9 - x² < 0
<u>-9 -9</u> <u> </u><u /> to remove 9 deduct it from both sides<u></u>
- x² < -9
<u> ÷ -1 ÷-1 </u> to remove the negative sign, divide both sides by -1
x² < 9
<u> √x² < √9</u> to remove the exponent of 2, find the square root of both sides.
x < 3 Choice A.
To check:
9 - x² < 0
9 - 3² < 0
9 - 9 < 0
0 < 0
Answer:
why did you delete my answer??????
Step-by-step explanation:
So here is the answer.
We represent h = hardwood and p = pine bark
Here is the equation: h + p = 176
2.75p + 3.50h = 520
Next, p = 176 -h (substitute)
2.75 (176-h) + 3.5h = 520
484 -2.75h + 3.5h = 520
3.5h-2.75h = 520 -484
0.75h = 36 (divide both by 0.75)
h = 48
Therefore, the number of hardwood sold is 48.
h + p = 176
p = 176-48
p= 128
The number of pine bark sold is 128.
Hope this helps.