Answer:
1. 5
2. 5
3. -3
4.y= -1
5. 5
Step-by-step explanation:
1.)x- 2y= -25 ; y=3x
x-2(3x)=(-25)
x-6x=(-25) ; -5x=(-25) ; x=5
2.) 5x+3y =40; x=y
8y=40; y=5
3.) 4x-3y= -27; x=3y
4(3y)-3y= -27; 12y-3y=-27; 9y=-27; y=-3
4.)x-y=9; x=-8y; -8y-y=9; -9y=9; y=-1
5.) 2x+2y=30; y=2x ; 2x+2(2x)=30; 6x=30; x=5
Equation : 2x - 3 = 45
Paula sold 24 packages last year
Step-by-step explanation:
<u>DATA:</u>
Number of packages Paula sold this year = 45 packages
This year's packages are 3 less than twice the number of packages sold last year.
- Twice the number of packages sold last year
Let's assume the number of packages sold last year to be x
2x
Equation:
2x - 3 = 45
<u>Solution:</u>
2x - 3 = 45
2x = 48
x = 24
Therefore, Paula sold 24 packages last year.
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Which expression? Are you looking for a general form answer?
Answer:
0
Step-by-step explanation:
The slope formula is ...
m = (y2 -y1)/(x2 -x1)
Filling in the given point values, we find the slope to be ...
m = (-4 -(-4))/(9 -5) = 0/4 = 0
The slope is 0.
_____
The y-values are the same at -4, the equation of the line is y = -4. It is a horizontal line with zero slope.
Answer:
214.58(meters/minute)
Step-by-step explanation:
v = [250/2 + 1000/4 + 350/1 +400/3]/4=214.58(meters/minute)