1) F + (N - 1)*D=Nth Term, where F=First term, D=Common difference and N=Number of terms.
-1 + (8 - 1)*D =20, solve for D
-1 + 7D = 20
7D = 20 + 1
7D =21 divide both sides by 7
D = 21 / 7
D = 3 Common difference
2)
(F + L) / 2*N, where F=First term, L=Last term and N=Number of terms.
Sum = (-7 - 115) / 2*13
Sum =( -122 / 2) * 13
Sum = -61 * 13
Sum = -793
Anything divided by 5 is the same as multiplying by 0.2, so double it and divide it by ten -2.4
Answer:
When multiplying a number by 10, move the decimal to the right. Whenever a number is multiplied by 10, the decimal is shifted to one place in the right.
Like :
When multiplying a number by 0.1, move the decimal to the left. This means the number is multiplied by or we can say the number is simply divided by 10.
So, when a number is divided by 10, the decimal is shifted to one place on the left.
Like :
or
Your price for this TV with its tax will be 965.24 dollars
0.5 and 300 represent the number of milligrams of the substance.