Answer:
(–3, –4)
Step-by-step explanation:
Given pair of linear equation
-4x+y = 8
=> y = 8 + 4x _____(1)
x - 5y = 17 (2)
substituting value of y from equation 1 in equation 2 we have
x - 5(8 + 4x) = 17
=> x - 5*8 -5*4x = 17
=> x - 40 - 20x = 17
=> -40 - 19x = 17
=> -19x = 17+40 = 57
=> x = 57/-19 = -3
Thus, x = -3
y = 8 + 4x = 8 +4(-3) = 8 -12 = -4
Thus, y = -4
Hence, paired solution for given equation is (–3, –4).
Answer:
is not polynomial.
Step-by-step explanation:
We have been given an expression . We are asked to determine whether the given expression is polynomial or not.
We know that a polynomial expression is in form , where n is a non-negative number and a is a constant.
Upon looking at our given expression, we can see that it has a negative exponent.
Since exponents in polynomials must be positive, therefore, our given expression is not a polynomial.
Answer:
x = 6
Step-by-step explanation:
Using the rules of logarithms
• log x - log y ⇔ log ( )
• x = n ⇔ x =
Given
log(5x) - log(x - 3) = 1
log ( ) = 1, then
= = 10 ( cross- multiply )
10(x - 3) = 5x
10x - 30 = 5x ( subtract 5x from both sides )
5x - 30 = 0 ( add 30 to both sides )
5x = 30 ( divide both sides by 5 )
x = 6
Answer:
7 3/4
Step-by-step explanation:
-5/8 + 8 3/8
= -5/8 + 7 11/8
= 7 6/8
Simplify
7 3/4