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Elodia [21]
3 years ago
6

Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 6 hours. How much time would it take for them to mow the

lawn together?​
Mathematics
1 answer:
enot [183]3 years ago
6 0

Step-by-step explanation:

Jack mows 1 lawn in 3 hours

= 1/3 lawn in 1 hour

Marilyn mows 1 lawn in 6 hours

= 1/6 lawn in 1 hour

Together, they can mow 1/3 + 1/6

= 1/2 lawn in 1 hour.

Hence they will need 2 hours to mow the lawn.

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Sarah opens a small bag of chocolate candies and notices that out of 210 candies, 63 are brown. She assumes the color breakdown
mezya [45]

Answer:

1440

Step-by-step explanation:

We can solve this problem by applying the rule of three.

In fact, we know that:

- Over a package of 210 candies,

- The number of brown candies is 63

- Here we want to find what is the number of brown candies when the total number of candies contained in the package is 4800

So we can set up the following rule of three:

\frac{x}{4800}=\frac{63}{210}

where

x = number of brown candies when the total number of candies contained in the package is 4800

Solving the expression for x, we find:

x=\frac{63}{210}\cdot 4800 =1440

So, Sarah can expect to find 1440 brown candies in a package of 4800 pieces.

7 0
3 years ago
Factor: X squared -9 = 0
Ratling [72]
0 is the correct answer bc you can’t have a negative sign under the radical bar
4 0
3 years ago
FACTOR EACH EXPRESSION, IF IT CANT BE FACTORED WRITE CANNOT BE FACTORED. 1. 4x+12
dimaraw [331]
1.) 4(x+3)
Find the GCF, Greatest Common Factor, of 4x and 12. 
4x=2*2*x
12=3*2*2
The greatest common factor is 4. Put this outside of the parentheses.             (You would multiply the 2*2)
Then, put the rest of the factors as a sum. (Only the factors on the same line.)
Solution: 4(x+3)

To check, distribute to see if it works.

4x+12

2.) 2(4r+7)
Find the GCF of 8r and 14
8r=2*2*2*r
14= -1*7*2
The greatest common factor is 2.                                                                 (There is only 1 two, so you would not multiply them.)
Then, put the rest of the factors as a sum. (Only the factors on the same line.)
Multiply the 2*2*r as one addend and the -1*7 as the other.
Solution: 2(4r-7)

To check, distribute to see if it works.

8r-14

Do you get it now?

3.) 5(x+7)
4.) 7(2x+1)
5.) Cannot be factored.

32x-15
Find the GCF of 32x and -15

32x: 2*2*2*2*2*x
-15: -1*5*3

Because there are no similar factors other than 1, it cannot be factored.

6.)  8(4x+3)
7.) 3(2x-3)
8.) 24(1x+2)
9.) 9(-2x+8)
10.) Cannot be factored
11.) 8(1x+3)
12.) 50(1x+5)



4 0
3 years ago
Read 2 more answers
Please help me answer this for me please
slamgirl [31]

Answer:

first one is 5.8

second on is 4.47 round

third one is 1.92

Step-by-step explanation:

8 0
2 years ago
Sasha had $1800 and share it in the ratio 2:3:4 between her 3 cousin what was the largest share
PilotLPTM [1.2K]

Answer:

$800

Step-by-step explanation:

total \: units \:  =  \\ 2 + 3 + 4 = 9 \: units \\ 9 \: units \:  = 1800 \\ 1 \: unit \:  = 1800 \div 9 \:  = 200 \\ largest \: share \:  = 4 \: units \\ 4 \: units \:  =  \: 200 \times 4 = 800

5 0
2 years ago
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