Mathematics Middle School

(9r-5)-(-4r+9)
[tex](9r - 5) - ( - 4 + 9) [/tex]

Answers

Answer 1
The first step for solving this expression is to remove the first set of parenthesis.
9r - 5 - (-4 + 9)
In order to find the sum inside the parenthesis we must keep the sign of the number with the larger absolute value and subtract the smaller absolute value from the larger. This will look like the following:
+ (9 - 4)
Now subtract the numbers and add it back into the expression.
9r - 5 - 5
Now we will calculate the difference between -5 - 5 and add it back into the expression.
9r - 10
Since we cannot simplify this any further,, 9r - 10 is going to be the correct answer to your question.
Let me know if you have any further questions.
:)

Related Questions

Use the net to find the approximate surface area of the cylinder to the nearest square meter

Answers

302m^2 is the answer.

Answer:

[tex]\text{Surface area of cylinder is }302\thinspace m^2[/tex]    

Step-by-step explanation:

Given the cylinder with radius 3 m and height 13 m. we have to find the surface area of the cylinder to the nearest square meter.

Radius=3 m

Height=13 m

[tex]\text{Surface area of cylinder is }\\\\=2\pi r(r+h)\\\\=2\times\frac{22}{7}\times3(3+13)\\\\=\frac{132}{7}(16)=301,71\sim302\thinspace m^2[/tex]

[tex]Hence,\text{surface area of cylinder is }302\thinspace m^2[/tex]  

Option 3 is correct.              

Plz jphelp me answer this year 7 question and explain how u got the answer.

Answers

The number in each block is the magnitude of the difference of the two numbers below it.

P = |17 -11| = 6 . . . . . selection B

Working from the bottom up, the empty boxes below Q are 16 -12 = 4, 10 -4 = 6. Then ...
Q = 7 -6 = 1 . . . . . selection A

A local coffee shop serves 2/9 as many customers as a shop run by a national coffee chain. The shop run by the chain serves 502 customers day. About how many customers does the local shop serve in a day

Answers

Answer:

about 112 customers

Step-by-step explanation:

we know that

To find out  how many customers does the local shop serve in a day, multiply the fraction 2/9 by the number of customers that the shop run serve in a day

Let

x ----> the number of customers that the shop run serve in a day

y ----> the number of customers that the local shop serve in a day

[tex]y=\frac{2}{9}x[/tex]

we have

x=502

substitute the value of x in the equation

[tex]y=\frac{2}{9}(502)[/tex]

[tex]y=111.6[/tex]

Round up

so

about 112 customers

The local shop serves about 112 customers in a day

Further explanation

Order of Operations in Mathematics follow this following rule :

ParenthesesExponentsMultiplication and DivisionAddition and Subtraction

This rule is known as the PEMDAS method.

In working on a mathematical problem, we first calculate operation that is in parentheses, follow by exponentiation, then multiplication or division, and finally addition or subtraction.

Let us tackle the problem.

[tex]\texttt{ }[/tex]

This problem is about Percentage.

A local coffee shop serves 2/9 as many customers as a shop run by a national coffee chain.

[tex]\texttt{Local Shop's customers} = \frac{2}{9} \times \texttt{National Chain's customers}[/tex]

[tex]\texttt{ }[/tex]

The shop run by the chain serves 502 customers day.

[tex]\texttt{National Chain's customers} = 502[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{Local Shop's customers} = \frac{2}{9} \times \texttt{National Chain's customers}[/tex]

[tex]\texttt{Local Shop's customers} = \frac{2}{9} \times 502[/tex]

[tex]\texttt{Local Shop's customers} = 111\frac{5}{9}[/tex]

[tex]\texttt{Local Shop's customers} \approx 112[/tex]

[tex]\texttt{ }[/tex]

Conclusion:

The local shop serves about 112 customers in a day

[tex]\texttt{ }[/tex]

Learn moreInfinite Number of Solutions : https://brainly.com/question/5450548System of Equations : https://brainly.com/question/1995493System of Linear equations : https://brainly.com/question/3291576

Answer details

Grade: Middle School

Subject: Mathematics

Chapter: Percentage

Keywords: Linear , Equations , 1 , Variable , Line , Gradient , Point , Multiplication , Division , Exponent , PEMDAS , percentange , percent

how many square feet is 20 ft by 20 ft

Answers

To find out how many square feet 20 feet by 20 feet is, we have to multiply the two quantities. Since 20 * 20 = 400, and feet * feet = feet², 20 feet * 20 feet is 400 feet².


