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marusya05 [52]
3 years ago
11

Find the sum of the first 8 terms in the sequence?

Mathematics
1 answer:
Darya [45]3 years ago
5 0
We need to find the 8 th term nth term is given as <span><span>an</span>=<span>a1</span>+(n−1)d</span> n=8, d =-4 (common difference) <span><span>a8</span>=<span>a1</span>+(8−1)×d</span> <span><span>a8</span>=1+7×(−4<span>)</span></span>
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If a bottle rotates 140 degrees in 70 minutes, how many degrees will it rotate in 28 minutes
Virty [35]
So find rate
rate=degress in x minutes
rate=140 in 70 minutes
ratiosis 140 to 70
if you wanted to find degrees per minute so you could multiply then do
degreees/1 minute=140/70=14/7=2/1=2 degrees per minute
28 minute times 2 degrees per minute=56 degrees

another way is
140/70=xdegrees/28
solve for x
multipl yboth sies by 28 and simplify
3920/70=x=56
answer is 56 degrees
5 0
3 years ago
Read 2 more answers
Find the variable of each ............
QveST [7]

Answer:

The answer is option d.

To find a we have to first find b

sin 60° = b / 10

b = 10 sin 60°

b = 5√3

sin 30° = b / a

b = 5√3

a = 5√3 sin 30°

a = 10√3

cos 30° = c / a

a = 10√3

c = 10√3 sin 30°

c = 15

cos 60° = d /10

d = 10 cos 60°

d = 5

a = 10√3 , b = 5√3 , c = 15 and d = 5

Hopethis helps.

4 0
3 years ago
F(13)=45,000(0.9)^13
Nadusha1986 [10]

Answer:

About 879.877

Step-by-step explanation:

To find f,

f(13) = 45,000(0.9)^13

13f = 45,000(0.25418658283)

13f = 11438.3962274

f = 879.877

Please tell me I did this the right way, Thanks!

3 0
3 years ago
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Norma-Jean [14]
The answer should be 12x cm power of 2
4 0
3 years ago
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DIA [1.3K]
I hope this helps you

if 2 cm 21 km

9cm ? km

?×2=9×21

?=189÷2

?=94,5 km
8 0
3 years ago
Read 2 more answers
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