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nika2105 [10]
3 years ago
9

Need help answering these questions please.

Mathematics
1 answer:
andrew-mc [135]3 years ago
5 0
The 1st one is 7.50 because you multiply 5.50 times 3 and it gives you 16.50 and you subtract it by 9 and it gives you 7.50
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It is given that 2^x = 5^y = 10^z , express z in terms of x and y​
weqwewe [10]

9514 1404 393

Answer:

  z = (xy)/(x+y)

Step-by-step explanation:

Taking logarithms base 10, we have ...

  x·log(2) = y·log(5) = z·log(10)

  z = x·log(2) = y·log(5) . . . . . . . . log(10) = 1

__

Then z/x = log(2), and z/y = log(5), so ...

  z/x +z/y = log(2) +log(5) = log(2·5) = 1

  z = 1/(1/x +1/y) = 1/((x+y)/(xy))

  z = (xy)/(x+y)

4 0
3 years ago
Read 2 more answers
1 point
s2008m [1.1K]

Answer:

i do not know

Step-by-step explanation:

6 0
2 years ago
Help Me Pls Thanks <3
dybincka [34]
If there are 150 total instruments in said Orchestra, we'll need to divide that number in half.
75, simple enough. Now we know that half of 150 is 75.
Start by writing your problem like this: 150= 75w+37.5b
That equation is all I can think of, because 37.5 is half of 75, which means that's roughly the number you're looking for. Sorry if this doesn't help much<span />
8 0
3 years ago
Can someone please give me a scenario of this please Y=3x + 2
Deffense [45]

Ahhh I think that is cheating?

Soz I know the anaswer but I cant tell you have to do by your self to learn you can't always ask for answers :<

7 0
3 years ago
Read 2 more answers
Is 40 is 50% of 80 true or false<br> With step by step evidence
Fantom [35]

Answer:

please mark brainliest

it is true

Step-by-step explanation:

if you multiplie 80 by 0.50 you will get 40,

4 0
3 years ago
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