We can solve this using substitution.
because x-y=2.5
x=y+2.5
Now substitute x into other equation.
2(y+2.5)^2-2y=125
2y^2+10y+12.5-2y=125
2y^2+8y-112.5=0
Now comes the ugly part
y=-4+-sqrt(16+900)
y=-4+-sqrt916
y=-4+-2sqrt229
x=-1.5+-2sqrt229
Answer:
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Step-by-step explanation:
erw
The value of the constant k when the value of x and y is 7 and 3 respectively in the equation xy=k is 21.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The value of the constant k when the value of x and y is 7 and 3 respectively in the equation xy=k can be written as,
Hence, the value of the constant k when the value of x and y is 7 and 3 respectively in the equation xy=k is 21.
Learn more about Equation:
brainly.com/question/2263981
Answer:
Amount of peanut butter each student get = 533.34 gram (Approx.)
Step-by-step explanation:
Given:
Amount of peanut butter Mr black has = 32 kg
Total number of students = 60 students
Find:
Amount of peanut butter each student get
Computation:
Amount of peanut butter Mr black has = 32 kg
Amount of peanut butter Mr black has = 32 x 1,000 gram
Amount of peanut butter Mr black has = 32,000 gram
Amount of peanut butter each student get = Amount of peanut butter Mr black has / Total number of students
Amount of peanut butter each student get = 32,000 / 60
Amount of peanut butter each student get = 533.33
Amount of peanut butter each student get = 533.34 gram (Approx.)
