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dem82 [27]
3 years ago
12

Mary takes 50 minutes to wash an elephant and NIgel takes 40 minutes to wash an elephant. If they wash and elephant together, ho

w long will it take them?
Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
4 0

Answer:

25 minutes

Step-by-step explanation:

When there are to people washing one elephant they will take half the time.

So half of the longest time will be the answer to the question.  

Mary takes longer then Nigel so once Nigel is finished Mary will still wash her side for 5 minutes extra.

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a circle has an area of 81 3.14 units . what is the diameter in terms of 3.14a circle has an area of 81 Pi square units what is
Sunny_sXe [5.5K]
You have posted 2 separate questions here.  Please, next time, separate them with a blank line:

<span>A circle has an area of 81 3.14 units . what is the diameter in terms of 3.14?

I'd prefer you write this as 
"</span><span>A circle has an area of 81 pi units . what is the diameter in terms of pi?

Area of a circle = A = pi*r^2.  Note that r= diameter / 2.  Here, the area is 81 pi square units, or 9^2 * pi square units, which means that the radius is 9 units.  The diameter is then 2(9 units) = 18 units.


Your second question, separated from the first, is:

"</span><span>a circle has an area of 81 Pi square units what is the diameter of the circle?"
</span><span>
Use the following formula or formulas:  d = 2*r; A = pi*r^2; A = pi*(d/2)^2.  Find r first, and then find d.

</span>
4 0
3 years ago
Read 2 more answers
Determine whether each table represents a linear quadratic or exponential function
Kryger [21]

Answer:

Table A: exponencial function

Table B: quadratic function

Table C: linear function

Step-by-step explanation:

Table A:

for x from 1 to 2, Y increased by 6

for x from 2 to 3, Y increased by 18

for x from 3 to 4, Y increased by 54

So we can see that the values of Y are being multiplied by 3 for each increment of x, so this table represents an exponencial function.

Table B:

for x from 1 to 2, Y increased by 6

for x from 2 to 3, Y increased by 10

for x from 3 to 4, Y increased by 14

The increment of Y is higher than a linear increment and smaller than an exponencial increment, so this is the quadratic function.

Table C:

for x from 3 to 6, Y increased by -2

for x from 6 to 9, Y increased by -2

for x from 9 to 12, Y increased by -2

The increment of Y is constant for the same increment of X, so this is a linear function.

7 0
3 years ago
The exchange rate from Pounds Sterling to Australian Dollars is £1=$1.82
andreyandreev [35.5K]
£164.83. Devide 300 by 1.82.






5 0
3 years ago
(show ur work) Each bag of gourment popcorn for a school fundraiser costs $6.75. The total amount received from the popcorn sale
Alinara [238K]

Answer:

725 Boxes of Popcorn

Step-by-step explanation:

You can do it simply by just typing in the calculator 4893.75÷6.75.

But I can show my work. Picture below

5 0
2 years ago
Anthony has a points card for a movie theater. He receives 85 rewards points just for signing up. • He earns 2.5 points for each
ArbitrLikvidat [17]

Equation: 2.5x + 85 = 100

Answer: x = 6

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3 years ago
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