Solve the system using elimination. x + 2y = –6 3x + 8y = –20 (–4, –1) (–4, 4) (–1, –4) (3, 1)

 The required solution is  x = -4  and  y = -1.

Step-by-step explanation:  We are given to solve the following system of equations by the method of Elimination :

Multiplying equation (i) by 3 , we have

Subtracting equation (iii) from equation (ii), we get

From equation (i), we get

Thus, the required solution is  x = -4  and  y = -1.

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

a. she will receive a refund of $278.

step-by-step explanation: