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2 years ago

I have been doing math all day, please help!

Mathematics

2 answers:

tester [92]2 years ago

8 0

Substitute x and y with the value from table. The correct answer is A. 7=-3(-1)+4.

Kay [80]2 years ago

8 0

Answer:

y = -3x + 4

Step-by-step explanation: Substitute the numbers in for x & y to see which one is the answer.

(-1, 7):

y = -3x + 4

7 = -3(-1) + 4

7 = 3 + 4

7 = 7

TRUE

(2, -2):

y = -3x + 4

-2 = -3(2) + 4

-2 = -6 + 4

-2 = -2

TRUE

(7, -17):

y = -3x + 4

-17 = -3(7) + 4

-17 = -21 + 4

-17 = -17

TRUE

(10, -26):

y = -3x + 4

-26 = -3(10) + 4

-26 = -30 + 4

-26 = -26

TRUE

Hope this helps you!!! :)

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The volume of the water in the cup when it is full.

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The volume of the water is equal to the difference of the volume of the small cone and the larger cone.

Here, the ratio of the radius of both cones is equal to the ratio of their heights. SO,

$\begin{gathered} \frac{r}{2.7}=\frac{20}{20-8} \\ \frac{r}{2.7}=\frac{20}{12} \\ \frac{r}{2.7}=\frac{5}{3} \\ r=4.5 \end{gathered}$

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The volume of water when the cup is full is 332.64 cm^2.

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11 months ago

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Deffense [45]

Answer:

5√3

Step-by-step explanation:

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Multiplying by 5, we have ...

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_____

<em>Additional comment</em>

y is the side adjacent to the 30° angle, so can be found from ...

Cos = Adjacent/Hypotenuse

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