What is the equation of the line that passes through the points (-4,1) and (4-1)
1 answer:
Answer:
y=-1/4x
Step-by-step explanation:
METHOD 1: The basic slope-intercept equation is <em>y=ax+b</em>. To achieve the slope with two points, this is the equation:
All you have to do is insert points (-4, 1) and (4, -1) into their corresponding locations.
With this equation, you will be able to find the slope. Then you can simply graph it to connect the two dots.
METHOD 2: Simply connect the two dots with a straight line (use a ruler or something with a straight edge.) Then count how many spaces up/down and left/right. If the line goes from top to bottom from left to right, it is a negative slope (hence, the -1/4.)
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Answer:
Step-by-step explanation:
1. x^2 + 6x = 5
x^2 + 6x + 9 = 14
(x+3)^2 = 14
x = - 3
2. x^2 + 8x -4 = 0
x^2 + 8x = 4
x^2 + 8x + 16 = 20
(x+4)^2 = 20
x = - 4
Answer:
$16000 invested in 4.25% and 16000 invested in 6.25%
Step-by-step explanation:
Let x be the amount invested in 4.25% and y be the amount invested in 6.25%
4.25%= 0.0425
6.25%= 0.0625
subtract x from both sides
total interest earned is 1680
Now solve for x and y
subtract 2000 from both sides
divide by -0.02 from both sides
x=16000