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dlinn [17]
3 years ago
8

Pls help me. i need it

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
5 0

Answer:

option 2 is correct

Step-by-step explanation:

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One pump can fill a swimming pool in 72 hours. A second pump can fill the same pool in 60 hours. If
Studentka2010 [4]
I’m not sure but i think 66 hours because both pumps must fill half of the pool which would split the timing for each which would make pump 1 take 36 hours to fill half and pump two take 30 hours to fill the rest. when you add these hours it equals 66. i hope i helped :)
4 0
3 years ago
15-3+2<br> What’s the answer and why?
Charra [1.4K]

Answer:

10

Step-by-step explanation:

Apply the DMAS rule.

3 0
3 years ago
Read 2 more answers
Determine the number of triangles that can be formed given the following information: a = 8, b = 10, m
Fiesta28 [93]

Answer:

5

Step-by-step explanation:

5 0
3 years ago
The mean length of 6 childrens' big finger is 6.7cm.
yaroslaw [1]

Answer:

New mean length of these 17 people=11.62

Step-by-step explanation:

<em>Step 1: Determine the total length of children's fingers</em>

L=l×n

where;

L=total length (cm)

l=mean length (cm)

n=number of children

replacing;

L=6.7×6=40.2 cm

The total children's fingers length=40.2 cm

<em>Step 2: Determine the total length of adults fingers</em>

total length of adults fingers=mean length of adults fingers×number of adults

where;

mean length of adults=14.3

number of adults=11

replacing;

total length of adults fingers=(14.3×11)=157.3 cm

<em>Step 3: Determine the new mean length</em>

new mean length=total length of adults and children fingers/number of adults and children

where;

total length of adults and children fingers=157.3+40.2=197.5 cm

number of adults and children=11+6=17

replacing;

new mean length=197.5/17=11.62

7 0
3 years ago
(6 + 7) + 8 = 21
Travka [436]

Answer: 6+(7+8)=21

Step-by-step explanation:

1. By definition, the associative property of addition is:

(a+b)+c=a+(b+c)

This property says that you can group the numbers in different ways and you will obtain the same result.

2. Therefore, if you have the following expression:

(6+7)+8=21

You apply  the Asociative property of addition by regrouping the numbers as following:

6+(7+8)=21

3. Then, you can conclude that the correct option is B.



4 0
3 years ago
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