Mathematics College

Maggie wants to buy a new energy­efficient refrigerator. Her old refrigerator uses about 1200 kWh per year,while the new one would use about 400 kWh per year. Approximately how much money would Maggie saveper year if she buys the new refrigerator?

Answers

Answer 1

Answer:

800 Kwh

Step-by-step explanation:

Answer 2

To solve this problem, we need to find the difference in energy saved and then multiply by the cost of 1kWh of electricity

How much did Maggie save?

Let's first of all calculate the the difference in energy saved

Data;

old refrigerator = 1200kWhnew refrigerator = 400kWh

[tex]1200 - 400 = 800kWh[/tex]

Maggie would've saved 800kWh in one year.

But since we were not given a standard cost of electricity, we would assume that 1kWh will cost $1.

So, to determine how much she must've saved, we simply multiply $1 by 800kWh

[tex]1 * 800 = $800[/tex]

Using our assumptions, she would've saved $800 in one year.

Learn more on rate of power here;

https://brainly.com/question/14878357

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Related Questions

Choose the correct simplification of (7x^3 – 4x - 8) + (2x^3 + 3x + 2).​

Answers

Answer:

9[tex]x^{3}[/tex]-x-6

Step-by-step explanation:

Answer:

=9x3−x−6

Step-by-step explanation:

7x3−4x−8+2x3+3x+2

PLEASE HELP ITS URGENT
DONT GUESS
WILL MARK BRAINLIEST

Answers

Answer:

5ft

Step-by-step explanation:

13ft -8ft = 5ft

What does |-7| equals ?

Answers

Answer:

7

Step-by-step explanation:

Answer:

the answer is 7

Step-by-step explanation:

when the lines are around it it means to find the value without a sign


Two websites sell the same type of headphones.
Website A
Website B
Cost of headphones
£49.95
£47.68
Cost of postage
£4.39
£6.95
Including the cost of postage which website is cheaper and by how much​

Answers

You would do the opposite so literally just x 49.95 by 6.95 and 47.68 by 4.39 so the answers are 347 and 209 so website B

what is a scale? in math

Answers

In math, a scale in graphs can be defined as the system of marks at fixed intervals, which define the relation between the units being used and their representation on the graph.
Here, for instance, the scale of the graph is 1 interval being equal to 10 units

In a marketplace, a box of peaches can be purchased for $77.95 per box. One box
contains 78 peaches. How much would you have to pay to buy 4 peaches?
(Hint: Convert 4 peaches into dollars.)
Round your answer to the nearest hundredth. Do not type the units ($) in the space
below.

Answers

Answer:

4

Step-by-step explanation:

This question can be solved by proportions, using rule of three.

We have that:

You buy 78 peaches for $77.95. How much you pay to buy 4 peaches?

78 peaches - $77.95

4 peaches - x

[tex]78x = 4*77.95[/tex]

[tex]x = \frac{4*77.95}{78}[/tex]

[tex]x = 4[/tex]

You pay $4 for 4 peaches.

I really need to know theese and rhe rest plsss

Answers

Answer:

10.45?

Step-by-step explanation:

Answer:

5.05

Step-by-step explanation:

-2.7+7.75

2.7 is how much he descends so its negative

And 7.75 for how much he went up so its positive

Polygon KLMN is similar to polygon PQRS. What is the length of QR?

Answers

Answer:

D. 6 cm

Step-by-step explanation:

3/4.5=4/QR

Cross multiply

18/3=6

Can I get the answers to 29 and 33?

Answers

Can’t really see the problems. :(

Chris lost 4 of the 10 dollar bills that his parents gave him for his birthday. What percentage of his dollar bills did he lose?

Answers

Answer:

Step-by-step explanation:

Percentages are always out of 100 and can be illustrated by fractions.

[tex]\frac{4}{10}[/tex]   [tex]\frac{x}{100}[/tex]

To find out x, you multiply 100x4 then divide by 10.

This leaves us with [tex]\frac{40}{100}[/tex]

Which is also 40%.

