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svetoff [14.1K]
3 years ago
14

If the mean is 2.7 determine the value of x and y

Mathematics
1 answer:
Allisa [31]3 years ago
5 0

Answer:

13.5 and 13.5

Step-by-step explanation:

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What are the values of a1 and r of the geometric series?
tester [92]

Answer:

r = 1/3

= 1

Step-by-step explanation:

1 + 1/3 + 1/9 + 1/27 + 1/ 81

In this series a is the first  term = 1

r is the common ratio = 2nd term/1st term = 3rd term/ 2nd term

r = 1/3 ÷ 1 = 1/9 ÷ 1/3

r = 1/3

I hope this was helpful, please mark as brainliest

4 0
3 years ago
If your cell phone bill was $67.85 and there is a 7.5% late fee how much will your bill be?
dedylja [7]

67.85 \times .075 = 5.08875 \\ 67.85 + 5.08875 = 72.94
bill is $72.94
6 0
3 years ago
Read 2 more answers
What two numbers multiply to 10 and add to -29 ?
Degger [83]
Xy=10
x+y=29

subtract x from both sides for second equation

y=-x-29
subsitute in second equaiton
x(-x-29)=10
-x^2-29x=10
add x^2+29x to both sides
x^2+29x+10=0
quadratic formula
if you have
ax^2+bx+c=0,
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}

so
x^2+29x+10=0
a=1
b=29
c=10
x=\frac{-29+/- \sqrt{(-29)^{2}-4(1)(10)} }{2(1)}
x= \frac{-29+/- \sqrt{841-40} }{2}
x= \frac{-29+/- \sqrt{801} }{2}
x= \frac{-29+/- 3\sqrt{89} }{2}

x= \frac{-29- 3\sqrt{89} }{2} or \frac{-29+ 3\sqrt{89} }{2}
those are the 2 numbers
aprox=-28.65 and -0.349


5 0
3 years ago
Read 2 more answers
Help, please<br> I'm stuck on 4
gulaghasi [49]
What is account 5..?
5 0
3 years ago
Read 2 more answers
I need to know how to do this step my step and the answer
MissTica
You can use the calculator or 0^2 is 0 x -3 =0 +7 (0) -4 =-4
5 0
3 years ago
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