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Dennis_Churaev [7]
2 years ago
5

Q11 The price of a smartphone is $600 and a smart watch is $250. If you buy them together you get a discount of 20%. If you deci

de to buy both, how much will you end up paying?
Q12Another store is offering the smart watch for $100 if purchased with the smartphone. Is this a better deal than the previous one (Q11)?
Mathematics
2 answers:
dimulka [17.4K]2 years ago
4 0

Answer:

above is the solution to the question

Iteru [2.4K]2 years ago
4 0

Answer:

Yes, the deal for Q12 is better than the previous one.

Step-by-step explanation:

600 + 250 = 850

850 × 20 = 17000

17000 / 100 = 170

850 - 170 = 680 He will pay $680 (Q11)

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A room is 30m long , 24m broad and 18m high. Find (a) Length of the longest rod that can be placed in the room. (b) Its tolal su
melomori [17]

Answer:

Part a) The length of the longest rod that can be placed in the room is 42.43 m

Part b) The total surface area is SA=3,384\ m^2

Part c) The volume is equal to V=12,960\ m^3

Step-by-step explanation:

Part a) Find the length of the longest rod that can be placed in the room

The room is in the shape of a rectangular prism, so the longest rod that can be placed in the room is equal to the diagonal of the rectangular prism

Let

d -----> diagonal of the base of the room

D ----> diagonal of the rectangular prism

step 1

Find the diagonal of the base

Applying the Pythagoras Theorem

d^{2}=30^{2}+24^{2}

d^{2}=1,476

d=\sqrt{1,476}\ m

step 2

Find the diagonal of the rectangular prism

The legs of the diagonal of the rectangular prism are the diagonal of the base and the height of the room

Applying the Pythagoras Theorem

D^{2}=(\sqrt{1,476})^{2}+18^{2}

D^{2}=1,476+324

D^{2}=1,800

D=42.43}\ m

Part b) Find the total surface area

we know that

The total surface area of the room is equal to

SA=2B+PH

where

B is the area of the base of the room

P is the perimeter of the base of the room

H is the height of the room

so

SA=2[(30)(24)]+2[30+24](18)

SA=1,440+1,944

SA=3,384\ m^2

Part c) Find the volume

we know that

The volume of the room is equal to

V=BH

where

B is the area of the base of the room

H is the height of the room

so

V=[(30)(24)](18)

V=12,960\ m^3

5 0
3 years ago
3. The table shows the lowest temperatures of several cities.
JulijaS [17]

Please check attached vertical number line.

(a) The temperature differences are listed below:


Between Cities                            Temperature difference


Smithton and

Hedgeburough                                  2.5 - (-1.1) = 2.5 + 1.1 = 3.6


Hedgeburough and

East Bunting                                       - 1.1 - (- 0.5) = - 1.1 + 0.5 = -0.6


East Bunting and

Smithton                                             2.5 - (- 0.5) = 2.5 + 0.5 = 3

7 0
3 years ago
Read 2 more answers
un objeto cae accidentalmente de un vehículo que lleva una rapidez de 50 kilómetros por hora y recorre 20 m antes de detenerse​
Svet_ta [14]

Un objeto cae accidentalmente de un vehículo con una velocidad de

50 km / hy recorra 20 m antes de detenerse.

Calcular:

a) La aceleración:

b) El tiempo que tarda en detenerse:

Responder:

1.439 s

-9,645 m / s²

Explicación paso a paso:

Dado que:

Velocidad en m / s = (50 * 1000) / 3600 = 13.899 m / s

Distancia (d) = 20

Tiempo = distancia / velocidad

Tiempo = 20 / 13.889

Tiempo = 1.439 s

Aceleración (a):

Cambio de velocidad / tiempo empleado

= (0 - 13,889) / 1,439

- 13.889 / 1.439

= -9,645 m / s²

5 0
3 years ago
Andre is preparing for the school play. He needs to paint a cardboard box to look like a dresser. The box is a rectangular prism
ozzi

Answer:

Step-by-step explanation:

75 is right

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3 years ago
I NEED A ANSWER QUICK! Karin and Will are taking the same math class
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Will's test had more questions
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3 years ago
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