75 points
Write and solve an equation to find the measure of ∠NEP. Make sure you show all work.

Answers

Answer:

Angle NEM = 110 degrees


Here's how:

Observe in the figure that Angle NEM = 70 degrees

Angle NEM = straight line,

Therefore:

180 - 70 = 110 

The answer is:

Angle NEM = 110 degrees 

Note that Angle PEQ in the figure is seventy (70) degrees based on what we call "vertical angles theorem" that proves Angle NEM  to be equal to our answer 110 degrees since NEQ is 180 degrees.

Answer:

your anser is 110

Step-by-step explanation:

180 - 70 = 110

The result of rounding the whole number 724,804 to the nearest thousands place is:

Answers

that would be  725,000  because of the 8 in the  hundreds place
725,000 , the 8 is in the hundreds place.

How does the zero product property help you find the x intercept of y=x^2-x-12?

Answers

We first factor this quadratic.  We want factors of c, -12, that sum to b, -1; -4(3) = -12 and -4+3 = -1, so those are the two we will use:
y=(x-4)(x+3)

The zero product property tells us that in order to get a product of zero, one of the factors must be zero.  This means either x-4=0 or x+3=0.  We solve both of these equations to find the roots, or x-intercepts:
x-4=0
x-4+4=0+4
x=4

x+3=0
x+3-3=0-3
x=-3

two softball players are comparing the throwing distance representing by HSN PF how many feet longer is HF then PF round your answer to the nearest whole number

Answers

Did u find the answer ??? I need it

What does the phrase “at the eleventh hour” mean in this sentence
The members of the House of Representatives approved the budget “ at the eleventh hour”
A) at a particular time of day
B) with unanimous agreement
C) before they needed to
D) at the last minute

Answers

Answer:um

Step-by-step explanation:d

Find the area. The figure is not drawn to scale

Answers

the correct answer is 15.51

Eva is jumping on a trampoline. Her height h at time t can be modeled by the equation h=-16t^2+20t+6. Would Eva reach a height of 14 feet?

Answers

Given the equation modeling Eva's height at time,t. To evaluate if she will reach height of 14 ft, we evaluate maximum height that she will reach.
At maximum height h'(t)=0
but
h(t)=-16t^2+20t+6
h'(t)=-32t+20=0
solving for t we get:
-32t=-20
t=20/32
t=5/8
thus the maximum height reached was:
h(5/8)=-16(5/8)^2+20(5/8)+6
h(5/8)=12.25 ft
Thus we conclude that she won't reach the height of 14 ft because her maximum height was 12.25 ft

A function assigns the value of each element of one set to the other specific element of another set. Eva can not reach a height of 14 feet.

What is a Function?

A function assigns the value of each element of one set to the other specific element of another set.

As the function of the height of the jump, Eva is given as h=-16t^2+20t+6. Now, in order to know if Eva will reach 14 feet height, we need to substitute the value of her height of Eva as 14 feet, therefore,

[tex]h=-16t^2+20t+6\\\\14=-16t^2+20t+6\\\\16t^2 - 20t+14-6=0\\\\16t^2 -20t + 8=0[/tex]

If we calculate the discriminant of the given quadratic equation, we will understand that the given quadratic equation has imaginary roots.

Therefore, Eva can not reach a height of 14 feet.

Learn more about Function:

https://brainly.com/question/5245372

Please help me with this.

Answers

Answer:

2(6x - 1 + 3x + 2) = 2(9x + 1) = 18x + 2

A standard number cube with the numbers 1 through 6 is rolled. Find the probability of rolling a number greater than 5 .

1. 1 / 6
2. 1 / 3
3. 1 / 4
4. 2 / 3

Answers

Hello!

To find the probability you put the amount of favorable outcomes over the total amount of outcomes

The cube has numbers 1 - 6 on it

Only 1 number is greater than 5 (6)

That gives us 1 favorable outcome and 6 total outcomes

The answer is A) 1/6

Hope this helps!

The probability of rolling a number greater than 5 is 1/6.

What is probability?

Probability is the ratio that shows the likelihood an event will occur or not from a given set of events.

We can find the probability of rolling a number greater than 5 below:

The total number of faces that have a number greater than 5 = 6.

The total number of faces = 6.

Therefore, the probability of that can be found as shown below:

P( rolling a number greater than 5 ) = The total number of faces that have a number greater than 5/The total number of faces

= 1/6

We have found the probability.

Therefore, we have found that the probability of rolling a number greater than 5 is 1/6.

