Answer:
There are no solutions.
Step-by-step explanation:
Let's solve your inequality step-by-step.
−7(3x−7)+21x≥50
Answer:
x² + 4x + 20 = 12x - 5
x² + 4x - 12x + 20 + 5 = 0
x² - 8x + 25 = 0
Δ = √b² - 4ac
= √(-8)² - 4×1×25
= √64-100
= √(-36)
x ∉ R
Answer:

Step-by-step explanation:
Given



Required
Determine the change received
First, we need to calculate the total amount spent


This implies that Natalie pays a total of $41.18
Next, we calculate the change as thus:



<em>Hence, the change is $8.82</em>
It should be 3.25
S is half the perimeter, so .5*(7+5+10)=11
Plug in 11 and you get A=sqrt(264)
A also is half base times height
sqrt(264)=.5*10*h
h=sqrt(264)/5
h=3.25