Answer: there are eight bicycles and 7 tricycles.
Step-by-step explanation:
Let x represent the number of bicycles that are there.
Let y represent the number of tricycles that are there.
There are a total of 15 bicycles and tricycles. This means that
x + y = 15
A bicycle has 2 wheels and a tricycle has 3 wheels. There are 37 wheels all together if we count them up. This means that
2x + 3y = 37- - - - - - - - - - - - - 1
Substituting x = 15 - y into equation 1, it becomes
2(15 - y) + 3y = 37
30 - 2y + 3y = 37
- 2y + 3y = 37 - 30
y = 7
x = 15 - y = 15 - 7
x = 8
That is the pH scale
pH = - log of the concentration of hydrogen ions in a solution.
Answer:
2.700
Step-by-step explanation:
<u>2. 700</u>
14 / 3 7.800
− <u>0</u>
37
− <u>28</u>
98
−<u>98</u>
00
_ <u>0</u>
0 0
− <u>0</u>
0
Hope this helps!
Answer:
270
Step-by-step explanation:
m q =90
so remaining angle for a circle is 270