Can someone Please help!!!!

BRAINLY for correct answer!

Answers

Answer:

i belive 11 and 1 sorry if it is not right

Step-by-step explanation:

Please help me ASAP i will give brainiest

Answers

Answer:

The answer is B

Step-by-step explanation:

Since parallelograms have a total of 360 degrees, you just have to add the 115 and 64 to get 179. The 124 is completely irrevant in this entire problem. So then 360-179=181. It is B because y is an acute angle, meaning that the value HAS to be under 90 degrees, and only B has y as an acute angle measurement.

Answer:

B bro

Step-by-step explanation:

5 tenths - 2 tenths = 3 tenths in standard form

Answers

Answer:

5×10-2×10=3×10

50-20=30i think

Help! 4 √5 - √3 + 3√5

Answers

Answer:

1.47327392

Step-by-step explanation:

Answer:

7 √5 - √3

Step-by-step explanation:

collect like terms:

(4 √5 - √3 + 3√5)

What is the GCF of 48mn and 81m?n??
О Зmn
О Зmn
О. 48men
О 129m52

Answers

Answer:

3m2n is the answer this answer but I dotnsee its s an option

Which graph represents x > 23

A. 23 To the right

B. 23 to the left

In a number line?

Answers

Answer:

e

Step-by-step explanation:

The correct answer is e
O

Evaluate a2 − 2b for a = 2 and b = −4.

Answers

a^2 - 2b
2^2 - 2(-4)
4 + 8
12

Hope this helps!!!!

solve for x using Logarithm
4^x+6^x =9^x​

Answers

4^x + 6^x = 9^x

4^x + 6^x - 9^x = 0

2^2x + (2×3)^x - 3^2x = 0

2^2x + 2^x×3^x - 3^2x = 0

(⅔)^2x + (⅔)^x - 1 = 0

let t = ( ⅔)^x

t² + t - 1 = 0

t = (-1+√5 ) / 2

(⅔)^x = (-1+√5 ) / 2

x = Log base ⅔ ((-1+√5 ) / 2 )


x = 1.18681

Explain the importance of using the square of the scale factor to calculate the area of a dilated figure

Answers

Answer:

2

Step-by-step explanation:

2+2=4 therefore 2x2 also equals 4, 4/2=2.

In mathematics and geometry, a dilation is an enlargement in size or a reduction in size of a mathematical object. We perform a dilation of a square by placing the shape on a coordinate plane and multiplying each of the coordinates of the vertices of the square by the same number, called the scale factor. This can also be achieved by multiplying the lengths of each of the sides of a square by the scale factor.

When we dilate a square by a scale factor of k, its sides increase by a factor of k, its area by [tex]k^{2}[/tex], and its volume by [tex]k^{3}[/tex].

So, this is the importance of using the square of the scale factor to calculate the area of a dilated figure.

What is Square?

Square, in geometry, a plane figure with four equal sides and four right (90°) angles. A square is a special kind of rectangle (an equilateral one) and a special kind of parallelogram (an equilateral and equiangular one).

What is scale factor?

The scale factor is a measure for similar figures, who look the same but have different scales or measures. Suppose, two circle looks similar but they could have varying radii. The scale factor states the scale by which a figure is bigger or smaller than the original figure.

What is dilation?

In mathematics and geometry, a dilation is an enlargement in size or a reduction in size of a mathematical object. We perform a dilation of a shape by placing the shape on a coordinate plane and multiplying each of the coordinates of the vertices of the shape by the same number, called the scale factor.

According to question, we have to explain  the importance of using the square of the scale factor to calculate the area of a dilated figure.

When we dilate a square by a scale factor of k, its sides increase by a factor of k, its area by [tex]k^{2}[/tex], and its volume by [tex]k^{3}[/tex].

In mathematics and geometry, a dilation is an enlargement in size or a reduction in size of a mathematical object.

