X^2+11x+18<0 ----- Subtract 18 from both sides
(x+2)(x+9)=0-------- Factor the left side
------Set factors equal to zero
Your answer is -9<x<-2
Answer:
Answer attached
Step-by-step explanation:
X ≤ <span>− 3; First solve for the (), so </span><span><span>−<span>9x</span></span>−6</span>≥<span><span>−<span>3x</span></span>+12. Then you combine </span>Add 3x to both sides: <span><span><span>−<span>9x</span></span>−6</span>+<span>3x</span></span>≥<span><span><span>−<span>3x</span></span>+12</span>+<span>3x</span></span><span><span><span>−<span>6x</span></span>−6</span>≥<span>12
Same for 6 : </span></span><span><span><span>−<span>6x</span></span>−6</span>+6</span>≥<span>12+6</span><span><span>−<span>6x</span></span>≥18
</span><span>Divide both sides by -6; Your done!</span>
Answer:
Step-by-step explanation:
Let q represent the number of quarters. Then Tony's coin value is ...
0.25q +0.10(25 -q) = 4.00
0.15q +2.50 = 4.00 . . . . . . . . eliminate parentheses, collect terms
0.15q = 1.50 . . . . . . . . . . . . . . subtract 2.50
q = 10 . . . . . . . . . . . . . . . . . . . . divide by the coefficient of q
Then the number of dimes is ...
25 -10 = 15
Tony has 15 dimes and 10 quarters.
We get 65 miles away from Pittsburgh each hour, but we also started 80 miles away. Thus, our formula for dd is dd = 65tt + 80
