So what you do first is find the area of this lawn and you do 10 by 12 and multiply those and you get 120 feet so now what you do is divived 120 by 3 and you get 40 so that means she mowed 40 ft in each hour so that would be the unit rate.
Answer:
Step-by-step explanation:
Given is a function as
Equating to 0 we have equation
If the function f(x) has x intercepts then the solutions are real
Let us use remainder theorem and change of signs rule
f(0) = 1>0
f(-1) = -1+3+1=3
f(-2) = -32+6+1<0
This implies there is a real root between -1 and -2.
f(1) = -1
Since f(0) and f(1) have different signs, there exists a real root between 0 and 1.
f(2) = 32-6+1>0
Since f(1) and f(2) have different signs there exists a real root between 1 and 2.
Thus there are definitely three real solutions as
one between -1 and 0, one between 0 and 1, and third between 1 and 2.
The given system of equations is :
x−y=−11 ...(1)
y+7=−2x ...(2)
First step is to solve equation (1) for x so that we can substitute that x in equation (2) to get the value of y. So, add y to each sides of equation (1). Hence,
x = y - 11.
Next step is to plug in y - 11 for x in equation (2). So,
y + 7 = -2(y - 11)
y + 7 = -2y + 22 By distribution property.
y + 7 - 7 = -2y + 22 - 7 Subtract 22 from each sides.
y = -2y + 15
y + 2y = -2y + 15 + 2y Add 2y to each sides of the equation.
3y = 15
Divide each sides by 3.
So, y = 5.
Hello!
The answer is 96 words.
He can type 32 words every 30 seconds, 64 words for 60 seconds or 1 minute and 96 words for 90 seconds.
:)
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