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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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Arisa [49]

Answer:

x=3

Step-by-step explanation:

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3) Divide both sides by -2: -2x/2 = -6/2

4) Once you simplify, you will get x=3

Hope this helps!

Step-by-step explanation:

4 0
2 years ago
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Mazyrski [523]

Step-by-step explanation:

For finding k we'll have to plug in the x-value of the coordinate (3,k) into the equation, and solve for the y:

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y = 4 => k =4

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y = (5/2)x + 7/2 => the gradient is 5/2

3) the condition of perpendicularity is expressed by the following relation:

a * a' = -1

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We need to find  b, and we know that this line passes through A (1,-1):

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The equation will be:

y = (-2/5)x - 3/5.

4) I don't know what that symbol means (pV2).

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2 years ago
Hodaya is drawing a map of the trials in the canyon near her house. She knows that the distance from the first creek crossing to
artcher [175]

Answer:

It would roughly be 7 inches and 1/5 of an inch.

I hope this answer helped you! If you have any further questions or concerns, feel free to ask! :)

Step-by-step explanation:

7 0
3 years ago
Which equation is represented by the graph below?
uysha [10]

That's clearly an exponential shape, like the virus graphs.  

f(0)=-3 from the graph.  Since e⁰=1 this must be the last choice,

Answer: y = eˣ - 4

8 0
3 years ago
A potter use 3/5 of a pound of clay to make a bowl.How many bowls the potter make from 10 pounds.
ololo11 [35]
We are writing proportion:
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4 0
3 years ago
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