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pickupchik [31]
3 years ago
7

The length of a rectangle is 5 centimeters less than twice its width. Its area is 63 square centimeters.

Mathematics
1 answer:
Tcecarenko [31]3 years ago
8 0

Answer:

I think the Length is 5 cm and the width is 7 cm

Step-by-step explanation:

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Please answer! It would be appreciated if work is also shown!
borishaifa [10]

Quantity of paint left = \frac{389}{480} gallons

Solution:

Quantity of yellow paint = 1\frac{1}{5}=\frac{6}{5} gallons

Quantity of green paint = 1\frac{1}{6}=\frac{7}{6} gallons

Quantity of blue paint = \frac{7}{8} gallons

Quantity of paint used = \frac{3}{4} gallons of each paint

Quantity of paint left = 1-\frac{3}{4}=\frac{1}{4} gallons of each paint

Quantity of paint left = (\frac{6}{5}+\frac{7}{6}+\frac{7}{8})\times\frac{1}{4}

Taking LCM for 5, 6, 8, we get LCM = 120

(\frac{6}{5}+\frac{7}{6}+\frac{7}{8})\times\frac{1}{4}=(\frac{144}{120}+\frac{140}{120}+\frac{105}{120})\times\frac{1}{4}

                         =(\frac{389}{120})\times\frac{1}{4}

                         =\frac{389}{480}

Hence, Mark will have \frac{389}{480} gallons of paint left after painting the mural.

3 0
3 years ago
The price of a train ride is $12 it went up by 1/6 what is the new price<br><br><br> Please help
Serggg [28]
Answer::12/6 :))))))$
5 0
4 years ago
Evaluate f(9) given the function f(x)=3x2 – 11x - 21*
Blizzard [7]

Answer:

123

Step-by-step explanation:

The given function is :

f(x)=3x^2 - 11x - 21

We need to find the value of f(9). It can be done by putting x = 9 in the above function as follows :

f(9)=3(9)^2 - 11(9) - 21\\\\=243-99-21\\\\=123

So, the value of f(9) is 123.

3 0
3 years ago
Can someone please explain how it goes from 0=x^2-2x-3 to 0=(x+1)(x-3)
Sonbull [250]
Basically you are trying to find two numbers that when they are added equals -2 and when multiplied equals -3. As you can see -3 plus +1 is equal to -2. And 1 times -3 equals -3. Therefore you have (x+1)(x-3). In order to check if these are the right numbers you will need to multiply (x+1)(x-3) and will end up with the first equation x^2-2x-3. Hope this helped! :)
6 0
3 years ago
Please help!!<br> i will mark as brainliest
Viktor [21]

Step-by-step explanation:

okay

I think you should use the method of tan 30

and then find x by using pythagorean theorem

4 0
3 years ago
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