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sergejj [24]
2 years ago
13

in a biology course, students spend 250 minutes in a lab and lecture each week. the lab time is 20 minutes shorter than the lect

ure time. let x= the number of minutes the students spend in lecture​
Mathematics
1 answer:
Luden [163]2 years ago
6 0

Answer:

The students spent 135 minutes in lecture and 115 minutes in a lab.

Step-by-step explanation:

Let x and y be the respective amount of time students spent in lecture and lab.

x-20=y --- eqn 1

x+y=250 --- eqn 2

From eqn 1, x=y+20 --- eqn 3

Sub eqn 3 into eqn 2:

y+20+y=250

       2y=230

         y=115

Sub y=115 into eqn 3:

x=115+20

 =135

∴x=135, y=115

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<h3>What is the correct statement about the place?</h3>

Barrier islands are called “barrier islands” due to the fact that they are good means of creating barrier between the mainland and the ocean.

Now, these barrier islands tend to shelter and protect the mainland from the powerful forces of wind, waves, and other natural disasters.  This they do by;

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