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ArbitrLikvidat [17]
2 years ago
5

PLEASE HELP

Mathematics
1 answer:
SIZIF [17.4K]2 years ago
5 0
C :Rule 72 I think Maybe its true
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Seven less than twice a number is 5
marin [14]
Yes, i believe so because u can count back twice and u will get 5. You could al so do: 7-2=5. Hope this helps
8 0
3 years ago
What is 86.8954776543 rounded to the nearest millionth/ show work
stepladder [879]
<span>86.8954776543 rounded to the nearest millionth is 86.895478


The order after the decimal point goes like this:

tenths, hundredths, thousandths, ten thousandths, hundred thousandths, millionth</span>
3 0
3 years ago
Read 2 more answers
How many places do you need to move the decimal to the left to write the
NikAS [45]

Answer: 6 x 10^12

Step-by-step explanation:

Move the decimal to the left so there is one non-zero digit number left of the decimal point. This will be the exponent placed on 10

3 0
3 years ago
PLEASE HELP AND SHOW WORK!!
Nastasia [14]

Answer:

Pipe 1 alone fills a tank in 10 min

Pipe 2 alone fills the tank in 20 min

If both are turned on together, how long will it take to fill the tank???

Pipe 1 fills at the RATE of 1/10th tank per min

Pipe 2 fills at the RATE of 1/20th tank per min

Pipe 1 + Pipe 2 fills at the rate of 1/10+1/20 or 3/20th tank per min

Let x= time to fill the tank

(3/20)(x)=1 Where 1 denotes a full tank (Multiply both sides by 20)

3x=20

x=6 2/3 min----------both working together

NOW YOUR PROBLEM

Let x= amount of time for smaller pipe to fill the tank

Then (x-5)=amount of time for larger pipe to fill the tank

NOW HERE'S WHERE THE RECIPROCAL COMES IN:

The smaller pipe fills the tank at the RATE of 1/x cu units per min

The larger tank fills the tank at the RATE of 1/(x-5) cu units per min

Together, they fill the tank at the rate of 1/x+(1/(x-5)) cu units per min

But now we are told that together the fill the tank in 11 1/9 minutes. so our equation to solve is:

(1/x+(1/(x-5))(11 1/9)=1 where 1 denotes a full tank. In fact, in each of the above reciprocals, the 1 denotes a full tank.

So, dividing both sides by 11 1/9, we get:

1/x+(1/(x-5)=1/(11 1/9)-------------- which is your equation

I assume that you have no problems solviing this eq.

Hope this helps----ptaylor

Step-by-step explanation:

7 0
2 years ago
20% of what number is equal to 2/3 of 90?
blagie [28]
Let the number be x, then

1/5 * x = 2/3 * 90

1/5 x =  60

x = 60 * 5  = 300 (answer)
7 0
3 years ago
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