Answer:
![x\in[-2.84,1.17]](https://tex.z-dn.net/?f=x%5Cin%5B-2.84%2C1.17%5D)
Step-by-step explanation:
The first, we will write our inequality in another form:



We want to know when is it equal to 0.
First we solve the equation
:




So we want to know when
is true. We know, when a>0 function is negative when x is between two zeros. In our example a=3>0. Then we have:
It is true if
Answer:
Step-by-step explanation:
First method: for (x+3)^2 if you multiply (x+3)(x+3) you get x^2+6x+9 which doesn't equal x^2+9
Second way: plug in a variable for example (2+3)^2= 25 and 2^2+9=13 so 13 doesn't equal 25
Answer:
a) y = 0.10(16) + 100
y = $ 101.60
b) y = 0.10(150) + 100
y = $115
c) y = 0.10(200) + 100
y = $120
d) y = 0.10(250) + 100
y = $125
Step-by-step explanation:
12, because the triangle is a 45,45,90 so sides a and b are both x, and the hypotenuse is x times the square root of 2. this means the hypotenuse is 6• the square root of 2• the square root of 2, the square root of 4 is 2. 6•2=12
Answer:
the third one and the last one is correct
Step-by-step explanation:
we already know the second one is wrong because of it's set up.
just replace the points (-1,7) into each equation. if it doesn't work then move on to the next one. if it does work, then use that same equation except this time to the coordinates (2,4)