Simplify the numerical expression: -4.2 + 8.1 x ( -1.9)

Answers

Answer 1
-19.59 is your answer because u do PEMDAS and that would be 8.1*(-1.9) which gives you -15.39 Then you do -4.2+-15.39 and you would get -19.59

Related Questions

The cost C (in dollars) for the care and maintenance of a horse and carriage is C=15x+2000 where x is the number of rides.

Rides cost 35$

A: write an equation for the revenue R in terms of the number of rides

B: How many rides are needed to break even.

Need help with both parts

Answers

Answer: 100 rides are needed to break even.


Step-by-step explanation:

We have given the cost function

C(x)=15x+2000 where x is the number of rides.

And rides cost 35$

⇒ revenue function would be 35 times x

i.e.R(x)=35 x , where x is the number of rides.

Break even point of a firm occurs when at a certain point x the total cost equals to the total revenue.

i.e. at break even point

total revenue=total cost

⇒35x=15x+2000

⇒35-15x=2000[subtract 15x from both sides]

⇒20x=2000 [simplify]

⇒x=2000/20[dividing both sides with 20]

⇒x=100

∴ 100  rides are needed to break even.

The revenue function will be 35x and the breakeven point will be 100 rides.

From the information given, the revenue function will be calculated by multiplying the price by the quantity. This will be:

= 35 × x

= 35x

The breakeven point will be the point where total revenue equals the total cost. This will be:

35x = 15x + 2000

35x - 15x = 2000

20x = 2000

x = 2000/20

x = 100

Therefore, the revenue function will be 35x and the breakeven point will be 100 rides.

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At the local grocery store, lemons are 52 cents each each and lines are 21 cents each . How many lemons and limes can you but for exactly $3.75.

Answers

6 lemons and 3 limes
Because 6 x $0.52 = $3.12
and
3 x $0.21 = $0.63
So when you add them up you get exactly $3.15

Hope I helped

Please make me brainliest

Relationship A has a greater rate than Relationship B. This table represents Relationship B.

Hours worked     2      4    5           8
Amount paid ($) 25    50  62.50   100

Which equation could represent Relationship A? Hours worked is represented by x and Amount paid is represented by y. Select each correct answer

a] y = 12.25xb] y = 13x
c] y = 12.75xd] y = 11.5x

Answers

the answer is a y=12.25x

Answer:

12.75 and 13x

Step-by-step explanation:

took the test (k12)

Apply the definition of subtraction and properties of operations to find the result. (3/2 + 2/3) - 3/8

Answers

what is the attachment 

The prefix (deci-, centi-, or deca-) tells you to multiply by 0.1. Which one is it?

Answers

Deci is .1
Deca is 10
Centi is .01

what the answer ?????

Answers

a^2 + b^2 = c^2

3^2 +b^2 = 5^2

9 + b^2 = 25

b^2 = 16

b = sqrt(16)

b=4

A farmer had 1,000 horses and cows. After selling some of them, he had 550 horses and 350 cows left. How many horses and cows did he sell altogether?

Answers

Answer:

he sold 450 horses and 650 cows

Step-by-step explanation:

number of horses he sell =total horses - sold horses

number of cows he sell = total cows- sold cows

Mary Stevens earns $6 an hour at her job and is entitled to time-and-a-half for overtime and double time on holidays. Last week she worked 40 hours of regular time, 61/2 hours of overtime, and 8 hours of holiday time. How much did she earn?

Answers

Multiply the hours buy her hourly pay:

6 × 40 = 240

6 × 6.5 = 39

6 × 8 = 48

Add them together:

240 + 39 + 48 = 327


ANSWER: Mary Stevens made $327.


I really hope this helped you! c:

Which word sentence represents the equation?



6(x + 3) = 42



A. The sum of 3 and six times some number is 42.

B. Three plus 3 times some number is 42.

C. Six times some number plus 3 is 42.

D. Six times the sum of a number and 3 is 42.

Answers

Final answer:

The word sentence that represents the equation 6(x + 3) = 42 is option A: The sum of 3 and six times some number is 42.

Explanation:

The word sentence that represents the equation 6(x + 3) = 42 is option A. The sum of 3 and six times some number is 42.

