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iogann1982 [59]
3 years ago
7

1 3/8 divided by 2 1/2

Mathematics
1 answer:
NikAS [45]3 years ago
6 0
The answer is 2 1/5 because 1 3/8 is =11/8 TIMES 2/5 IS 2 1/5
hope it helped.
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The length of the midsegment of a triangle is always half the length of the side it is parallel to true or false
Vladimir [108]
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This means half the height will give half the base (midsegment). So the midsegment is always half the length of the side it's parallel to.
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Definition of tendon
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the hamstring of a quadruped.

Step-by-step explanation:

4 0
3 years ago
A boat travels at 15 km/hr in still water. In travelling 45 km downstream from town A to town Bit completes the journey in 75 mi
Crank
Let the speed of river be x   km/hr down stream.

Time = Distance / speed

Since river flows downstream,  speed of boat down stream = Speed of boat + speed of river =  (15 + x).

 Since river flows downstream,  speed of boat upstream = Speed of boat - speed of river =  (15 - x).

Time Upstream - Time Downstream = 75 minutes

Time Upstream =  45 / (15 - x)

Time Downstream =  45 / (15 + x)

75 minutes = 75/60  =  5/4 hours

Time Upstream - Time Downstream = 75 minutes = 5/4 hours

45 / (15 - x)    -    45 / (15 + x)  = 5/4          Divide both sides by 45

1 / (15 - x)    -    1 / (15 + x)  = (5/4)*(1/45)

 1 / (15 - x)    -    1 / (15 + x)  = 1/36

((15 + x) - (15 -x)) / (15-x)(15+x)  = 1/36

(15 +x - 15 +x) / (15-x)(15+x)  =  1/36

  2x / (15-x)(15+x)  = 1/36

 (15-x)(15+x) = 2x*36

(15-x)(15+x) = 72x

225 - x² = 72x

0 =  x² + 72x -225

x² + 72x -225 = 0            This is a quadratic function, use a calculator that can solve the function, by inputting the function.

x = 3, or -75.  Since we are solving for speed, we can not have negative values.

x = 3 is the only valid solution.

Speed of the river =  3 km/hr  downstream.

Copyright.
7 0
4 years ago
- 1/2 (-3/2x + 6x +1) -3
Tcecarenko [31]
-1/2(-3/2x + 6x + 1) - 3

Simplify.

(3/4x - 3x - 1/2) - 3

Get rid of the parenthesis.

3/4x - 3x - 1/2 - 3

Add like terms.

(3/4x - 3x) + (-1/2 - 3)

Simplify.

-2 1/4x + (-3 1/2)

Get rid of the parenthesis.

-2 1/4x - 3 1/2

Hope I helped! :)

4 0
4 years ago
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