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3 years ago

Helppppppp I need the answer now

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

3 0

Answer:

The domain is all real number

the range is y is greater than or equal to 0

Step-by-step explanation:

The domain indicates the x while

The range indicates the y .

Hope it helps

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It took14 min to walk around the block 4times. What was her unit rate?

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7.5 min per walk around the block

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2 years ago

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Simplify the expression -14

ehidna [41]

It would just be -14 still

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3 years ago

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arlik [135]

Given:

In a right angle triangle θ is an acute angle and $\tan\theta =\dfrac{3}{5}$ .

To find:

The value of $\cos \theta$ .

Solution:

In a right angle triangle,

$\tan \theta=\dfrac{Perpendicular}{Base}$

We have,

$\tan\theta =\dfrac{3}{5}$

It means the ratio of perpendicular to base is 3:5. Let 3x be the perpendicular and 5x be the base.

By using Pythagoras theorem,

$Hypotenuse=\sqrt{Perpendicular^2+base^2}$

$Hypotenuse=\sqrt{(3x)^2+(5x)^2}$

$Hypotenuse=\sqrt{9x^2+25x^2}$

$Hypotenuse=\sqrt{34x^2}$

$Hypotenuse=x\sqrt{34}$

In a right angle triangle,

$\cos \theta=\dfrac{Base}{Hypotenuse}$

$\cos \theta=\dfrac{5x}{x\sqrt{34}}$

$\cos \theta=\dfrac{5}{\sqrt{34}}$

Therefore, the value of $\cos \theta$ is $\dfrac{5}{\sqrt{34}}$ .

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2 years ago

Suppose Larry has 16 books and Pat has x books. (Larry still has at least 3 more than Pat.)

zimovet [89]

Answer:

13 ≥ x

Step-by-step explanation:

Larry = 16
Pat = x

<u>Larry has at least 3 more than Pat</u>

16 ≥ x + 3

<u>Simplified</u>

16-3 ≥ x + 3 - 3
13 ≥ x

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3 years ago

When a cold drink is taken from a refrigerator, its temperature is 5°C. After 25 minutes in a 20°C room its temperature has incr

Andrews [41]

Answer:

(a) 13.85 °C

Step-by-step explanation:

The temperature difference is a decaying exponential function of time. Here, it decreases from an initial difference of 15 °C to 10 °C after 25 minutes. So, that temperature difference can be modeled as ...

ΔT = 15(10/15)^(t/25)

We want to find the value of this at t=55. It is ...

ΔT = 15(2/3)^(55/25) ≈ 6.15

This is the amount the temperature of the drink is below room temperature.

drink temperature = (20 - 6.15) °C = 13.85 °C

The temperature of the drink after 55 minutes is about 13.85 °C.

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3 years ago