Answer:
x = - 7, x = 
Step-by-step explanation:
Given
2x² + 13x - 7 = 0
Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.
product = 2 × - 7 = - 14 and sum = + 13
The factors are + 14 and - 1
Use these factors to split the x- term
2x² + 14x - x - 7 = 0 ( factor the first/second and third/fourth terms )
2x(x + 7) - 1(x + 7) = 0 ← factor out (x + 7) from each term
(x + 7)(2x - 1) = 0
Equate each factor to zero and solve for x
x + 7 = 0 ⇒ x = - 7
2x - 1 = 0 ⇒ 2x = 1 ⇒ x =
Answer:
= 
Step-by-step explanation:
Using the rule of logarithms
x = n ⇒ x = 
, thus
( ) = - 2, then
=
Answer:
1. B. Blue, because the data points are all close to the line
2. C. about 8
3. B. 17 weeks
4. (Sorry don't know this one)
5. I think its B
6. A. The population is decreasing over time
Step-by-step explanation:
First answer haha~ I think I answered all your questions so far ;)
Answer:
1. 11.2
2. -1.4
3. 12
Step-by-step explanation:
The equation of the line that passes through the points A(8,0) and B(3,7) is
To find the y-intercept, plug into this equation x=0:
Two parallel lines have the same slope, so the equation of the line CD is
This line passes through the point D(5,5), thus
Hence, the equation of CD is
