Mathematics Middle School

Round each addend to the nearest tenth and find the sum.
2.08 + 1.772 + 9.125
12.8
12.9
13.0
13.1

Answers

Answer 1
2.1+1.78+9.1
The answer is 12.98 but rounded it is 13.0
Answer 2

Answer:

It's 13.0

Step-by-step explanation:

Related Questions

The perimeter of a rectangle is 80x. The base is two times the height. In terms of x, what are the dimensions of the rectangle?
a.
h = 10x; b = 10x
c.
h = 10.3x, b = 20.6x
b.
h = 13.3x; b = 26.6x
d.
h = 5x; b = 25x

Answers

By definition we have that the perimeter of a rectangle is given by:
 P = 2b + 2h
 Where,
 b: base
 h: height
 Also, as a data of the problem we have:
 base is two times the height:
 b = 2h
 Substituting we have:
 P = 2 (2h) + 2h
 Clearing h:
 6h = P
 h = P / 6
 h = (80x) / 6
 h = (40/3) x
 The base will be
 b = 2h
 b = (80/3) x
 Answer:
 the dimensions of the rectangle are
 b = (80/3) x
 h = (40/3) x
 b. h = 13.3x; b = 26.6x
Answer:
h = 13.3x; b = 26.6x

Explanation:
Perimeter of the rectangle = 2(base+height)
80x = 2(base+height)
base + height = 40x ........> I

Now, we are given that the base is 2 times the height, this means that:
base = 2*height ..........> II

Substitute with II in I:
base + height = 40x
2*height + height = 40x
3*height = 40x
height = 13.3x 

Substitute with the height in equation II to get the base as follows:
base = 2*height 
base = 2 * 13.3x = 26.6x

Hope this helps :)

Need help with 3 and 4.

Answers

A) Problem 3

Answer: third option 11.5

Explanation:

1) Since this is a right triangle you can use the trigonometric ratios.

2) sin (α) = opposite-leg / hypotenuse

3) α = 35°; opposite-lge = x; hypotenuse = 20.

4) substitute values

sin(35°) = x / 20

5) Solve for x

x = 20 * sin (35°) = 11.47

6) Round to the nearest tenth: 11.5

Answer: third option 11.5

B) Problem 4

Answer: first option 8.3

Explanation:

1) Since it is a right triangle you can use trigonometric ratios

2) cos (α) = adjacent - leg / hypotenuse

3) α = 41°; adjacent - leg = x; hypotenuse = 11

4) Substitute values

cos (41°) = x / 11

5) Solve for x: x = 11 * cos (41°) = 8.30

6) Round to the nearest tenth: x = 8.3

Answer: 8.3

If a + 4b = 33 and 6a + 3b = 51, what is the value of a + b?

(I got 5 but it was wrong)

Answers

b = 7, a = 5. So a + b is 13.

Answer:

12

Step-by-step explanation:

Since the problem asks for $a+b$, we look for a way to isolate $a+b$ from the given equations.

Notice that $a + 6a = 7a$ and $4b + 3b = 7b$. This gives us the key to isolating $a + b$. We simply add the two equations together:\begin{align*}

7a + 7b &= 84 \\

7(a + b) &= 84 \\

a + b &= \frac{84}{7} \\

a + b &= \boxed{12}

\end{align*}

Michael’s grandmother made two pies for Thanksgiving, a sweet potato pie and a chocolate pie. Each pie had 8 slices. All of the sweet potato pie and 2 slices of the chocolate pie were eaten. How much pie did Michael’s family eat on Thanksgiving? A) 5 8 pie B) 10 16 pie C) 1 1 4 pies Eliminate D) 1 3 8 pies

Answers

Think it's B or A if they want it simplified.

What must be done before adding or subtracting fractions

Answers

any type of symbol is what need to be answered first
Find a common denominator.

Example: ¹⁄₂ + ²⁄₃

¹⁄₂(³⁄₃) + ²⁄₃(²⁄₂) (Let’s make it six)

³⁄₆ + ⁴⁄₆ = ⁷⁄₆ (Add now)

Here is a geometrical explanation for it. Imagine you have two pizzas. One pizza is bigger than the other. Both pizzas are cut into 8 equal slices. Is one of slice from the big pizza the same as one slice from the little pizza? Nope. The slice from the little pizza is smaller than the one from the big pizza. This is why you need a common denominator. One slice of the bigger pizza is not equal to one slice of the smaller pizza.

I hope this helps! Don’t hesitate to message me if you have any questions!

Dave walked a distance of 40 meters to the north. It took him 50 seconds. What was his velocity?

A. 1.25 m/s north
B. 5 m/s north
C. 4 m/s north
D. 0.8 m/s north

Answers

0.8m/s north because 40 divided by 50 equals 0.8 so your answer is 0.8

The hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. Forty-five copies of the book weigh a total of 249 ounces. Which value could replace x in the table?

Answers

Solving the system of linear equations, we found that there are 12 hardcover books and 33 paperback books, making the value that could replace 'x' is 12.

