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babymother [125]
3 years ago
10

Q. At the gas station Jessie purchases a candy bar for $1.25, a drink for $2.58 and a bag of

Mathematics
1 answer:
skad [1K]3 years ago
6 0
The answer is $7.3 :)
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Pump 1 can empty a pool in 8 hours while Pump 2 can empty the same pool in 9 hours. If the two pumps worked together, how long w
yan [13]
<span>Rate of pump A: 1/8 of a pool per hour 
Rate of pump B: 1/9 of a pool per hour 
Combined rate: 1/8+1/9 = 17/72 +1/9 = 25/72 

So if they work together, the two pumps have a combined rate of 25/72 of a pool per hour (i.e in one hour, the two pumps will empty 25/72 of the pool) 

</span><span>But we want to empty ONE pool (not 25/72 of one). So we need to multiply 25/72 by some number x to get 1.
 </span>
<span>Now solve for x 
x=2.88
</span><span>It will take the two pumps 2.88 hours to empty the pool.
2 hours 52 minutes 50 seconds</span>
7 0
3 years ago
Let C(x) be the cost to produce x batches of​ widgets, and let R(x) be the revenue in thousands of dollars. R(x) = − x² + 6x​, C
Musya8 [376]

Answer:

Step-by-step explanation:

Let C(x) be the cost to produce x batches of​ widgets, and let R(x) be the revenue in thousands of dollars.

R(x) = -x^2 + 6x,\\ C(x) = x + 4.

Profit function = Revenue  - cost

So we get profit function by subtracting C(x) from R(x) using algebraic method of subtraction.

Profit function of x

= Pr(x) = R(x) -C(x)\\= -x^2+6x-x-4\\=-x^2+5x-4

7 0
3 years ago
How many ways can you give 18 cards to 2 people
NeTakaya
9 because 18÷2=9
you can use models to help too
get 18 things and put them in 2 groups
3 0
3 years ago
Read 2 more answers
How do you put 300,000+10,000+6,000+20+9
dsp73

Answer:

three hundred thousand plus ten thousand plus six thousand plus twenty plus nine

Step-by-step explanation:

300,000 → three hundred thousand

10,000 → ten thousand

6,000 → six thousand

20 → twenty

9 → nine

+ → plus

Now put everything together.

Best of Luck!

3 0
3 years ago
Simplify.<br> 4(w-2) - 6
Alex Ar [27]
Answer: 4w-14

Step By step explanation: 4(w-2)-6= 4w-8-6= 4w-14
4 0
3 years ago
Read 2 more answers
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