Answer:
2.2 seconds.
Step-by-step explanation:
We have been given that an astronaut on the moon drops a tool from the door of the landing ship. The quadratic function 
models the height of the tool, in meters, after x seconds.
To find the time, it will take for the tool to hit the surface of moon, we will set 
and solve for x as:
Divide both sides by negative 2:
Now, we will take square root of both sides:
Since time cannot be negative therefore, it will take 2.2 seconds for the tool to hit the surface of the moon.
Answer:
15/4, or 3 3/4 is your answer.
Step-by-step explanation:
Isolate the variable, t. Note the equal sign, what you do to one side, you do to the other. Multiply 3/2 to both sides.
(3/2)(2/3)t = (5/2)(3/2)
t = (5/2)(3/2)
t = 15/4
15/4, or 3 3/4 is your answer.
~
Since percents are out of 100 (69/100), you can change them to a ratio which in this case would be 69:100 because it can't be simplified.
Answer:
okay im sorry but i can only help with the first page so im going to use the first equation as an example. when it tells you what x equals in this case four you put it in place of the variable and put it all together and see if those two numbers egual the amount given. so here it written out:
x +11=15 x= 4
4+ 11 + 15.
in this case yes the given numbers equal the amount.
really hope this helped you!
Step-by-step explanation:
