Answer:
Number pencils Ava bought = 2
Explanation:
Price of pen = 2 $
Price of pencil = 1 $
Total money spent = 12 $
Let the number of pen be a and number of pencil be b.
2 a + b = 12 -----------------------------------Equation 1
We have, she bought 3 more pens than pencils
a - b = 3 -------------------------------------- Equation 2
Equation 1 +Equation 2,
2 a + b + a - b = 12 + 3
3a = 15
a = 5
Substituting in equation 2
5 - b = 3
b = 2
Number pencils Ava bought = 2
The formula would look like this
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y = w(x) = √x
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The plot graph from the given value of <span>x </span>; the corresponding values of y are
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x y
0 0
0.04 0.2
0.09 0.3
0.16 0.4
0.25 0.5
0.36 0.6
0.49 0.7
0.64 0.8
0.81 0.9
1.0 1.0
I hope this was helpful :)
Answer:
40/9
Step-by-step explanation:
Use the work formula, 
+ 
= 
, where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.
Plug in the times for David and Alex alone:
+ 
=
Find the least common denominator, which is 40.
+ 
=
=
Cross multiply and solve for T:
9T = 40
T = 40/9
So, if they worked together, it would take them 40/9 hours
Answer:
63
Step-by-step explanation:
9x7=(10x7)-1x(7)
=70-7
=63
