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il63 [147K]
3 years ago
10

Help me plsss................

Mathematics
1 answer:
aksik [14]3 years ago
6 0
It’s 28 divided by 7 x 15 -13
How do I know ? I’m in high school and I just worked it out !!
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What is the solution to the rational equation 1/5+3/x-5=9/20
yarga [219]
Solve for x over the real numbers:
-5 + 1/5 + 3/x = 9/20

-5 + 1/5 + 3/x = 3/x - 24/5:
3/x - 24/5 = 9/20

Bring 3/x - 24/5 together using the common denominator 5 x:
-(3 (8 x - 5))/(5 x) = 9/20

Cross multiply:
-60 (8 x - 5) = 45 x

Expand out terms of the left hand side:
300 - 480 x = 45 x

Subtract 45 x + 300 from both sides:
-525 x = -300

Divide both sides by -525:
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Given that 2^x = 7, find the value of 4^x-1.
Helga [31]

4=2^2\\\\4^x=(2^2)^x=(2^x)^2=7^2=49\\\\4^x-1=49-1=48


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4 0
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Have I worked out the following right:
Studentka2010 [4]

Answer: I think the answer is 173.25


Step-by-step explanation:

To find that you have to times them.

15.0*11.55 = 173.25


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