Answer ad Step-by-step explanation:
<em><u>1. Adding 10mn and -15mn.</u></em>
10mn + -15mn = <u>-5mn</u>.
<em><u>2. Adding </u></em>
<em><u> and </u></em>
<em><u>.</u></em>
.
<em><u>3. Adding 6(x + 3) and -7(x + 3).</u></em>
<u />
6x + 18 + -7x - 21
<u>x - 3.</u>
4. Adding ?
<em><u>5. Adding 0.5xyz and 1.5 xyz.</u></em>
0.5xyz + 1.5xyz = <u>2xyz.</u>
<u></u>
<u></u>
<u></u>
<em><u>#teamtrees #PAW (Plant And Water)</u></em>
Answer:
-30
Step-by-step explanation:
400-[200-{35+15-70(100/25)}]
400-[200-{35+15-70(4)}]
400-[200-{35+15-280}]
400-[200-{50-280}]
400-[200-{-230}]
400-[430]
-30
We write the equation in terms of dy/dx,
<span>y'(x)=sqrt (2y(x)+18)</span>
dy/dx = sqrt(2y + 18)
dy/dx = sqrt(2) ( sqrt(y + 9))
Separating the variables in the equation, we will have:
<span>1/sqrt(y + 9) dy= sqrt(2) dx </span>
Integrating both sides, we will obtain
<span>2sqrt(y+9) = x(sqrt(2)) + c </span>
<span>where c is a constant and can be determined by using the boundary condition given </span>
<span>y(5)=9 : x = 5, y = 9
</span><span>sqrt(9+9) = 5/sqrt(2) + C </span>
<span>C = sqrt(18) - 5/sqrt(2) = sqrt(2) / 2</span>
Substituting to the original equation,
sqrt(y+9) = x/sqrt(2) + sqrt(2) / 2
<span>sqrt(y+9) = (2x + 2) / 2sqrt(2)
</span>
Squaring both sides, we will obtain,
<span>y + 9 = ((2x+2)^2) / 8</span>
y = ((2x+2)^2) / 8 - 9
The answer is 7 i did it on a calculator lol
