Before we get started, it is good to remember PEMDAS - the acronym that tells you the order to carry out equations.
P = parentheses
E = exponents
M = multiplication
D = division
A = addition
S = subtraction
Knowing this, we should start by doing the equations <em>within </em>each parentheses.
![(2) *(10)](https://tex.z-dn.net/?f=%282%29%20%2A%2810%29)
So we did the addition and subtraction pieces within each group leaving us with the above equation. Now let's multiply:
![(2)*(10) = 20](https://tex.z-dn.net/?f=%282%29%2A%2810%29%20%3D%2020)
20 is the answer.
Answer:
(d) a1 = 11
Step-by-step explanation:
Put the numbers in the given formula and solve for a1.
a5 = 176 = a1(r^(5-1)) = a1·r^4
a7 = 704 = a1(r^(7-1)) = a1·r^6
Dividing a7 by a5 gives ...
a7/a5 = (a1·r^6)/(a1·r^4) = r^2 = 704/176 = 4
Then a1 is ...
a1 = a5/(r^4) = 176/(r²)² = 176/(4²) = 11
The first term is 11.
8 5/6, 8.839, 177/20, 8.99
Answer:
19
Step-by-step explanation:
105+4d-1=180
104+4d=180
4d=76
d=19