Answer:
-2a+6
Step-by-step explanation:
-3a+a=-2a
1+5=6
-2a+6
The train is going 90 mph.
This one is easy to explain, if you have 90 miles travelled in one hour of time, then you have 90 mi/1 hour, or 90 mph.
Use PEMDAS and the distributive property to solve this problem-
3(x+2)-2(x+1)=8
(3 times x and 3 times 2)
3x+6-2(x+1)=8
(-2 times x and -2 times 1)
3x+6-2x-2=8
Combine like terms (3x/-2x and 6/-2)
x+4=8
Subtract 4 from both sides
x=4
144 = 12^2
121 = 11^2
so root(130) is between 11 and 12, so is about 11.4 on the number line.
hope this helps :)
The original floor could be rectangle in shape.
If we consider the length of floor to be 'L' and width of floor to be 'W',
then area of original floor = length x width = LW.
And if its dimensions are dilated by scale factor of 4 to make new floor, then new length and width would become four times of older values. So new length would be '4L' and new width would be '4W'
Now area of new floor = length x width = 4L x 4W = 16LW.
It is clear that the area of new floor is 16 times of the area of original floor.
So, option C i.e. 16 is the final answer.
