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777dan777 [17]
3 years ago
5

A certain ore contains 9 percent gold. How much ore (in tons) is needed to obtain 126 tons of gold

Mathematics
1 answer:
Stella [2.4K]3 years ago
7 0

Answer:

it'll take 251,991 tons of ore to obtain 126 tons of gold.. That's a lot

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I forgot how to do this problem can I get some help
Step2247 [10]
You would convert 17 1/4 to 17 4/16, and change 7/8 to 14/16. Then you would add those 2 numbers together to get 17 18/16 or simplified, 18 1/8.
8 0
3 years ago
A boat traveled 336 miles downstream and back. The trip downstream took 12 hours. The trip upstream took 14 hours. What is the s
Alexeev081 [22]

x - boat speed; y - current speed; Path = 336:2 = 168 miles

1) 12 * (x + y) = 168; -> x + y = 14;

2)  14 * (x - y) = 168; -> x - y = 12;

1) x = 14 - y;

2) (14 - y) - y = 12;

14 - 2y = 12;

2y = 2;

y = 1 mph

x = 14 - 1 = 13 mph

Answer:

Boat speed = 13 mph

Current speed = 1 mph

3 0
3 years ago
I am 3/2 as old as Paul. Ten years later, I will be 5/4 of Paul's age then. How old am I now? How old is Paul now?
Maslowich

Answer:

to be fair, i really dont know this

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
What is the explicit formula for this sequence? 2,10,50,250,1250<br>​
Valentin [98]

Answer:

a_n = 2(5)^{n-1}

Step-by-step explanation:

Explicit Geometric Formula: a_n = a_1r^{n-1}

a₁ is 1st term

<em>r</em> is common ratio

<em>n</em> is term number

Step 1: Find common ratio <em>r</em>

r = 10/2 = 5

Step 2: Plug variables into formula

a_n = 2(5)^{n-1}

4 0
3 years ago
Read 2 more answers
The perimeter of a rectangular field is 302 yards. If the width of the field is 65 yards, what is its length?​
Molodets [167]

Answer:

L= 86 yards

Step-by-step explanation:

Perimeter = 2length + 2width

So,

302= 65(2) + 2(L)

302= 130+2L

-130

172=2L

Length= 86

7 0
3 years ago
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