Answer:
x=-4 , y=1
Step-by-step explanation:
-x+y=5
x-5y=-9
Add the two equations together to eliminate x
-x+y=5
x-5y=-9
-------------------
-4y = -4
Divide each side by -4
-4y/-4 = -4/-4
y = 1
Now we need to find x
x-5y=-9
x -5(1) = -9
x -5 =-9
Add 5 to each side
x-5+5 =-9+5
x = -4
The value for r is mathematically given as
r<-82
This is further explained below.
<h3>What are inequalities?</h3>
In mathematics, an inequality is a relation that compares two numbers or expressions in a way that is not equal. The most common use is doing a size comparison between two numbers on a number line.
Generally, eighty-two less than r is less than −164 is mathematically given as
r-82 <-164
r<-82
Therefore
r<-82
Read more about inequalities
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Answer:
20.398 miles
Step-by-step explanation:
The total distance ran would be the sum of the distances they ran.
5.12 + 7.278 + 8 = 12.398 +8 = 20.398 miles
Slope intercept formula: y = mx + b where m equals slope and b equals the y-intercept.
Answer: y = -6x + 3
Answer:
3rd option
Step-by-step explanation:
the denominator cannot be zero as this would make the expression undefined.
equating the denominator to zero and solving gives the values that x cannot be.
x² - 7x - 18 = 0 ← in standard form
(x - 9)(x + 2) = 0 ← in factored form
equate each factor to zero and solve for x
x - 9 = 0 ⇒ x = 9
x + 2 = 0 ⇒ x = - 2
then
x = - 2, x = 9 ← are the excluded values