Take a ruler and use it to measure ur stick and theres ya answer to how long
1.5x+4y=16
5x+4(-16)=16
5x-64=16
5x=80
x=16
2.3x+6y=15
-2x+3y=-3
Multiply the 2nd equation by 2
3x+6y=15
-4x+6y=-6
7x=9
x=9/7
3x+6y=15
3(9/7)+6y=15
27/7+6y=15
6y=78/7
y=78/42 or 39/21 or 13/7
3.7y = -14x + 42
<span>7y = 14 x + 14
-14x+42=14x+14
-28x=-28
x=1</span>
Answer:
1950 seconds
Step-by-step explanation:
if sixty seconds are in a minute, then you just multiply 32, the number of minutes by the number of seconds in a minute and add 30.
Answer:
This will be the sum of a geometric series where the first term is 4
The common ratio is -5
And we will have 6 terms.....so....the sum is
first term [ 1 - common ratio^number of terms ] / [ 1 - common ratio ] =
4 [1 - (-5)^6] / [ 1 - -5 ] =
4 [ 1 - 15625 ] / 6 =
(2/3) ( -15624 ) =
-10416
Step-by-step explanation:
Answer:
20,000 particles
Step-by-step explanation:
Here we are given that the amount if radioactive particles has come down to 40,000 from 80,000 in 80 years . Hence by the definition of Half Life,the half life of the item is 80 years.
Now we are asked to guess the number of radioactive particles after 80 years. As we already know that , the half life of material is 80 years , the number of radioactive particles will be reduced to its half in 80 years. Hence the number of radioactive particles after 80 years is 20,000
