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vlabodo [156]
2 years ago
15

Please help will mark brainliest

Mathematics
1 answer:
NeX [460]2 years ago
7 0

Answer: 145.8

Step-by-step explanation:   you have to divide 45 and 25 to get 1.8, then you get 81 and you multiply 81 x 1.8 to get your answer.

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A circle has a circumference of 138.16 meters. What is the diameter of the circle ?
Neporo4naja [7]
<span>circumference = 2 π r
138.16 = 2 π r
138.16/2π = 2π/2π r
21.98884694 =r
D</span><span>iameter = r X 2
</span>Diameter = <span><span>21.98884694</span> X 2</span>
Diameter = 43.97769388
7 0
3 years ago
Simplify 8i^6+6i^5-5i^3-3i^2-7i-9<br><br> A) -14+4i B) -4+4i C) -10i D) -14-18i
kipiarov [429]
The answer is A) -14 + 4i. God bless!
7 0
3 years ago
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lara [203]

Answer:

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8 0
3 years ago
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Find the exact value of tan 15 degrees
pentagon [3]
<span>tan(15) = 
sin(15) / cos(15) = 
sin(45 - 30) / cos(45 - 30) = 
[ sin(45)cos(30) - sin(30)cos(45) ] / [ cos(45)cos(30) + sin(45)sin(30)] 

Since sin(45) = cos(45) = √2/2, you can just factor that out from the top and bottom 
[ cos(30) - sin(30) ] / [ cos(30) + sin(30)] 
[ √3/2 - 1/2 ] / [ √3/2 + 1/2] 
(√3 - 1) / (√3 + 1) 
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There's also a formula for tan(a-b), but I couldn't remember it off hand.</span>
4 0
3 years ago
Find all sets of four consecutive integers whose sum is between 95 and 105
Nat2105 [25]
Hello,

Let n-2,n-1,n,n+1 the foru numbers
s=n-2+n-1+n+n+1=4n-2

95<=4n-2<=105
==>97<=7n<=107
==>24.25<=n<=26.75
==>25<=n<=26
if n=25 s=98
if n=26 s=102
7 0
3 years ago
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