Learn more about probability here: https://brainly.com/question/251701

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I have to use the distributive property to rewrite each algebraic ez
xpression i need answers please?1?1 3 (× + 1) =____?, 5(× + 8) =____?, 4 (× + 6) =___?

Answers

They would be: 3(x+1) = 3x+3,  5(x+ 8) = 5x+40, 4 (x + 6) = 4x+24. You just have to multiply the numbers in the brackets individually by the number that comes before the brackets.

-61/12=b-4/3 help me out please

Answers

-61/12= b - 4/3
add 4/3 to both sides

-61/12 + 4/3= b
convert 4/3 to like denominator; 3 goes into 12 four times and 4*4= 16/12

-61/12 + 16/12= b
combine numerators

(-61 + 16)/12= b

-45/12= b
simplify by 3

-15/4= b


ANSWER: -15/4= b

Hope this helps! :)
(27/7) = b

See attached for work

Two people start walking at the same time in the same direction. One person walks at 8 mph and the other person walks at 2 mph. In how many hours will they be 4.5 miles apart?

Answers

time = distance/speed

The distance between the walkers increases at the rate of (8 mph) -(2 mph) = 6 mph. That distance will be 4.5 mi after ...
  (4.5 mi)/(6 mi/h) = 4.5/6 h = 3/4 h

In 3/4 hour they will be 4.5 miles apart.

Final answer:

Two people walking at 8 mph and 2 mph, respectively, will be 4.5 miles apart in 0.75 hours, or 45 minutes, because they are moving apart at a relative speed of 6 mph.

Explanation:

To calculate the time it will take for two people walking at different speeds to be 4.5 miles apart, we need to find the relative speed at which they are moving apart. The first person walks at 8 miles per hour (mph), and the second person walks at 2 mph. The relative speed is the difference in their speeds, which is 6 mph (8 mph - 2 mph).

We know that they want to be 4.5 miles apart. To find the time (t), we use the formula distance = speed × time, or rearranged to solve for time, time = distance / speed. Plugging in our values we get time = 4.5 miles / 6 mph, which simplifies to 0.75 hours. Therefore, it will take them 0.75 hours or 45 minutes to be 4.5 miles apart.

A round of table has a diameter of 28 inches. What is the area of the tabletop? Use 22/7 for pi

Answers

Radius = Diameter ÷ 2 = 28 ÷ 2 = 14 inches

Area = π r² = 22/7 x (14)² = 616 in²


Answer: 616 in²
A = πr2
1936 or 616
Probably 616 though




The area of a square quilt is 196 square inches. There is a smaller square patch on the quilt with an area of 49 square inches. What is the difference between the overall perimeter of the quilt and the perimeter of the smaller square patch?

Answers





To find your answer you would find the perimeter of the small square which is 28.

You would then find the perimeter of the big square which is 56. 

Next, you subtract 56 from 28 and get 28.  

So the difference is 28 inches.

Hope this helps!!



First find the length of one side of the quilt and patch. In this case you just need to calculate square roots of 196 and 49. 
So the length of one side of the quilt is: √196=14.
The length of one side of the patch is: √49=7.
Last step is to find the difference of perimeter of quilt and the patch: 14×4-7×4=28.
So, here we go, your final answer for this problem should be 28!

State which of the following ordered pairs is a function.


Set A: (-1, 0), (-2, 1), (4, 3), (3, 4)

Set B: (1, 4), (2, 3), (3, 2), (4, 1)

Set C: (2, 1), (3, 2), (2, 3), (1, 4)

a. Set A

b. Set B

c. Both Set A and Set B

d. Set C

Answers

the answer is c, you see if the first number repeats

Answer:

c

Step-by-step explanation:

A plumber charged $78 for 4 hours' work. What is his rate per hour?

Answers

$19.50 an hour. $78/4 hours is 19.5
19.50 dollars per hour. Divide 78 by 4. You will get 19 add a decimal and add a 0 to the remainder of 2. You will get 19.5

linda is building a rectangular playhouse. the width is x feet. the length is x + 3 the distance around the base of the playhouse is 36 feet. is 8 the value of x? explain

Answers

The value of x is 7.5, not 8. Hence, 8 is not the correct value of x.

What is the value of x?

The perimeter of a rectangle is expressed as:

Perimeter = 2( length + width )

Given that:
The width of the rectangular playhouse = x feet

The length = x + 3

Perimeter = 36 feet

To determine whether 8 is the value of x, we can set up an equation using the formula for the perimeter of a rectangle.

