If the exponent is odd, the product would be odd. If the exponent is even, the product would be even because:
(-1)(-1)=1
However, (-1)(-1)(-1)= -1
So, we know this:
<span> 5x+10y = 800
and we also know that the number of larger vehicles was 50.
So we can substitute:
</span>
<span>5x+10y = 800
</span>
<span>5x+10*50 = 800
and calculate:
</span><span>5x+500 = 800
and now subtract 500 from both sides:
5x=300
and divide by 5:
x=60.
and this is our answer: there were 60 smaller vehicles washed!
</span>
To avoid distortion of extreme
values, a good indicator would be the
B. median.
The following equations should be the true choices to solve for this.
x + y = 86 (total number of items)
2x + 5y = 330 (total cost)
Answer:
y=90(0.5)^x
The y-intercept is (0,90), so when x=0, y should be 90.
By replacing x=0 in all equations you get;
1)
y=90(2)^0 =90 accepted
2)
y=2(90)^0 =2 rejected
3)
y=0.5(90)^0 =0.5 rejected
4)
y=90(0.5)^0 =90 accepted
Since this is an exponential decrease,
y=90(2)^x is rejected.