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Monica [59]
2 years ago
5

Write exponential equation for geometric sequence where t(1)=140 and t(2)=98

Mathematics
1 answer:
ser-zykov [4K]2 years ago
4 0

Step-by-step explanation:

common ratio r = 98/140

first term a = 140

geometric sequence formula is an = ar^(n-1)

an = 98^(n-1)

where n is the number of terms in the sequence

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Please Explain how you got your answer!
marysya [2.9K]

Answer:

  19 miles

Step-by-step explanation:

Let m represent the number of miles traveled. Then the delivery charge is ...

  charge = $5.00 + $0.15·m

You want to find the value of m that makes the charge by $7.85, so you want the solution to ...

  $7.85 = $5.00 +$0.15·m

  $2.85 = $0.15·m . . . . . . . . . subtract $5 (this gives the mileage charge)

  $2.85/$0.15 = m = 19 . . . . . divide by the coefficient of m

The number of miles traveled is 19.

6 0
3 years ago
Under certain conditions the pressure of a gas varies directly with the temperature. When the pressure is 900 psi, the temperatu
Crank

Answer:

180psi

Step-by-step explanation:

Step one:

given data

P1= 900 psi

T1= 350°C

P2=?

T2=70°C

Required

The final pressure P2

<em>Gay-Lussac's Law: The Pressure Temperature Law. This law states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. With an increase in temperature, the pressure will go up</em>

Applying the expression

P1/T1= P2/T2

substitute:

900/350= P2/70

2.57=P2/70

cross multiply

P2= 2.57*70

P2=180psi

8 0
3 years ago
Maths<br> Share £72 in the ratio 2:7
avanturin [10]
2+7= 9 
72 / 9 = 8
8 * 2 = 16
<span>8 * 7 = 56 
</span>16:56
<span>
Key: 
</span>* = times
<span>/ = divide</span>
5 0
3 years ago
PLZ HELP QUICK PLZ
olya-2409 [2.1K]

Answer:

hope this helps you

5 0
3 years ago
The sum of two numbers is 12. The first number,X, is twice the second number,y, which system of equations could be used to find
koban [17]

Answer:

y=4, x=8

Step-by-step explanation:

system:

x+y = 12, x=2y

convert to 1 variable, simplify:

2y+y=12

3y=12

y=4

x=2y=4*2=8

6 0
3 years ago
Read 2 more answers
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