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BaLLatris [955]
3 years ago
12

a copy machine can copy a report in 30 min. when a second copy machine is used at the same time, the copying can be done in 18 m

in. how long would it take the second copy machine to do the copying alone?
Mathematics
1 answer:
Marta_Voda [28]3 years ago
4 0

Answer:

Step-by-step explanation:

A copy machine can copy a report in 30 mins. When a second copy machine is used at the same time, the copying can be sone in 18 min. How long would it take the second copu machine to do the copying alone?

i have:

x=30

x+y=18

that would be -12..not right?

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A lake has 10,000 fish.when a fishman scoops up his net ,he catches 500 fish. Suppose 150 of the 500 fish in his net are salmon.
Inessa [10]
You need x 20 to get to 10000, so do the same with 150 and get 3000, so it is 3000/10000
8 0
3 years ago
Read 2 more answers
Evaluate................
wolverine [178]

Answer:

h(8q²-2q) = 56q² -10q

k(2q²+3q) = 16q² +31q

Step-by-step explanation:

1. Replace x in the function definition with the function's argument, then simplify.

h(x) = 7x +4q

h(8q² -2q) = 7(8q² -2q) +4q = 56q² -14q +4q = 56q² -10q

__

2. Same as the first problem.

k(x) = 8x +7q

k(2q² +3q) = 8(2q² +3q) +7q = 16q² +24q +7q = 16q² +31q

_____

Comment on the problem

In each case, the function definition says the function is not a function of q; it is only a function of x. It is h(x), not h(x, q). Thus the "q" in the function definition should be considered to be a literal not to be affected by any value x may have. It could be considered another way to write z, for example. In that case, the function would evaluate to ...

h(8q² -2q) = 56q² -14q +4z

and replacing q with some value (say, 2) would give 196+4z, a value that still has z as a separate entity.

In short, I believe the offered answers are misleading with respect to how you would treat function definitions in the real world.

7 0
4 years ago
Solve using perfect square factoring patterns. y2 + 16y + 64 = 0 {8} {0, –1} {–8} {8, –8}
lubasha [3.4K]

Answer:

y^2 + 16y + 64 = 0

(y + 8)(y+8) = 0

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y = -8

y + 8 = 0

y = -8

Step-by-step explanation:

7 0
3 years ago
Can I get some help plz thank u sm
weeeeeb [17]

Answer:

x = 72

hope it helps

5 0
3 years ago
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KATRIN_1 [288]
Ok so all you do is add 150+70+15+1000. That equals to $1235
6 0
3 years ago
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