To understand why, let's break down the equation step-by-step:

We have the expression (x + 3) in parentheses, which means that whatever number the student chooses to replace x with should be added to 3.Next, we multiply the entire expression (x + 3) by 6.The result of that multiplication should equal 42.

So, option A correctly expresses the equation by stating that the sum of 3 and six times some number is 42.

Which of the following is equivalent to 3^4?

A) 7
B) 12
C) 64
D) 81

Answers

3^4 = 3 x 3 x 3 x 3

3 x 3 = 9
3 x 3 = 9
9 x 9 = 81

81 is your answer

hope this helps

3^4 = 3x3x3x3 = 81

 Answer is D) 81

What would x equal? Please help

Answers

23*2 = 46

5x-4 =46

5x = 50

x = 50/5 = 10

x = 10

How do I use 2.81 + 3.72 in benchmark to estimate this problem showing all work

Answers

   2.81
+3.72
______
6.53

BENCHMARKED=6.5

10 points
What is an irrational number between 7.7 and 7.9?

and no, 7.8 is not irrational.

Answers

Alright, so what you do is take an irrational number, like π, and get it between 7.7 and 7.9. How? For example, if you wanted to get π between 10 and 10.1, we know that π is 3.14 something. If we added 6.9 to it,we'd have 10.04 something. Since the numbers after that 1, 0, and 0 are not changed, this is still irrational as you can still not represent π with integers. For example, if we had π/1, we can add 5/1 to it and we'd have (π+5)/1, which can be separated into π/1+5/1 - a irrational number added to a rational number is not rational (The proof for this can be learned in calculus). Good luck, and feel free to ask with further questions!

Solve for s.



2/3s+5/6s=21



Enter the answer, as a whole number or as a fraction in simplest form, in the box.
s =

Answers

2/3s+5/6s=21
If you do the problem without the variable the equation equals 1.5.
After I did that I divided 21 with 1.5 then it had come to a total of 14.
After that I decided to plug in 14 in the equation and the total came out to be 21.So s =14
Final answer:

To solve the equation 2/3s + 5/6s = 21, you first combine the fraction terms into 1.5s = 21, then solve for s by dividing both sides of the equation by 1.5, giving you s = 14.

Explanation:

To solve for s, you need to first combine like terms on the left-hand side of the equation 2/3s + 5/6s = 21.

To add these fractions, you first need to find a common denominator, which is 6 in this case. So, the equation becomes 4/6s + 5/6s = 21, which simplifies to 9/6s = 21 or 1.5s = 21.

Now you can solve for s by dividing both sides of the equation by 1.5, resulting in s = 21 / 1.5.

So, the solution for s is 14, which can be entered as a whole number.


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the pressure exerted on the floor by the heel of someone's shoe is inversely proportional to the square of the width of the heel of their shoe. When Megumi wears 2cm wide heels, she exerts a pressure of 400 kPa. Determine a function to represent the pressure, p, exerted by Megumi if she wears heels of width, w.

Answers

P = k/w^2 

first of all you need to find k 
But I kind of don't like the units of each value so let say 
400KPa = 4 * 10^5 Pa = 4 * 10^5 N/m^2 
2 cm = 2 * 10^-2 m 

input values in the equation 

4*10^5 = k/(4*10^-4) >>> k = 160 N 

P = 160/w^2 
it said if she wears a heel with a width of .5 cm 

P = 160(0.5 * 10^-2)^2 >>> P = 6400 KPa

A rug maker is using a pattern that is a rectangle with a length of 96 inches and a width of 60 inches. The rug maker wants to increase each dimension by a different amount. Let l and w be the increases in inches and the length and width. Write and simplify an expression for the perimeter of the new pattern.

