![\bf \begin{cases} -2x^2+y=-5\\ \boxed{y}=-3x^2+5\\ ----------\\ -2x^2+\left( \boxed{-3x^2+5} \right)=-5 \end{cases} \\\\\\ -5x^2+5=-5\implies -5(x^2-1)=-5\implies x^2-1=\cfrac{-5}{-5} \\\\\\ x^2-1=1\implies x^2=2\implies x=\pm\sqrt{2}](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Bcases%7D%0A-2x%5E2%2By%3D-5%5C%5C%0A%5Cboxed%7By%7D%3D-3x%5E2%2B5%5C%5C%0A----------%5C%5C%0A-2x%5E2%2B%5Cleft%28%20%5Cboxed%7B-3x%5E2%2B5%7D%20%5Cright%29%3D-5%0A%5Cend%7Bcases%7D%0A%5C%5C%5C%5C%5C%5C%0A-5x%5E2%2B5%3D-5%5Cimplies%20-5%28x%5E2-1%29%3D-5%5Cimplies%20x%5E2-1%3D%5Ccfrac%7B-5%7D%7B-5%7D%0A%5C%5C%5C%5C%5C%5C%0Ax%5E2-1%3D1%5Cimplies%20x%5E2%3D2%5Cimplies%20x%3D%5Cpm%5Csqrt%7B2%7D)
and since we know what "x" is, then let's substitute it on say the 1st equation
7.77/129.5 = 0.06
Therefore the tax rate is 6%
Answer:
572.3
Step-by-step explanation:
Diameter = 27m
Radius = d / 2 = 27 / 2 = 13.5m
Area = pi x r²
= 3.14 x (13.5)²
= 3.14 × 182.25
= 572.3
)
<span>tanx = 3/10 </span>
<span>x=16.7 B </span>
<span>2) </span>
<span>tan 64 = 173/x </span>
<span>x = 84.38 D </span>
<span>3) </span>
<span>tan21 = x/442 </span>
<span>x= 169.67 B </span>
<span>4) </span>
<span>tanx = 16.2/48.3 </span>
<span>x = 18.54 A </span>
<span>5) </span>
<span>tanx = 8/6.5 </span>
<span>x = 50.91 C </span>
<span>6) </span>
<span>tan89 = 1149/x </span>
<span>x=20.06 A </span>
<span>7) </span>
<span>tanx = 21/12 </span>
<span>x= 60.26 B </span>
<span>8) B </span>
<span>9) </span>
<span>tanx = 25/63 </span>
<span>x = 21.64 C </span>
<span>10) </span>
<span>tanx = 60/15 </span>
<span>x= 75.96 D</span>
(5 Neighbors) x (($1.00 Box) + (? Plant) + ($3.00 Gloves)) = 42.50
5 x (1 + x + 3) = 42.50
Combine in parens.
5 x (4 + x) = 42.50
Distribute.
20 + 5x = 42.50
Subtract 20 from both sides.
5x = 22.50
Divide both sides by 5.
x = 4.50
Thats the cost of each plant.
Check.
5 x (1 + 4.50 + 3)
5 x 8.50 = 42.50