Perimeter = 2( length + width )

Plug in the given values:

36 = 2( (x+3) + x )

Solve for x:

36 = 2( 2x + 3 )

36 = 4x + 6

4x = 36 - 6

4x = 30

x = 30/4

x = 7.5

Based on the calculation, the value of x is 7.5, not 8.

Learn about area of rectangle here: brainly.com/question/12019874

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Ronaldo tossed a quarter and three dimes at the same time. The quarter landed heads up what is the probability that all the dimes also laded heads up

Answers

I think 1/3 correct me someone if i'm wrong if i am srry

(5 points)

Points A and B are two of the vertices of a right triangle. They are the endpoints of the hypotenuse AB¯¯¯¯¯ of the triangle. The third vertex of the triangle lies in the first quadrant.

Plot a point at the location of the third vertex.

Answers

2,-2 because it goes by the coordinate x,y.

If I have a 40 % and my teacher puts in 3 100% what’s my grade ?

Answers

It would be an A if i'm correct.
Your grade would be an 85%. The way you do the math is to add the 3 100% together to get 300%. Then you would add the 40% to the 300% to get 340%. After, you would divide that percentage by four since you added only four numbers. When you divided, you would get 85%.

leah is placing books on a one meter long shelf. If each book is 2 cm wide, how many books will fit on the shelf?

Answers

1 m = 100 cm

1 book = 2cm wide.

Number of books = 100 ÷ 2 = 50 books.

Answer: 50 books can fit on the shelf.

A rectangular cake has a length of 13 1/2 inches and a width of 9 inches. How many whole, square pieces of cake with side lengths of 2 1/4 inches can be cut from the cake?

Answers

Let’s find the area of the rectangular cake and the square pieces.
I’m going to turn the fractions into decimals since it’s easier for me.
13.5•9
121.5
Now find the area of the square pieces.
2.25•2.25
5.0625
Now divide the area of the cake by the pieces to find how many can fit.
121.5/5.0625
24
So, 24 square pieces can be cut out of the rectangular cake.

If a = 0.3 with a line over 3 and b = 0.5 with a line over 5, what is the value of a + b?

8/10
8/9
88/100
80/99

Answers

8/10 is the answer i think I"m right  Because 0.3+0.5=0.8 so 8/10=0.8 so that's why i think 8/10 is the answer.

a = 0.3 recursive = 3/9

b = 0.5 recursive = 5/9

a + b  = 3/9 + 5/9 = 8/9

Answer: 8/9

??????????????????????????????????

Answers

Yermin is the closest answer
Yermin is the closest one

Suppose there is a relationship between independent and dependent variables represented by a scatterplot. Which statement is correct? The independent variable influences change in the dependent variable only if the points on the scatterplot go up from left to right. The independent variable influences change in the dependent variable whether the points on the scatterplot go up or down from left to right. The dependent variable influences change in the independent variable only if the points on the scatterplot go up from left to right. The dependent variable influences change in the independent variable whether the points on the scatterplot go up or down from left to right. Mark this and return

Answers

Answer:

B: The independent variable influences change in the dependent variable whether the points on the scatterplot go up or down from left to right.

Step-by-step explanation:

edg2021

dependent means it depends on something, such as the independent variable that will change it

The independent variable influences the dependent variable in a scatterplot regardless of whether the relationship is positive (upward slope) or negative (downward slope), which is shown by the direction in which the points trend.

The correct statement is: The independent variable influences change in the dependent variable whether the points on the scatterplot go up or down from left to right. This means that the independent variable can have either a positive relationship or a negative relationship with the dependent variable. If there is a positive relationship, as the independent variable increases, the dependent variable also increases and vice versa. Conversely, in a negative relationship, as the independent variable increases, the dependent variable decreases, and as the independent variable decreases, the dependent variable increases. A scatterplot is a tool that helps visualize these relationships, with the independent variable typically plotted on the horizontal axis and the dependent variable on the vertical axis. The slope of the points in a scatterplot indicates the direction of the relationship, which can be assessed by observing whether most points lie around a line that slopes upwards or downwards.

If you squeeze one orange you would get 4 ounces of juice do you want does make 32 ounces of juice how many oranges much you squeeze

Answers

Hello there, and thank you for posting your question here on brainly.

Short answer: 8 oranges.

Why?

You can find the answer to this by dividing 32 by 4. What is 32 divided by 4? 8. (32 / 4 ==> 8)

Hope this helped you! ♥
the number of oranges is 8:
x = number of oranges
1/4=x/32
x=32/4=8 oranges
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