Solve S=lw+wh+lh for h
Answers
Answer:
Solve the equation.
h
=
S
−
l
w
w
+
l
Step-by-step explanation:
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Is 3.61 less than 3.87
How do u do this step by step
Answers
(2, 0)
(–1, –5)
(3, 25)
2.on which of the following lines does the point (7, 1) lie
A. y - 5x = 4
B.y = x - 10
C. y=-4x + 3
D. y= -x + 8
3.Find the slope of the line through (-9, -10) & (-2, -5)
A -5/7
B 7/5
C 5/7
D -7/5
Answers
(2, 0)
Answer to part 2 is:
D. y= -x + 8
Answer to part 3:
C; 5/7
Answers
Answer:
The original price was $5
Step-by-step explanation:
100% - 40% = 60% =0.6
So the discounted price is 60% of the original price
3 = 0.6 X
30 = 6x
x = 5
Answers
Answer
Find out the speed of the boat in still water .
To proof
Let us assume that the speed of the boat in still water be u .
As given
The speed of a stream is 4 mph
hence
speed upstream = u - 4
speed downstream = u + 4
Formula
As given
A boat travels 8 miles upstream in the same time it takes to travel 16 miles downstream.
First case for the upstream
Second case for the downstream
now compare the equations
simplify the equation
8( u +4 ) = 16 (u -4)
8u +32 = 16u - 64
8u = 96
u = 12 mph is the speed of the boat in still water .
Hence proved
The speed of the stream = 4 mph.
Let us assume speed of the boat in still water = x mph.
Total speed upstream = (x-4) mph.
Total speed downstream = (x+4) mph.
We know, time, speed and distance relation.
Time = Distance / Speed.
Total time taken upstream = 8 / (x-4)
Total time taken downstream = 16/(x+4).
Time taken upstream = time taken downstream.
Therefore,
8 / (x-4) = 16/(x+4).
On cross multiplication, we get
16(x-4) = 8(x+4).
16x - 64 = 8x +32.
Adding 64 on both sides, we get
16x - 64+64 = 8x +32+64
16x = 8x + 96.
Subtracting 8x from both sides, we get
16x-8x = 8x-8x + 96.
8x = 96.
Dividing both sides by 8, we get
x = 12.
Therefore, 12 mph is the speed of the boat in still water.
Answers
x means unknown so
x+-1=+1
adding a negative means subtraction
x-1=1
you can do anything to an equation as long as you do it to both sides
add 1 to both sides
x+1-1=1+1
x+0=2
x=2
the number is 2
Answers
Percentage of T-shirt that were blue = 20%
Then Number of T-shirt that were blue in color = (20/100) * 30
= 2 * 3
= 6
Number of T-shirts that were black in color = (1/2) * 30
= 15
Then
The total number of T-shirts that were black and blue = (15 + 6)
= 21
Then
The total number of T-shirts that were neither black nor blue = 30 - 21
= 9
So the number of T-shirts that were neither black nor blue was 9.