The answer is 11 if you use PEMDAS! Here is my work:
9+4-4+2 = I multiplied and divided first
13-4+2....9+2....11
Hope this helped :))
First one is positive second one is negative third one is negative fourth one is positive and the last one is positive
Answer:
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Step-by-step explanation:
Let the goldfish be G.
• Let the betta fish be B.
Given the following data:
• Total number of fishes = 150 fishes.
• Ratio of G to B = 2:3
• Total ratio= 2 + 3 = 5
To calculate the number of goldfish that the pet store have:
What is ratio?
Ratio can be defined as an expression that is used to denote the proportion of two (2) or more quantities with respect to one another and the total quantities.
Mathematically, the number of goldfish in the pet store is given by this expression:
2 G = x 150 5
G = 0.4 x 150
G = 60 fishes.
-4X – (-13). if x = 4
Plug in x = 4:
-16x + 13.
Note: Can't solve an expression.
For this case, what we can do is calculate an average of the time it takes to fill the tank for both pipes.
We have then:
taver = (tA + tB) / (2)
Where,
taver: average time (both pipes)
tA: time it takes the pipe A
tB: time taken by pipe B
Substituting the values:
9.9 = (18 + tB) / (2)
Clear tB:
tB = (2 * (9.9)) - 18
tB = 1.8 hours
Answer:
it takes pipe B, running alone, to fill the tank about 1.8 hours