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tigry1 [53]
3 years ago
11

Explain how you know that21/30 is greater than 2/3

Mathematics
2 answers:
algol [13]3 years ago
6 0
because if we take the one out and the zero it will just be 2/3
JulijaS [17]3 years ago
4 0
You can divide 21 by 30 and that would give you 0.7 and if you divide 2 by 3 that would give you 0.6 repeating. Therefore, that is how I know that 21/30 is greater than 2/3.
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2(7x-9)=5(x+3)<br> Solve for x
Nadya [2.5K]

Answer:

x = 3.67

Step-by-step explanation:

Simplify both expressions

14x - 18 = 5x + 15

Subtract the bigger (n)x by the smaller

14x - 5x = 9x

Plus the smallest by itself, giving you:

9x - 18 = 15

     +18   +18

9x = 33

Simplify ( divided by 3 )

3x = 11

x = 3.67

7 0
2 years ago
The length of a rectangle is four times its width.
mixer [17]

Let width be x

  • length=4x

ATQ

\\ \sf\longmapsto 2(x+4x)=70

\\ \sf\longmapsto 5x=35

\\ \sf\longmapsto x=7

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3 0
2 years ago
Read 2 more answers
Which of the following is a quadratic equation that has the roots x = 2 and x = −7? (4 points)
crimeas [40]

Answer:

x^2 + 5x - 14

Step-by-step explanation:

We can assume that if there is 2 options for x, this is a quadratic equation that equals 0.

Therefore, we can put this into brackets as one bracket must equal 0.

(x - 2) (x + 7)

After this we expand, which is a process easier to search up

The answer is:

x^2 + 7x - 2x - 14

We can simplify this to:

x^2 + 5x - 14

x^2 represents x squared in case you were wondering

Therefore, the answer is:

x^2 + 5x - 14

8 0
2 years ago
What is 18/25 as a decimal
Serga [27]

Answer: 0.72

Step-by-step explanation:

Hope that helps :)

4 0
3 years ago
Read 2 more answers
Find the derivative of f(x) = 8x^2 + 11x at x = 7.
sleet_krkn [62]
Thank you for posting your question here at brainly. Feel free to ask more questions.  

f′(x)=2∗(8x(2−1))+1∗11x(1−1)

which is

f′(x)=16x+11

then let x = 7 gives us

f′(7)=123

      <span>
<span>Hope my answer would be a great help for you. </span> </span>  

<span> </span>

6 0
3 years ago
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