y = -x. Substituting into -7x + 2y = 18 and solving for x gives x = -2. Substituting x back into y = -x, we find y = 2.

Explanation:

To solve the system of equations using substitution, we can isolate one variable in one equation and then substitute it into the other equation. In this case, we've been given the system:

-7x + 2y = 18

6x + 6y = 0

From the second equation, we can isolate y:

6x + 6y = 0

x + y = 0

y = -x

Now, substitute y = -x into the first equation:

-7x + 2(-x) = 18

-7x - 2x = 18

-9x = 18

x = -2

Now that we have the value for x, we can substitute it back into y = -x to find y:

y = -(-2)

y = 2

The solution to the system is x = -2 and y = 2.

The value of [tex]f(x+2)=2.1x+2.5[/tex]

Step-by-step explanation:

Given: The function [tex]f(x)=2.1x-1.7[/tex]

Using this formula, we need to find the value of [tex]f(x+2)[/tex]

Hence, we need to substitute [tex]x[/tex] by [tex]x+2[/tex] to find the value of [tex]f(x+2)[/tex]

[tex]f(x+2)=2.1(x+2)-1.7[/tex]

Multiplying the term [tex](x+2)[/tex] by [tex]2.1[/tex], we get,

[tex]f(x+2)=2.1x+4.2-1.7[/tex]

Adding the constant term,

[tex]f(x+2)=2.1x+2.5[/tex]

Thus, the value of [tex]f(x+2)[/tex] is [tex]f(x+2)=2.1x+2.5[/tex]

Answer:

R= {-7,-2}

Step-by-step explanation:

Answer:

x^2+9x+14=0

x^2+7x+2x+14=0

x(x+7)+2(x+7)=0

(x+7)(x+2)=0

x+7=0

x+2=0

X=-7

x=-2

The circumference of the vase is 18.84 inches.

Step-by-step explanation:

The circumference of the cylinder is same as the circumference of its base.

Moreover, the base of the cylinder is actually a circle.

So we need to find the circumference of the circle to find the circumference of the cylinder.

From the given figure, we know that the diameter of the base d= 6 inches.

∴The formula for the circumference of the circle = 2πr or dπ.

⇒ circumference = 6×3.14.

                             = 18.84.

So the circumference of the circle is 18.84 inches.

∴The circumference of the cylindrical vase is also 18.84 inches.