Answers

Increasing the length by [tex]l[/tex] we have the new expression for the length as [tex]96+l[/tex]

Increasing the width by [tex]w[/tex], we have the new expression for the width as [tex]60+w[/tex]

Perimeter of a rectangle is given by adding all the sides, so we have

[tex]P = 96 + l+96+l+60+w+60+w[/tex]
[tex]P=192+2l+120+2w[/tex]
[tex]P = 312+2l+2w[/tex]

Which of the following correctly shows the distributive property?
A. 4(x + 5) = x + (4)(5)
B. 4(x + 5) = (4)(x) + 5
C. 4(x + 5) = 5(x + 4)
D. 4(x + 5) = (4)(x) + (4)(5)

Answers

Answer:

D. 4(x + 5) = (4)(x) + (4)(5)

Step-by-step explanation:

The distributive property: a(b + c) = ab + ac

What is 6×2 49÷7 +5=

Answers

(6 x 2)( 49/7) + 5 = 
(12)(7) + 5 = 
84 + 5 = 
89


89 is your answer

hope this helps
89 would be your answer.

Hope this helps! :)

Find the x-intercept of the line:

-4x - 2y = 16

Question 6 options:

a) (-4,0)
b) (4,0)
c) (0,8)
d) (0.-8)

Answers

The x intercept is a. (-4,0)
The answer is a) (-4,0)

Which statement is not true about similar triangles? Corresponding angles are equal. Each triangle has 3 sides. The lengths of corresponding sides are proportional Corresponding sides are congruent.

Answers

The lengths of corresponding side are propotional

Corresponding sides are congruent is not the correct answer here.

What is a similar and congruent triangle ?

Similar triangles has same corresponding angles and the corresponding sides are in proportion and for the congruent triangles the corresponding angles and the corresponding sides are same.

Two triangles is similar if their corresponding angles are congruent and their corresponding sides are in equal proportion.

We can can think of a triangle having x°,  y°,  z° as it's interior angle and for the other triangle to be similar it must also have x°,  y°,  z° as it's interior angle and the first triangle has length of the 3 sides equal to some values the other triangle to be similar it's side must have values in the same multiples of the previous values of the first triangle.

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-8(5v-x-5)

use the distributive property to remove the parentheses

pls help!

Answers

-8(5v - x - 5) =
-40v + 8x + 40 <==

** u r basically multiplying that -8 by every term in the parenthesis...
(-8 * 5v) + (-8 * -x) + (-8 * -5) = 
-40v + 8x + 40
Hi there!

The Distributive Property allows us to multiply the term outside of the parenthesis by all terms inside of the parenthesis.

Here’s an example;
2(1 + 3)
2(1) + 2(3)
2 + 6
8.

Hopefully this example and explanation has helped you understand the concept of using the Distributive Property.

Now, let’s apply this to our current expression.

-8(5v - x - 5)

Remember that when you multiply a negative by a positive, the product remains negative. When you multiply a negative by a negative, the product is positive.

-8(5v - x - 5)
-8(5v) = -40v
-8(-x) = 8x
-8(-5) = 40

Our product is:
-40v + 8x + 40

I hope this helps!

Simplify.

12.13 - 3.2 × 2.3 + 0.5^2

Answers

El resultado es 251/50= 5.02
The answer is 5.02. Here is the work shown

I NEED HELP FAST! PLEASE!
Carson was building a greenhouse. He has a board that is 6 1/3 ft long. He’s needs the board to measure 5 1/6 fr. how much will he need to cut off of the board?

Answers

6 1/3-5 1/6=6 2/6-5 1/6= 1 1/6. Hope this helps!

Simplify (4/7) divided by (3/-8)

Answers

So you want to flip 3/-8. So your equation should be 4/7 • -8/3. Since when dividing a fraction you have to change the second fraction as well as the divide sign to multiply. “Keep (4/7) change (divide sign) flip (second fraction” now all you have to do is multiply! Hopefully that helped.

it would be -32/21 because if you multiple 4/7 -8/3 it would be -32/21  

Ahmad drove 638 miles in 11 hours. At the same rate, how long would it take him to drive 522 miles?

Answers

696 miles          522 miles----------------  =  --------------- 12 hours            x hours Cross multiply: 696x = 522*12 x = 522*12/696 Solve for x

if 4 apples cost $3.04 how much does just one cost

Answers

the answer for this is: $0.76
If 4 apples cost $3.04, than one apple would cost .76 cents. 

So, we can assume all of the apples are the same price right? It doesn't matter about size or color because the problem doesn't tell us that. So, we can conclude one apple is the same prices as another.

