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SVETLANKA909090 [29]
2 years ago
13

Evaluate x + 4x when x = 20.

Mathematics
1 answer:
Maru [420]2 years ago
6 0

Answer:

Step-by-step explanation:

20+4(20) 20+80 = 100

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Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?
hjlf
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On the other hand,

(-a)^2=((-1)\cdot a)^2=(-1)^2\cdot a^2=1\cdot a^2=a^2

which can never be negative for real a.
6 0
3 years ago
if 4 shirts and 3 ties cost 241. and 3 shirts and 4 ties cost 200. what is the cost of 1 shirt and 1 tie?​
Inessa05 [86]

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Step-by-step explanation:

3 0
3 years ago
Claire is a manager at a toy packaging company. The company packs 80 boxes of toys every hour for the first 3 hours of the day.
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Answer:

See the attached figure.

Step-by-step explanation:

Modeling each part as a function.

Let x is hours of the working day

The company packs 80 boxes of toys every hour for the first 3 hours of the day. ⇒ y₁ = 80 x , x ∈ [0,3]

At the end of the 3 hours The company packs = 80 * 3 = 240

They stop packaging for the next 2 hours in order to carry out a training session. ⇒ y₂ = 240 , x ∈ [3,5]

Then, for the next 4 hours, they pack 20 boxes of toys every hour

y₃ = 20x + c , x ∈ [5,9]

To find c, y₂ = y₃ at x =5

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∴ c = 240 - 20 * 5 =240 - 100 = 140

∴ y₃ = 20x + 140 , x ∈ [5,9]

So,

y₁ = 80 x , x ∈ [0,3]

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y₃ = 20x + 140 , x ∈ [5,9]

The graph models the piecewise function for the given situation is as shown in the attached figure.

8 0
3 years ago
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The next larger whole number is  27 .
The next smaller whole number is  26 .

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So the nearest whole number is  27 .

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3 years ago
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Answer:

8. -\frac{1}{9} and 1

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Step-by-step explanation:

Hope this helps ;)

7 0
3 years ago
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