Answer:
1. x = 30
REC = 130
Step-by-step explanation:
2x + 70 = 4x + 10
60 = 2x
x = 30
you try the others
Good luck :D
I think the answer is D.348
Answer:
a =12*sqrt(2)
Step-by-step explanation:
3. The Pythagorean theorem states
a^2 + b^2 = c^2 where a and b are the legs and c is the hypotenuse
a^2 +21^2 = 27^2
a^2 +441 =729
Subtract 441 from each side
a^2 +441-441 = 729 -441
a^2 =288
Take the square root of each side
sqrt(a^2) = sqrt(288)
sqrt(xy) = sqrt(x)sqrt(y)
a = sqrt(144)sqrt(2)
a =12*sqrt(2)
Perpendicular lines have opposite, reciprocal slopes.
For example, if one line had a slope of 4/5, then a perpendicular line would have a slope of -5/4.
The slope-intercept equation for a (non-vertical) line is:
y = mx + b
where m is a number representing the slope of the line and b is a number representing the y-intercept of the line.
We know already that m = -3/2 for our perpendicular line.
Also, our line will have the same x-intercept as the given line. We should probably find that point.
We can do that by setting y= 2/3x-6 equal to 0 and solving for x.
0 = 2/3x - 6
6 = 2/3x
6(3/2) = x = 9
The x-intercept is therefore at (x, y) = (9, 0).
Step 2. Determine "b" for our line. So far we have the equation:
y = -3/2x + b
We know this line goes through the point (x, y) = (9, 0). This means that when we plug in 9 for x in the equation of our line, we should get a value for y of 0.
0 = -3/2(9) + b
27/2 = b
Suppose the number of white flowers is x.
The number of pink flowers will be 2x
Given that she planted 3 rows of 4,6 and 8 flowers, then number of white flowers in each row will be as follows:
1 st row.
2x=4
hence
x=4/2
x=2 flowers
2nd row
2x=6
x=6/3
hence
x=3 flowers
3rd row
2x=8
hence
x=8/2
x=4 flowers
