Answer:
C+B
Step-by-step explanation:
you add A + B = C
Let:
x = Chemistry textbooks sold
y = Physics textbooks sold
The textbook store sold a combined total of 260, so:

The number of chemistry books sold was three times the number of physics textbooks sold, so:

Let:

Replace (2) into (1):

Replace the value of y into (2):
Answer:
30,60,90 triangle, which is the lengths 1 √
3
, and 2
respectively. This is what I have got so far: Using the 30-60-90 Ratio
Step-by-step explanation:
3.9
×104
_____
405.6
8.7
×102
_____
887.4
Speed=distance/time
You'll have to combine like terms.
36+14=50
1.5+0.75=2.25
And then you can use the formula.
50/2.25