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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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quester [9]

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<h3>What is the parabola?</h3>

It's the locus of a moving point that keeps the same distance between a stationary point and a specified line. The focus is a non-movable point, while the directrix is a non-movable line.

The equation of a quadratic function, of vertex (h, k), is given by:

y = a(x – h)² + k

where a is the leading coefficient.

The equation of the parabola will be

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The given parabola is a downward parabola which is passing through origin and leading coefficient of the negative 2.

The graph of the function is given below.

More about the parabola link is given below.

brainly.com/question/8495504

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4 0
2 years ago
Yesterday I ran 9.6 miles at an average speed of 0.4 miles per 5 minutes. How long did it take me to run the 9.6 miles?​
Sati [7]

Answer:

2 hours

Step-by-step explanation:

9.6/(60/5 x 0.4) = 2 hours

/ = divide

x = multiply

3 0
3 years ago
Danielle bought a house for $215,000. She financed $189,375 of the purchase price with a 15-year-fixed-rate mortgage with a 6.1%
Brilliant_brown [7]
Total cost of the house = $215,000
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Monthly payment, M = P[i(1+i/12)^12*15]/[(1+i/12)^12*15 -1] = 189,375[0.061/12(1+0.061/12)^12*15]/[(1+0.061/12)^12*15 - 1] = $1,608.30
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Seems the options given don't match the correct answer.
4 0
3 years ago
How to solve this using trigonometry?
Leya [2.2K]
Using SOHCAHTOA and Kenui's height and angle of depression (which is the downward angle from the horizontal ) the answer should be:  

because its the Adjacent and Opposite sides use Tan;  
Tan(6.8) = o/a
tan(6.8) = Distance / 219
tan(6.8)(219 = Distance 
26.114 m 

But because the angle of depression is the downward angle from the horizontal the answer may be Tan(83.2)(219) = 1836.589
the 83.2 coming from 90 degrees - 6.8 degrees 

either way i"m still unsure because I don't see a need for the two angles or Mias involvement, sorry if I'm wrong  


8 0
3 years ago
How many times greater is the capacity of one gallon than one quart
Oxana [17]
1 gallon = 4 quarts
8 0
3 years ago
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