We perform a dilation of a square by placing the shape on a coordinate plane and multiplying each of the coordinates of the vertices of the square by the same number, called the scale factor.

This can also be achieved by multiplying the lengths of each of the sides of a square by the scale factor.

Hence, these are the importance of using the square of the scale factor to calculate the area of a dilated figure.

Learn more about dilation here:

https://brainly.com/question/13176891?referrer=searchResults

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Select all ratios equivalent to 20:18.
3:2
18:9
30:27

Answers

Answer:

30:27 i think

Step-by-step explanation:

The measures of two complementary angles are described by the expression(13y+12) and (20y+12). Find the measures of angles​

Answers

Step-by-step explanation:

complementary angles means that both of them together = 90

13y +12 + 20y + 12 = 90

add all y together and numbers together

33y + 24 = 90

solve for y

33y= 66. y= 2

now let's get the measurements of the angles

13(2) + 12= 38

20(2) + 12= 52

which of the following graphs is described by the function given below? y=x2-6x-16

Answers

Answer:

I need a picture of the graphs first. I will comment the answer when I see the graphs

Step-by-step explanation:

Answer:

THE ANSWER IS GRAPH C

Step-by-step explanation:

A

P

E

X  AND WITH THE HELP OF SOMEONE ELSE.

A line has a slope of -1/10
and includes the points (1, -6) and (t, -5). What is the value of t?

Answers

Answer:

-9

Step-by-step explanation:

Here we use the slope formula: m= y2-y1/x2-x1. We simply plug in the numbers we know: -1/10 = -5+6/t-1. Then we solve for t. Multiply both sides by (t-1) so -1/10 (t-1)= 1. Then multiply both sides by -1/10 so t-1= -10 and then add one to both sides so t=-9.

Is the following statement true? Explain.

" For any two angles A and B, cos (A+B)=cos (A)+cos (B) "

Answers

Step-by-step explanation:

We can prove the statement is false by proof of contradiction:

We know that cos0° = 1 and cos90° = 0.

Let A = 0° and B = 90°.

Left-Hand Side:

cos(A + B) = cos(0° + 90°) = cos90° = 0.

Right-Hand Side:

cos(A) + cos(B) = cos(0°) + cos(90°)

= 1 + 0 = 1.

Since LHS =/= RHS, by proof of contradiction,

the statement is false.


Helpppppp meeeeeeeeee

Answers

Answer:

The temperature needs to rise 1.5 degree C to reach 0 degree C.

Step-by-step explanation:

-1.5+1.5=0

1.5 not that hard but hope it helps

What is the volume of this cube? If it only shows one edge that says 0.5m?

Answers

Answer:

0.125 or about 0.13

Step-by-step explanation:

Length times width times height.

What is the surface area of this triangular prism?




640 square centimeters

672 square centimeters

960 square centimeters

800 square centimeters

Answers

the picture does not match the question.

Answer:

for triangular prism: 672

for picture: 24

Step-by-step explanation:

What type of transformation transforms (a, b) to (-a, b)?

a reflection over the y-axis
a translation of 1 unit down
a reflection over the x-axis
a translation of 1 unit up

Answers

Answer:

A reflection over the y axis .

Step-by-step explanation:

Given  : Transforms (a,b) to (-a,b).

To find : What type of transformation.

Solution : We have given

Parent function : (a,b) .

Transformed  : (-a ,b).

Transformation rule of reflection over y axis : ( x, y) →→ ( -x ,y).

Then we can say in transformation (a,b) →→→→ (-a,b).

Therefore, A reflection over the y axis

Step-by-step explanation:

plz brain list

Answer:

hes right i took the test

Step-by-step explanation:

−5.55−8.55c+4.35c answer please​

Answers

Answer:

-5.55- 4.2c hope this helps

Step-by-step explanation:

Given an absolute value function f(x)=|x|, what is the effect of adding a constant k to the function?

Answers

Answer: the graph of the resulting function, |x| + k, is the graph of f (x) shifted k units up

Step-by-step explanation:

just took the test

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