First you need to subtract the amount she already has, 105, from the amount she needs, 345, to get 240. Then you know she saves 20/month so you divide 240 by 20 to get 12. If she saves 20/month it will take her 12 months to have enough to buy the stereo. Hope this helps!
<u>Answer:</u>
slope = 1.5 , y-intercept = 12 , equation = y = 1.5x + 12
<u>Explanation:</u>
- here we can see the line intersecting the y-axis at 12. this is y intercept.
- to find slope: find two best coordinates: ( 0 , 12 ) , ( 4 , 18 )
- now use the formula to find slope:
: 
: 
is the slope of the line
- equation formula: y = mx + b .......where m is slope and b is y intercept
y = 1.5x + 12
Answer:
y= 49/5 <em>or</em><em> </em>9 4/5 <em>or</em><em> </em>9.8
Step-by-step explanation:
So you have a rod, laid flat in front of you like this:
==================
The density of this rod varies Linearly from the left end to the right end. That means that the density increases by a constant amount from one end of the rod to the other, and therefore and density along the rod can be found using a linear equation.
On one side of the rod the density is 5 and on the other the density is 17. The rod is ten feet long. So every 10 feet, the density increases by 17-5 which equals 12. We can simplify this and say that every five feet the density increases by six, because ten and twelve are both divisible by two, and this is a linear equation. So y=6/5x+5 where Y is the density of the tube and X is the distance from the left end of the tube. We add the +5 to the "x" side of the equation because at a distance of zero feet from the left end of the rod the density is already 5, and then goes up by 6/5x from there. So if you want to find the density four feet from the left side of the rod, you let x equal four. y=6/5(4)+5 and simplify.
y=6/5(4)+5
=24/5+5
=49/5 <em>or</em><em> </em>9 4/5 <em>or</em><em> </em>9.8
Answer:
N/7 - 10 < -6
N/7 < 4
N < 28
Step-by-step explanation: hope it helps
By factoring, find two values j and k which satisfy two conditions, jk=ac=-12 and j+k=b=-4, so j and k must be 2 and -6 so the factors are:
(x+2)(x-6)=0
So x=-2 and 6
By the quadratic formula, x=(-b±√(b^2-4ac))/(2a), in this case:
x=(4±√(16+48))/2
x=(4±√64)/2
x=(4±8)/2
x=2±4
x=-2 and 6
