The table shows the cost of different numbers of yards of the material that Marnie wants to buy
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Factorise this expression:3x - x^2(If possible, please explain the method used to solve it)My answer is x(3 - x)Is that right?
Y = x +4y=-xx-3Is this parallel perpendicular or neither
Four more than twice a number is 8
5x-5=12please solve the equation
B.4/3
C.4
D.3
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12 = k x 9
12/9 = k
k = 4/3
Hope I helped!
What is the correct answer for this problem? (SHOW WORK)
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Part B
What mistake did Marco make? (SHOW WORK)
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first distribute
a(b+c)=ab+ac
p(c-d)=pc-pd
now we have
pc-pd+c-d
grou the c's with c's and d's with d's
(pc+c)+(-pd-d)
undistribute c's and -d's
c(p+1)-d(p+1)
undistribute with (p+1) as the a
(p+1)(c-d)
tada
(p+1)(c-d)
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The distance when there'll be the same cost will be 2 miles.
From the information given, it was stated that Bert's cab company charges $1.00 plus an additional $3.00 per mile for a ride. Madeline's cab company charges $3.00 plus an additional $2.00 per mile for a ride.
Therefore, the equation to solve the question will be:
1 + 3m = 3 + 2m
3m - 2m = 3 - 1
m = 2
The distance will be 2 miles.
Learn more about equations on:
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If cold water pipe is turned on and hot water pipe is turned on 3 hours later then it will take 36 minutes (or 0.6 hr) to them to fill the pool together.
Step-by-step explanation:
Given :
Cold water pipe can fill a swimming pool in 4 hours, and a hot water pipe in 6 hours.
Solution :
Let's say the swimming pool is x gallons.
The flow rate of the cold water pipe is,
The flow rate of the hot water pipe is,
If the cold water pipe is turned on for three hours, the volume of water is:
The time to fill the rest of the pool with both the cold and hot water pipes is,
= 0.6 hr
If cold water pipe is turned on and hot water pipe is turned on 3 hours later then it will take 36 minutes (or 0.6 hr) to them to fill the pool together.
For more information, refer the link given below
Answer:
0.6 hours
Step-by-step explanation:
Let's say the swimming pool is 12,000 gallons.
The flow rate of the cold water pipe is:
12000 gal / 4 hr = 3000 gal/hr
The flow rate of the hot water pipe is:
12000 gal / 6 hr = 2000 gal/hr
If the cold water pipe is turned on for three hours, the volume of water is:
3000 gal/hr × 3 hr = 9000 gal
That leaves 3000 gallons. The time to fill the rest of the pool with both the cold and hot water pipes is:
3000 gal / (3000 gal/hr + 2000 gal/hr) = 0.6 hr
It takes 0.6 hours (36 minutes).
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513 and 126 both are. (The question doesn't say
that there's only one of them in the list.)
Here's an easy way to tell: (I don't know how or why it works,
but it works.)
You're looking at a big number, and you need to find out if it's
divisible by 9.
Here's the two-step process:
-- If it's going to be divisible by 9, then it has to be divisible by 3.
-- Find out whether it's divisible by 3. If it is, then ...
-- Find out whether it's divisible by 9.
Step 1:
Add up all the digits in the number. If that sum is divisible by 3,
then the original big number is too.
Example:
Is 549 divisible by 3 ?
Add up its digits: (5 + 4 + 9) = 18 .
Is 18 divisible by 3 ?
Yes. That tells you that 549 is divisible by 3 .
So it could be divisible by 9.
Step 2:
Take that same 18 and add up its digits.
(1 + 8) = 9.
9 is divisible by 3.
This tells you that the original big number ... 549 ... is also divisible by 9 .