The question involves solving a system of linear equations to find the number of hardcover and paperback versions of a book that together weigh 249 ounces. Since the hardcover version weighs 7 ounces and the paperback weighs 5 ounces, we can create two equations based on the given information. If we let x represent the number of hardcover books and y represent the number of paperback books, the equations would be:

x + y = 45 (since there are 45 copies in total)

7x + 5y = 249 (since the total weight is 249 ounces)

Solving this system, we can multiply the first equation by 5, which gives us 5x + 5y = 225, and subtract this from the second equation to find the value of x. This yields 2x = 24, so x = 12. Therefore, there are 12 hardcover books and the rest are paperbacks. To find the number of paperbacks, we substitute x back into the first equation and get 12 + y = 45, which means y = 33. Hence, the number that could replace x in the table is 12.

Pepper’s dog pen measures 4 meters wide and has an area of 20 square meters. What is the perimeter of the pen in meters?

Answers

18. 4 x 5 = 20(area) so the other 2 sides that are not 4 are 5. 5+5+4+4=18

The graph below shows a line segment PQ:

Graph of line segment PQ with endpoints at negative 2 comma 1 and 4 comma 4

What is the slope of the line segment PQ?

−2
−1 over 2
1 over 2
2

Answers

The slope is the difference of y coordinates divided by the difference of x coordinates.
.. (1 -4)/(-2-4) = -3/-6 = 1/2

The 3rd selection is appropriate.

The absolute ______ of 2 is 2.
1.) absolute value
2.)sign
3.)opposite

Answers

The absolute value of 2 is 2
1.) Absolute value

Hope this helps

which relation is a function?

Answers

The last one is a function.

A function needs to have continuous data, meaning that all of the points need to be connnected, and it also needs to have no more than 2 x values with each y value.

Hope this helps!

2. PB and J Array Ken has made a selection of square jam sandwiches for party, which he arranges in a single layer on the table in perfect rectangle. Sarah has brought along the same number of square peanut butter sandwiches, which she puts out, also as a single layer, to form a border vA (one sandwich wide) around Ken's Given that all of the sandwiches are the same size and they are all used, how many sandwiches could each person possibly have made?

Answers

perimetre + 4 = area
Each person must have made 24 sandwiches.

Let's assume Ken arranged his sandwiches in a rectangular shape with length 'L' and width 'W'. Now Sarah arranged her sandwiches to form a border around Ken's rectangle. The solution diagram is attached below.

Ken needs as much sandwiches as area of rectangle i.e. number of Ken's sandwiches would be = LW.

It is clear that Sarah needs as much sandwiches as perimeter of rectangle and extra four sandwiches to put on corners. It means number of Sarah's sandwiches would be = 2·(L+W) + 4.

Given that all of the sandwiches are the same size and they are all used.

Ken and Sarah bought same number of sandwiches. So we need to solve the following equation :-

Number of Ken's sandwiches = Number of Sarah's sandwiches

LW = 2·(L+W) + 4

Using trial and error approach, we get 6 x 4 = 2 x (6 + 4) + 4.

So number of Ken's sandwiches would be LW = 6 x 4 = 24 sandwiches.

Hence, final answer is "Each person could have 24 sandwiches".

George has to pay $30 in taxes for every $100 that he earns .Last summer he earned $3,680. How much did he pay in taxes

Answers

3680:100=36,8
36,8×30=1104 
The taxi was spent $1104

if you pay $8.50 per square yard of carpeting,what is your total cost for 27.5 square yards?

Answers

your total cost is 233.75 because you do 8.50 times 27.5 
I think the answer is $233.75

What do I put? I am having so much trouble with this.

Answers

12. [tex] \frac{3}{4} , \frac{9}{12} [/tex]

13. [tex] \frac{4}{10} , \frac{4}{100} [/tex]

16. [tex] \frac{3}{9} [/tex] is already in simplest form.

How do I graph this ?

Answers

You you put the x section in the x axis and the y section in the y axis. So the straight line going across is the x axis and the line going up and down is the y axis. So for your first and (-5,2) you look for negative 5 on the x axis and 2 on the y axis since the x axis will always go first. Then you would put the dot where the numbers line meet. There’s your answer
Here you go! Hope this helps!!

Rick shared his bag of grapes with his friends. He gave 2/10 of the bag to Melissa and 4/10 of the bag to Ryan. What fraction of the bag of grapes does Rick have left?

Answers

Final answer:

After giving away 2/10 of his grapes to Melissa and 4/10 to Ryan, Rick has 4/10 of his bag of grapes left.

Explanation:

Rick gave away part of his bag of grapes to his friends: 2/10 to Melissa and 4/10 to Ryan. To find out what fraction of the bag he has left, we need to add together the fractions that he gave away and then subtract this from the whole bag, which is represented by the fraction 1 (or 10/10).

Rick gave away:
Melissa: 2/10
Ryan: 4/10
Total given away: 2/10 + 4/10 = 6/10

Fraction of the bag Rick has left:
1 (or 10/10) - 6/10 = 4/10

Therefore, Rick has 4/10 of the bag of grapes left after sharing with his friends.

Final answer:

To find out how much of the bag of grapes Rick has left, we need to subtract the fractions that he gave to Melissa and Ryan from 1. Rick has 2/5 of the bag of grapes left.

