1. K=4*2 2. No
Step-by-step explanation:
This is because to get our answer, we must do 4 times 2 to get our orginal answer. If Tisha got half of the strawberries and half is four, then it is impossible to start off with 6 because Keenan must of started wiht 8 strawberries. This math should be very simple
Answer:
$1719.55, 61.4%
Step-by-step explanation:
Original price of stove: $2,800
Value of stove after 1 year: (1 - 0.15)($2,800), or 0.85($2,800) = $2,380
Value of stove after 2 years: 0.85($2,380) = $1719.55
Find the ratio of this last result to the original price and convert that to a percentage:
$1,719.55
-------------- = 0.614, or approximately 61.4%
$2,800
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:
Is irrational
Step-by-step explanation:
Let be a rational number, and be an irrational number. If their sum were rational, say , then we'd have
but is the difference between two rational numbers, and thus a rational number. But it also equals , which is irrational by hypothesis. Since we have a contradiction, we conclude that the sum of a rational and an irrational can't be rational.
F (x)= (x+1)(x-1)(x^2-2x-2)