Answer:
3
Step-by-step explanation:
i Substituted the value ofthe variable into the equation and simplified it.
F(x)=x²+2x-1 and g(x)=2x-4 <span>2f(x)-3g(x)=?
</span>2f(x)=2*(x²+2x-1)=2x²+4x-2
3g(x)=3(2x-4)=6x-12
2f(x)-3g(x)=(2x²+4x-2) - (6x-12)= 2x²+4x-2 - 6x+12 =2x²-2x +10
<em>2f(x)-3g(x) = 2x²-2x +10</em>
The answer is the last one, twelve times the sum of a number plus twenty four.
Lets solve this step by step.
A is not a positive because (-9)*8=-72.
B if positive because -12*(-3)=36. A negative times a negative is a positive.
C is also a positive because (-2/5)*(-4) is a positive.
D is not a positive because like A, one is negative and the other number is positive. A negative times a positive is a negative.
I hope it helped!
Answer:
To calculate how many total miles Rachel runs per minute, setting up a unit rate, that is a rate with a denominator of 1, would be helpful.
Step-by-step explanation:
Use the current problem to determine a rate.
23 minutes/4 miles
Now, set up a unit rate.
1 minute/<em>x </em>miles = 23 minutes/4 miles
To solve for <em>x, </em>we can use simple division strategies. We divide 23 by 23 to receive 1 minute. Likewise, dividing the current milage by 23 would wield the correct unit rate. To do this, divide 4 by 23.
4/23 = 0.1739130434782609
Finally, simplify your answer to receive 0.17.
Therefore, Rachel runs ~0.17 miles per minute. (Note that this answer is only a rounded answer of her actual milage per minute)