Write a system of equations and solve using elimination. ricardo has two bills. the two bills together are $21. one bill is worth $19 more than the other. what are the two bills?

The worth of one bill is $20 and the worth of the other bill is $1

Step-by-step explanation:

Let

x> the worth of one bill

y ---> the worth of the other bill

I assume x > y

we know that

x+y=21 > equation A

x=y+19 ---> equation B

Solve the system by elimination

Multiply equation B by -1 both sides

-x=-y-19 > equation C

Adds equation A and equation C

x+y=21

-x=-y-19

y=21-y-19

2y=2

y=1

Find the value of x

x=y+19 > x=1+19=20

therefore

The worth of one bill is $20 and the worth of the other bill is $1

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: