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ycow [4]
3 years ago
5

There are 2 miners in a mine. Miner 1 mines 19,687 m of ore in one hour. Miner 2 mines 19,687 m of ore in 51 minutes. Find out h

ow much ore Miner 2 mines in 1 hour.
Mathematics
1 answer:
patriot [66]3 years ago
8 0
Miner #2 mines 19,687 m (meters ?) of ore in 51 minutes.

That's  (19,687/ 51) m (meters ?) per minute.

There are 60 minutes in one hour.  So if he maintains that same
average rate for a whole hour, he will mine

           (19,687 / 51) x (60)   =   23,161 m (meters) of ore.
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Which is the better buy, 36 cans for $3.32, or 9 cans for $0.91 ?
valentina_108 [34]

Answer:

36 cans for $3.32

Step-by-step explanation:

36 cans = $3.32

1 can =$ 0.092

9 cans = $0.91

1 can = $0.01

0.09 and 0.1 the cheaper is 0.09 dollars so 36 cans for $3.32 is better

6 0
4 years ago
the length of a rectangle is 9 centimeters more than the width. the area is 112 square centimeters. find the length and width of
NeX [460]
Here,
let width(b)be x then,
length (l)=9cm+x
area =112 sq cm
now,
area of rectangle=l*b
or, 112=(9+x)x
or, 112=9x+x^2
or, 0=x^2+9x-112
or, 0=x^2+(16-7)x-112
or, 0=x^2+16x-7x-112
or, 0=x(x+16)-7(x+16)
or, 0=(x-7)(x+16)
either,
0=x-7
or,7=x
x=7cm
Or,
0=x+16
or, -16=x
x= -16[impossible,as distance is never negative] so,
x=7cm
therefore,length = 7cm + 9 cm = 16cm and width = 7cm.
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8 0
3 years ago
Read 2 more answers
Evaluate-2.75 - f for f = -6.5
Stels [109]

Answer:

Step-by-step explanation:

we have f=-6.5

-2.75- (-6.5)= -2.75+6.5=3.75

4 0
3 years ago
Which expressions are equivalent to 4 to the 5 power choose all that apply
Nuetrik [128]

Answer:

since you didn't put the answer choices, this is what I know...

4 to the 5 power is 1024

it can be written as:

4x4x4x4x4 or 4^5

Step-by-step explanation:

7 0
2 years ago
For #1 we’re adding/subtracting/multi polynomials I need the answer for #1 its kind of shaded off
lubasha [3.4K]

Answer:

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Step-by-step explanation:

Given

(2x³ - 4x² - 3x + 5) + (- 2x³ - 2x² + x - 4)

Both parenthesis are distributed by 1 thus just remove them

= 2x³ - 4x² - 3x + 5 - 2x³ - 2x² + x - 4  ← collect like terms

= - 6x² - 2x + 1

6 0
3 years ago
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