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olga55 [171]
3 years ago
11

Which statement is true about .75z = .25z -3 + 5

Mathematics
1 answer:
stepladder [879]3 years ago
4 0
<span>.75z = .25z -3 + 5
</span><span>.75z = .25z + 2
.50 z = 2
      z = 4

answer
</span>a. one solution (  z = 4)
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OABCD is a pyramid with a rectangular base of sides 15cm by 9cm.Given that the slant height OQ is 16cm find its
crimeas [40]

Hello! Your answer is below... Remember : h = height and v = volume

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3 0
3 years ago
Read 2 more answers
4. What are the values of x and y? HELP PLEASE
Sergeeva-Olga [200]
The bottom answer is correct. I had some trouble with this so I had to find x and y in separate parts.

TO FIND X
notice that the top triangle and bottom triangles are similar, meaning if you multiple all three sides of one by a specific number, it becomes the same size as the bottom triangle.

17 x n = 8, therefore n=8/17
8 x n = X, therefore X=64/17

For some reason, this does not give a correct value for Y, so I had to use trig 

TO FIND Y 

Notice that the angle DAB is the same as DBC (lets call this angle Ø)

Using trig rule, we know that the cos of an angle is equal to the adjacent side divided by the hypotenuses.

We can now form some equations:

cosØ = 15/17 (from the top triangle)
cosØ = 8/Y      (from bottom triangle)
Now we know that Y=(8x17)/15 = 136/15

X=64/15  Y=136/15
8 0
3 years ago
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