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AlekseyPX
3 years ago
12

How to solve for y with 9x-y=45?? Help!!

Mathematics
2 answers:
MA_775_DIABLO [31]3 years ago
8 0
I think that's the answer

mojhsa [17]3 years ago
3 0

Isolate the y. Note the equal sign. What you do to one side, you do to the other.

First, subtract 9x from both sides

9x (-9x) - y = 45 (-9x)

-y = -9x + 45

Next, divide - 1 from both sides to isolate the y.

(-y)/-1 = (-9x + 45)/-1

y = 9x - 45

y = 9x - 45 is your answer

hope this helps

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The volume of air inside a rubber ball with radius r can be found using the function V(r) = four-thirds pi r cubed. What does V
Nat2105 [25]

Corrected Question

The volume of air inside a rubber ball with radius r can be found using the function V(r) = four-thirds pi r cubed. What does V(5/7) represent?

Answer:

(B)the volume of the rubber ball when the radius equals five-sevenths feet

Step-by-step explanation:

The Volume of a sphere of radius r can be found using the formula:

V(r)=\dfrac43 \pi r^3

Therefore comparing the expression: V(\dfrac57)  with V(r):

Radius, r=\dfrac57

Thus, V(\dfrac57)  is the volume of a ball of radius \dfrac57 feet.

The correct option is B.

4 0
3 years ago
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Find the exact value of cos(a+b) if cos a=-1/3 and cos b=-1/4 if the terminal side if a lies in quadrant 3 and the terminal side
maria [59]

Answer:

cos(a + b) = \frac{1}{12}(1-2\sqrt{30})

Step-by-step explanation:

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cos(a) = -\frac{1}{3}

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Since, terminal side of angle 'a' lies in quadrant 3, sine of angle 'a' will be negative.

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Similarly, terminal side of angle 'b' lies in quadrant 2, sine of angle 'b' will be  negative.

sin(b) = -\sqrt{1-(-\frac{1}{4})^2}

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By substituting these values in the identity,

cos(a + b) = (-\frac{1}{3})(-\frac{1}{4})-(-\frac{2\sqrt{2}}{3})(-\frac{\sqrt{15}}{4})

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Therefore, cos(a + b) = \frac{1}{12}(1-2\sqrt{30})

5 0
3 years ago
Use the image below to answer the following parts.
12345 [234]

Answer:

Step-by-step explanation:

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