If the following system of equations was written as a matrix equation in the form ax=c , and matrix a was expressed in the form

a=[acbd]
find the value of a-b+c+d
4x + 2y=7
5x-6y=9

The given system of equations are :

4x + 2y=7

5x-6y=9

a   c       we have   4     2

b     d                       5      -6.

Comparing the two matrix we have a=4,b=5,c=2,d=-6

The question is asking us to find the value of a-b+c+d

Substituting the values of a,b,c,d we have:

a-b+c+d=4+(-5)+2+(--6)

=4-5+2-6=-11.

sorry not sure

step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5