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vampirchik [111]
4 years ago
9

Which ordered pair is the best estimate for the solution of the system of equations? y = −1/5x + 1 y = x + 4

Mathematics
1 answer:
SVEN [57.7K]4 years ago
7 0
Given system of equation:
y=-1/5x +1 Equation 1
y=x+4 Equation 2
Substitute value of y in equation 2.
x+4=-1/5x+1
Multiply both sides by 5.
5x+20=-x+5
Add x to both sides
6x+20=5
Subtract 20 from both sides
6x=-15
x=-15/6
x=-5/2
Now substitute value of x in equation 1.
y=-1/5 ( -5/2) +1
y=1/2+1
y=3/2

Solution is (x,y)= (-5/2 , 3/2)
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3 years ago
Differentiate f and find the domain of f. (enter the domain in interval notation.)f(x) = ln(x2 − 12x)derivative f '(x) = 2x−12x2
guajiro [1.7K]
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Answer:
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The domain is
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3 0
3 years ago
1. 5 less than one fourth of x is y.
horsena [70]

Answer

y = (1/4)x - 5                 or     4y - x + 20 = 0

Explanation

To get the rule required, we interpret the sentence and write it in a mathematical form.

5 less than one fourth of x is y  

one fourth of x ⇒ (1/4)x

5 less than one fourth of x is y  ⇒  (1/4)x - 5 = y

y = (1/4)x - 5

4y = x - 20

4y - x + 20 = 0

6 0
3 years ago
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