This is a system of equations, meaning you find the value of one variable and substitute it into the other equation
if y=-x^2-4x+23 we can put that into the second equation for y
This gives us 2x+(-x^2-4x+23)=15
Lets simplify this and set it equal to 0 by moving the 15 over
-x^2-2x+8=0
This gets us x=-4, 2
Lets try plugging both those back into our first equation and see what value of y we get
y=-(-4^2)-4(-4)+23; y=23
y=-(2^2)-4(2)+23; y=11
So you get two sets of solutions
(-4,23) and (2,11)
2.99 because you add the total cost up, which would be 11.96. So then you would divide 11.96 by 2.99 which gives you 2.99
Answer:
C. 162 m2
Step-by-step explanation:
Surface Area
= 2(11×2) + 2(8×2) + 2(10 + 33)
= 44 + 32 + 86
= 162
Hence C
Since its every two days the equation would be
3(1.25+3.5)= how many hours the scientist will spend observing the dolphins and sea lions
that equals 14.25 so thats your answer
