20) You put $1000 in an account. The account earns $100 simple interest in 4 years. What is the annual interest rate?
a) 3.5%
b) 2.5%
c) 7.8%
d) 4.2%
HELP PLEASE

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

77

step-by-step explanation: