2 years ago

Is this a function or no?

Mathematics

1 answer:

IgorLugansk [536]2 years ago

5 0

Answer:

Step-by-step explanation:

Positives cannot point at negatives I think.

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In a local city, the temperature at noon is -3C The temperature is expected to decrease by 2.5C each hour until the temperature

LiRa [457]

Writing the equation that governs this situation:

-3C - (2.5C/hr)x = -18C

Simplifying, -3 - 2.5x = -18, or 3 + 2.5x = 18

Combining like terms: 2.5x = 18-3 = 15

Then x = 15/2.5 = 6. The temp. will reach -18C after 6 hours.

7 0

3 years ago

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What is the slope between these two points?<br> (0,13) and (-4,10)

DIA [1.3K]

First you will use the slope formula:
M= Rise/Run = Y2-Y1/X2-X1

(0,13) (-4,10)

10-13
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3 years ago

Help Please! No Links Please!

CaHeK987 [17]

Answer:

140

Step-by-step explanation:

180 - 120 = 60 (angle3)

180-100 = 80 (angle 2)

180 - (60 + 80 ) = 40 (angle 1)

180- 40 = 140

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2 years ago

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Which choice is equivalent to the expression below √-81

garri49 [273]

Answer:

Step-by-step explanation:

$\sqrt{-81}$ is the same as $\sqrt{81}$ · $\sqrt{-1}$

This can be simplified to 9 · $\sqrt{-1}$

And the square root of -1 is i,

so this equals 9i

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3 years ago

On Monday the temperature was 12°C. On Tuesday it decreased by 12°C. Which expression can be used to represent this situation?

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