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lana [24]
3 years ago
15

Help me out please its urgent

Mathematics
1 answer:
NemiM [27]3 years ago
5 0

Answer:

B, E, H

Step-by-step explanation:

B. Pi is the circumference of a circle of diameter 1

E. Pi is the area of a circle of radius 1

H. Pi is the constant of proportionality relating the diameter of a circle to its circumference."

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1. The sum of first n terms of an arithmetic sequence is 3n²+4n
valentina_108 [34]

Answer:

<h3>           a.  a₁=7,     b.  a_n=7n+1,    c.  a₂₀=141</h3>

Step-by-step explanation:

a.

 a_1=S_1=3\cdot1^2+4\cdot1=3+4=7

b.

   a_1+a_2=S_2\\\\a_1+a_1+d=3\cdot2^2+4\cdot2\\\\7+7+d=3\cdot4+8\\\\14+d=12+8\\\\d=6\\\\\\a_n=a_1+d(n-1)\\\\a_n=7+6(n-1)\\\\a_n=7+6n-6\\\\\underline{a_n=7n+1}

c.

 a_{20}=7\cdot20+1=141

5 0
3 years ago
Please help me find the slope
hjlf

Answer:

the slope is 2

Step-by-step explanation:

rise/run 4 rise run 2 simply and you get just 2

8 0
3 years ago
Read 2 more answers
You lose 5 points for every wrong answer in a trivia game. What integer represents the change in your points after answering 8 q
nata0808 [166]
Your answer would be -40. :-)
4 0
4 years ago
Evaluate the expression
Oksanka [162]

answer: I think the result is 12

Step-by-step explanation:

c(b+a)-a=

2(3+6)-6=

6+12-6= 12

6 0
2 years ago
A particular dishwasher uses 444 gallons of water per load. Their advertising claims that hand washing the dishes uses 666 times
balu736 [363]

Answer: 6.35444444×10^13 gallons

Step-by-step explanation:

So a dishwasher uses 444 gallons of water per load.

That means it'll use 444*215215215 = 95555555460 gallons of water for 215215215 loads

Since washing dishes by hand takes 666 as much as water in comparison to using a dishwasher, we can do 95555555460x666 to find that you need 6.36399999×10^13 gallons of water to wash 215215215 loads.

The question asks for how much more water in gallons you can save, so do 6.36399999×10^13 - 95555555460 to get 6.35444444×10^13 gallons

8 0
2 years ago
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