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OlgaM077 [116]
3 years ago
15

Find the range of f(x)=-2x-5 for domain -2, -1, 1, 2

Mathematics
2 answers:
SashulF [63]3 years ago
8 0
Range = {-2(-2) - 5, -2(-1) - 5, -2(1) - 5, -2(2) - 5} = {4 - 5, 2 - 5, -2 - 5, -4 - 5} = (-1, -3, -7, -9}
Salsk061 [2.6K]3 years ago
6 0

Answer:

{-1, -3, -7, -9} is  the range of the function f(x)

Step-by-step explanation:

Domain is the set of all complete possible values of x variable.

Range is the set of all values of f(x)

Given the function:

f(x) = -2x-5        .....[1]

Domain: {-2, -1, 1, 2}

For x = -2,

Substitute in [1] we have

f(-2) = -2(-2)-5 = 4-5 = -1

Similarly ,

For x = -1

f(-1) = -2(-1)-5 = 2-5 = -3

For x = 1:

f(1) = -2(1)-5 = -2-5 = -7

For x = 2

f(2) = -2(2)-5 = -4-5 = -9

Therefore, the range of f(x) = {-1, -3, -7, -9}

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Harry buys a TV priced at £1200 plus 20% VAT.
RoseWind [281]

Answer:

£ 114

Step-by-step explanation:

From the question given above, the following data were obtained:

Price of TV = £ 1200

VAT = 20%

Amount paid = £ 300

Amount paid monthly =.?

Next, we shall determine the VAT. This can be obtained as follow:

VAT = 20% of price of TV

VAT = 20/100 × 1200

VAT = £ 240

Next, we shall determine the total cost of the TV. This can be obtained as follow:

Price of TV = £ 1200

VAT = £ 240

Total cost of TV =?

Total cost = Price + VAT

Total cost = 1200 + 240

Total cost = £ 1440

Next, we shall determine the balance amount he needs to pay. This can be obtained as follow:

Total cost = £ 1440

Amount paid = £ 300

Balance amount =?

Balance = Total cost – Amount paid

Balance = 1440 – 300

Balance = £ 1140

Finally, we shall determine the amount Harry will pay month.

Balance Amount = £ 1140

Number of months = 10

Amount paid monthly =.?

Amount paid monthly = Balance / number of month

Amount paid monthly = 1140 / 10

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Therefore, Harry will pay £ 114 monthly.

4 0
2 years ago
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artcher [175]

Answer:

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Step-by-step explanation:

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3 years ago
At Gms there are 5 females for every 4 males. if there are 372 males, then how many females are there​
Ann [662]

Answer:

465 females

Step-by-step explanation:

(372/4) x 5 = 465

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3 years ago
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3 years ago
200 kg of brass is melted down and cast into ornamental frogs, each weight 3/20kg. How many frogs are made?
Savatey [412]

Answer:

1,333 frogs

Step-by-step explanation:

okay so we know that mass remains conserved no matter where you are.

same here ^^

if the total mass of brass is 200 kg

the total mass of the new frogs formed from it when put together will be the same :)

and if there were n such frogs formed

we have,

total mass = n × mass of each frog

200 = n × 3/ 20

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3 years ago
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