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frutty [35]
3 years ago
15

Mr.Lee is shopping for a new electric water heater. Brand A costs $586 and uses 444 kilowatt-hours per month. Brand B costs $639

and uses 377 kilowatt-hours per month. If electricity costs $0.17 per kilowatt-hour, how much would Mr.Young save on electricity per month by buying brand B?
Mathematics
1 answer:
Nostrana [21]3 years ago
6 0

Answer:

mr.young would save 11.39 per month on buying brand b

Step-by-step explanation:

0.17×444=75.48

0.17×377=64.09

75.48-64.09=11.39

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Nadia drew a design for a copper wire sculpture as shown above.She plans to make a wire frame that includes the perimeter of the
Step2247 [10]

Answer:

She does not have enough wire.

Step-by-step explanation:

The complete question included a design for her sculpture. It is a circle inscribe in a square and the length of the square is 9 inches. The picture above describe the design.

She has in possession a 5 ft of copper to construct a circle inscribe in a square.

The square is 9 inch length.

Perimeter of the square = 4L

where

L = length

Perimeter of the square = 4 × 9

Perimeter of the square = 36 inches

Circumference of a circle = 2πr

r = diameter/2 = 9/2 = 4.5 inches

Circumference of a circle = 2 × π × 4.5

Circumference of a circle = 2 × 4.5 × 3.14

Circumference of a circle = 9 × 3.14

Circumference of a circle = 28.26 inches.

The sculpture will consume 36 inches for the square and 28.26 inches for the circle. The total length for the sculpture will be 36 + 28.26 = 64.26 inches.

She has 5 ft copper for the sculpture . Let us covert the inches to ft to know if the copper wire is enough.

12 inches = 1 foot

64.26 inches = ?

cross multiply

wire required for the sculpture = 64.26/12

wire required for the sculpture = 5.355 ft

She does not have enough wire.

5 0
3 years ago
Researchers counted and tagged 638 deer. On their next visit, they counted 105; only 35 were marked. Estimate the total deer pop
Vedmedyk [2.9K]

Answer:

1914

Step-by-step explanation:

Let the estimated total population of the deer =x

Out of x, 638 were tagged.

Out of 105, 35 were marked.

Expressing this as a ratio of the total to tagged, we have:

x:638=105:35

\dfrac{x}{638}=\dfrac{105}{35}  \\$Cross Multiply\\35x=105*638\\x=(105*638)\div 35\\x=1914

Therefore, the total deer population in the area is approximately 1,914.

3 0
4 years ago
How much is the sales tax in California?
svp [43]
The sales tax is normally 7.25%, but some local municipalities have their taxes up to 10.25%.
3 0
3 years ago
Read 2 more answers
Graph by using the slope and the y intercept.
Mashutka [201]

1. a) equation of the line :

  • y =  \dfrac{2}{5}x   - 7

y - intercept = -7

so, it will pass through point (0, -7)

and if we plug the value of x as 5, we get

  • y =  (\dfrac{2}{5}  \times 5) - 7

  • y = 2 - 7

  • =  - 5

so, it will pass through point (5, -5) too

now, just plot the points (0 , -7) and (5 , -5) and join them.

2. b) equation of line is :

  • y =  - 3x + 5

here, y - intercept = 5

so the line passes through point (0 , 5)

now, Plugging the value of x = 1 we get :

  • y =(  - 3 \times 1) + 5

  • y =  - 3 + 5

  • y = 2

so, the given line passes through point (1 , 2)

plotting the points, we can get our required line.

6 0
3 years ago
Please help me..thx!
GarryVolchara [31]

Answer:

x=25

Step-by-step explanation:

X=180-125-30

x=25

5 0
3 years ago
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