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tatiyna
3 years ago
9

Round answer to the nearest whole number!!

Mathematics
2 answers:
Svetllana [295]3 years ago
8 0

Answer:

138,706 typewriters

Step-by-step explanation:

290,000(0.9)^7

=138,706

kobusy [5.1K]3 years ago
5 0

Answer:

138,706 typewriters

Step-by-step explanation:

:>

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A sofa costs $50 less than three times the cost of a chair. If the sofa and chair together cost $650, how much more does the sof
Katarina [22]

1. Let S represent the cost of the sofa and C represent the cost of the chair.

If the sofa costs $50 less than three times the cost of the chair, then effectively we can write this as:

S = 3C - 50

If the sofa and chair together cost $650, we can write this as:

S + C = 650

2. Now, we can find out how much the sofa and chair cost by solving the two equations we obtained above for C, and substituting S = 3C - 50 into S + C = 650. Thus, we get:

S + C = 650

if S = 3C - 50, then:

3C - 50 + C = 650

4C - 50 = 650 (Add C and 3C)

4C = 700 (Add 50 to both sides)

C = 175 (Divide both sides by 4)

Thus, the cost of the chair is $175. Now, to find the cost of the sofa we need to simply substitute C = 175 into our first equation, S = 3C - 50:

S = 3(175) - 50

S = 525 - 50

S = 475

Thus, the sofa costs $475.

3. Now that we know that the sofa costs $475 and the chair costs $175, all we need to do is to subtract the cost of the chair from the cost of the sofa to find the difference in price:

475 - 175 = 300

Therefor, the sofa costs $300 more than the chair (answer C).

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Answer: 3a + 2c = 73   (last night)

2a + 5c = 89 (last week)

Step-by-step explanation:

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5 x 10^-2 hope this helps!
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