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lesya [120]
3 years ago
8

Please help

Mathematics
1 answer:
s2008m [1.1K]3 years ago
5 0

Answer:

Step-by-step explanation:

1. 12

2. 12/3.5 = 3.43

3. 12/15 = 0.8

4. 3.43/0.8

5. 315/x

6. 315/x = 0.8/3.43

7. (315)(3.43) = 0.8x divide both sides by 0.8, so x = 1,350.5625 feet.

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By the age of 21, the best violinist and pianist will have practiced at least 10,000 hours. If you practice and instrument 45 mi
Alika [10]

Answer:

273.94 hours.

Step-by-step explanation:

1 day = 0.75 hours of practicing in a day.

365.25 = x

1/365.25 = 0.75/x        Cross multiply

x = 0.75 * 365.25        Combine

x =  273.94 hours

8 0
3 years ago
What is the value of fraction 1 over 3x3 + 5.2y when x = 3 and y = 2?
Slav-nsk [51]

Hello from MrBillDoesMath!

Answer:

1/ 91.4

Discussion:

Evaluate  1/ ( 3x^3 + 5.2y)   when x = 3, y = 2.

1/ (3 (3)^3 + 5.2(2))  =

1/ ( 3 * 27 + 10.4) =

1/ ( 81 + 10.4) =

1/ (91.4) =

.0109 (approx)

Thank you,

MrB

6 0
3 years ago
Line ab and cd (if presented in the picture) are straight lines. Find x (the pictures are not scaled)
erastova [34]

Answer:

x + 2x + 34 + 20 = 180

3 0
3 years ago
303 is 93% of what? 3.26 32.58 325.81 3,258.06
emmasim [6.3K]
325.81
It is correct im sure of it
5 0
2 years ago
5/9 -7/15 divided by 1 5/9 ×7/15
Greeley [361]
Hi there,

the first part equals 4/45 and the second part equals 7/9

4/45 divided by 7/9 = 0.00141093474
Hope this helps :)<span>
</span>
3 0
3 years ago
Read 2 more answers
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