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dolphi86 [110]
3 years ago
14

If z varies inversely as w, and z= 3 when w=4, find z when w=2. Z=

Mathematics
1 answer:
vivado [14]3 years ago
8 0

Answer:

6

Step-by-step explanation:

Inverse proportion.

z = k/w

z = 3, w = 4

Solve for k constant.

3 = k/4

(4)3 = (4)k/4

12=k

The value of k constant is 12.

z = k/w

Put w as 2 and k as 12 and solve for z.

z = 12/2

z = 6

The value of z when w equals 2 is 6.

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Jules walks 34 miles in 12 hour. What is Jules' speed in miles per hour?​
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2 years ago
In the diagram, HGF is a straight line. Given EF = 4 cm and HG = GF = 3 cm, find :
Alecsey [184]
If HG and GF are both 3, then the whole length of the base is 6. The tan ratio is the side opposite the reference angle (length 4) over the side adjacent to the angle (length 6), which for us looks like this:
tan(x)= \frac{4}{6} = \frac{2}{3}=.6666667
Now use the inverse tan button (2nd-->tan) to get
tan^{-1} (.66667)=33.69
As far as the sin y goes, you have to use the Law of Sines because you are not working with a right triangle in that case.  I mean you are as far as having to find out what the hypotenuses are triangle EFH and triangle EFG.  The hypotenuse in triangle EFH is 7.211, and the hypotenuse in triangle EFG is 5. Using the Law of Sines to solve for y, you get this:
\frac{siny}{7.211} = \frac{sin33.69}{5}
Solving for y and using the inverse sin gives you that y = 53.12
If you are not familiar with setting up the Law of Sines, nothing I could tell you here would help. If you are familiar, then you get the idea of where the numbers came from and why they are set up that way. Hope that helps. That second part was quite hard.

7 0
3 years ago
Answer pleaseeeee, i need this done quickly
Vikentia [17]
60, 120, 180

It’s honestly super easy each hour is 69 multiply it by 2 then bultiply 60 by 3
6 0
3 years ago
Read 2 more answers
Factor completely.<br>..........
xz_007 [3.2K]
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3 years ago
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