Explanation:

To find out how much of the bag of grapes Rick has left, we need to subtract the fractions that he gave to Melissa and Ryan from 1.

Given that Rick gave 2/10 of the bag to Melissa and 4/10 of the bag to Ryan, we can calculate the fraction of the bag he has left by subtracting these two fractions from 1:

1 - 2/10 - 4/10 = 1 - 6/10 = 4/10 = 2/5

Therefore, Rick has 2/5 of the bag of grapes left.

6TH GRADE MATH
someone please solve this

Answers

Since the amount of money earned is based of of the amount of pies he sells...

y = 14x

Hope this helps!
It would be set up like this:

x14=y or x times 14 = y

Its hard to type out due to X being the number of pies sold and x being used as the multiplication symbol.

But I hope this help!

Gracie read 150 pages of a book she got for her birthday the book is 227 pages long whats the right equation

Answers

Are there options or when is her birthday what is the rest of the problem

Can you tell me how to do this?

Answers

Add up the Like terms, then just do the math. Comment for Any questions

So 5.2x + 2.1x=
8-3=
Then rewrite the equation

morris rarely arrives home before 4:00 p.m. it is now 3:20 p.m. estimate the probability that morris will arrive home in the next 30 minutes

Answers

the answer is 1/60 or one out of 60

graph the line whose x-intercept is -8 and whose y-intercept is 9

Answers

In intercept form, the equation of the line is
.. x/-8 +y/9 = 1

The graph of the line whose y intercept is 8 and whose x intercept is 9 is given below.

What are intercepts?

The points where a line crosses an axis are known as the x-intercept and the y-intercept, respectively.

Given:

An intercept form of the standard line is,

x/a + y/b = 1, where a and b are x-intercept and y-intercept form of the line.

So, the equation is,

x/-8 + y/9 = 1

And the graph is given in the attached image.

Therefore, the graph is given.

To learn more about the intercepts;

https://brainly.com/question/14180189

#SPJ2

y-2y8y-6 is equivalent to:

Answers

the answer should be 1

Can someone help me please and thank you

Answers

Up, you add the number to the given equation; down, you subtract. To change the steepness, multiply x by the factor involved.

A) y = 3x -10

B) y = (1/2)x +4

C) y = x -1

Please help me I don't know this

Answers

Hey there! :D

Just plug in the values of x.

y= 1/2(-5)-2

y= -2.5-2

y=-4.5

First point: (-5, -4.5)

y= 1/2(-2)-2

y=-1-2

y=-3

Second point: (-2, -3)

y= 1/2(1)-2

y =.5-2

y=-1.5

Third point: (1,-1.5)

y= 1/2(3)-2

y= 1.5-2

y=-.5

Fourth point: (3, -0.5)

y= 1/2(6)-2

y=3-2

y=1 

Fifth point: (6,1)

I hope this helps!
~kaikers 

Two angles are complementary. If one angle measures 32 degrees, what is the measure of the second angle?
Select one:
A. 48 degrees
B. 148 degrees
C. 58 degrees
D. 68 degrees

Answers

Final answer:

Two angles are complementary if they add up to 90 degrees. If one angle measures 32 degrees, the other angle measures 58 degrees, which is found by subtracting 32 from 90.

Explanation:

The question is asking about complementary angles, which are two angles that add up to 90 degrees. If one angle measures 32 degrees, we can find the measure of the second angle by subtracting 32 degrees from 90 degrees since the two angles must sum to 90 degrees.

The calculation would be: 90 degrees - 32 degrees = 58 degrees.

Therefore, the measure of the second angle is 58 degrees, making the correct answer:

C. 58 degrees

What are three rational numbers between 0.2 and 0.3 (one must be a fraction)?

Answers

it would be 2/5 but the numbers between is 2/10 and 3/10
The answer will be 0.6 Hopes this helps. :)

Bill pays $49 for an item after it has been discounted 30%. What was the original price of the item?

Answers

If an item has been discounted 30%, then it is currently worth 70% of the original price. This tells us that $49 is 70% of the original price. Therefore, you need to divide $49 by 70% to get your answer (you have to work backwards; remember that you would have multiplied the original number by 0.7 to get 49):
49÷(70/100)= $70
Therefore, the price of the original product was $70

If you can buy one can of pineapple chunks for $2 then how many can you buy with $10

Answers

You can buy 5 cans with $10.

(did you see my pun?)

Hope this helps!
You can buy 5 cans with the $10

two attendants earn $6240 and $6220 per annum, respectively, exclusive of a bonus of $2640 per annum.
if both have a pension deduction of 20%,the difference in the pension deduction of the two attendants on a semimonthly basis is..........?

Answers

The difference in annual earnings is $6240 -6220 = $20. 20% of that is $4. There are 24 semi-months in a year, so the difference in amount deducted is about
.. $4/24 = $(1/6) ≈ $0.17

If the payroll department is paying attention, the difference in deducted amounts will be $0.16 2/3 over the year. Some paychecks, it will be $0.16, and others it will be $0.17.
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