Answer:
(a)
(b)
Step-by-step explanation:
(a) For using Cramer's rule you need to find matrix and the matrix for each variable. The matrix is formed with the coefficients of the variables in the system. The first step is to accommodate the equations, one under the other, to get more easily.
To get , replace in the matrix A the 1st column with the results of the equations:
To get , replace in the matrix A the 2nd column with the results of the equations:
Apply the rule to solve :
In the case of B2, the determinant is going to be zero. Instead of using the rule, substitute the values of the variable in one of the equations and solve for :
(b) In this system, follow the same steps,ust remember is formed by replacing the 3rd column of A with the results of the equations:
Answer:
B
Step-by-step explanation:
20pounds/day * 14days * 20horses
Let set C = {1, 2, 3, 4, 5, 6, 7, 8} and set D = {2, 4, 6, 8}.
g100num [7]
<span>1. If it is intersection then it SHOULD be included in both the sets right?
Now we know that odd numbers from 1-100 but the second set are multiples of 5 from 50-150! So we mainly need to look for common numbers which are ODD and are a MULTIPLE OF 5 BETWEEN 50 - 100!!
So
A={51,53,57,59,61......99}
B={55,60,65,70.......95} [We stop till 100 because set A has no such element]
So what is A ∩ B here?
A ∩ B = {All odd numbers and multiples of 5 between 50 - 100}
</span>