You mean, what is this number?
we can rephrase it like this: the sum of a number x and 8 is 15
which is:
x+8=15
we subtract 8 from both sides and we get
x=7
so the answer is 7.
Answer:
C.
Step-by-step explanation:
At least means greater than or equal to.
You can solve this question using two different methods. One is obviously a hit and trial method in which you keep guessing a number which gives the same amount of total cost. Second is forming two different equations and then solving them using simultaneous methods learnt.
The correct answer is 75 miles. I used the hit and trial method. You can see 20 + 75 * 0.35 = 46.25 and similarly 35 + 75 * 0.15 = 46.25. Hence the same cost.
Let h,l, and w represent the height, length, and width of the building respectively
Then
The new value of h = 50m, but l remains the same.
That is l = 10m
Therefore
Hence, the width is 2.5m
A is the answer............ If you plot it on a graph, it shows a square.