Well, to figure out how much one apple costs, we can divide 3.04 by 4. This is because we have 4 apples so we can take that price of the 4 apples total and divide it by haw many apples the problem gives us.

So, 3.04 / 4 = .76

Hope this helped!
 

Jay Downs only worked 15 of his scheduled hours last week. If he worked 75% of his scheduled hours, how many hours was he scheduled to work?

Answers

divide 15 hours by 75%

15 / 0.75 = 20

he was scheduled for 20 hours

You need to divide the 15 hours by the 75% 15 / 0.75 = 20 so Jay Downs was scheduled to work 20 hours

which letters have rotational symmetry ? answers : W , K, Y , O , P , Z

Answers

O definitely does. I think Z and W do as well.

Y, K and P don't because they can't be rotated and map onto themselves.

Describe why it might not be a good idea to use a key where each symbol stands for 1 in a picture graph

Answers

Final answer:

It is inefficient to use a key where each symbol represents the value 1 in a picture graph because it can make the graph cluttered and hard to interpret, especially with large data sets. Picture graphs should simplify visualization of data, yet remain clear and easily comprehensible.

Explanation:

Using a key where each symbol stands for 1 in a picture graph might not be a good idea because picture graphs are meant to represent larger sets of data visually and efficiently. If each symbol represents only 1, the graph could quickly become cluttered and hard to read, especially if the data set is large. This defeats the purpose of a picture graph, which is to provide a clear and simplified visual representation of the data. Moreover, the choice of symbols in a mathematical context is arbitrary; they are placeholders that have no intrinsic significance, and what matters is the concept they represent.

For instance, when dealing with large quantities, using symbols that represent 10, 100, or any other convenient large number makes the graph much more readable and helps to emphasize important relationships and comparisons between different data sets. Similarly, when using equations, symbols are used as stand-ins for numbers, and changing a symbol does not affect the underlying relationship they represent. Introducing more effective representations pictures the concept that equations capture. Likewise, the practicality of picture graphs can be compared to other types of graphs, like pie graphs, bar graphs, and line graphs, each of which serves a different purpose and has its own best use scenario.

Final answer:

Using a key where each symbol stands for 1 in a picture graph can make it cluttered and confusing, especially for large data sets. It is advisable to use symbols to represent larger values or to choose different types of graphs for readability and clear communication of the data's relationships.

Explanation:

Using a key where each symbol stands for 1 in a picture graph could be inadvisable in some situations. For large quantities, having one symbol represent a single unit could make the graph cluttered and difficult to read. It is more effective to have symbols represent larger, rounded values so the graph remains clear and interpretable. The use of symbols in mathematics and graphs is generally arbitrary, and they can be chosen to best represent the data being visualized. For example, in equations or graphs illustrating one-dimensional kinematics, symbols are chosen to present information on position, velocity, and acceleration over time in a way that makes relationships between these physical quantities easily understandable.



When considering how to best display data, it's crucial to think about readability and the ease of extracting useful information from the graph. If a picture graph with one symbol representing 1 becomes too complex, it might be better to opt for other types of graphs like bar graphs or line graphs, depending on the data's characteristics. Furthermore, the real purpose of graphs is to capture and represent relationships or trends, which is often better achieved with symbols that represent more suitable quantities, especially when dealing with large numbers.



The glossary of key symbols and notation in mathematics reaffirms the concept that the symbols themselves are not inherently meaningful, but are placeholders to facilitate understanding of the relationships and quantities they represent. Therefore, when creating picture graphs, the key chosen should enhance the viewer's ability to quickly grasp the depicted information.

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Estimate the amount of the tip by rounding the bill to the nearest dollar before calculating.

15% tip on a bill of $46.62

The amount of the tip is approximately...?

Answers

Hello there! 46.62 rounded to the nearest dollar is 47. That's because the tenths digit is greater than 5, so we round up from 6 to 7. The new number is 47. Now, we can multiply by 15% to find the approximate amount of the tip, because that will get us to 15% of the amount. 47 * 15% (0.15) is 7.05. The amount of the tip is approximately $7.05.
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