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xeze [42]
3 years ago
7

Find the sum. 1/4 + 2/7 a. 9/14 b. 3/11 c. 15/28 d. 3/28

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
5 0
1/4 + 2/7 =

The denominators 4 and 7 lcm are 28

So,
1/28 + 2/28 = 3/28

3/28 is the answer to your question.
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The diagonals of a rhombus are 21 m and 32 m. What is the area of the rhombus?<br> 30 POINTS
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I have included attachment below

so since a rhombus is 2 pairs of paralell sides, we can cut it into 4 triangles
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galina1969 [7]

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Step-by-step explanation:

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3 years ago
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Solve for x and y in the system of equation<br>3x²+4y=17 <br>2x²+5y=2<br>I'll mark brainliest​
Novay_Z [31]

Answer:

x=\pm \sqrt{11} \\y=-4.

Step-by-step explanation:

\left \{ {{3x^2+4y=17} \atop {2x^2+5y=2}} \right. \\\\Then\\\\\left \{ {{2 \times (3x^2+4y)=2 \times 17} \atop {3\times(2x^2+5y)=3\times2}} \right. \\\\\left \{ {{6x^2+8y=34 \quad (1)} \atop {6x^2+15y=6\quad (2)}} \right.\\\\(1)-(2) \Rightarrow -7y=28 \Rightarrow y =-4.\\Since \: \:  2x^2+5y=2 \Rightarrow 2x^2=2-5y\\\Rightarrow 2x^2=2+20=22\\\Rightarrow x^2=22:2=11\\\Rightarrow x=\pm \sqrt{11}.

7 0
2 years ago
Why is the number 19/100 a rational number?
Kobotan [32]

Answer:

  B. It is the quotient of 19 divided by 100

Step-by-step explanation:

A rational number is the quotient of two integers. 19/100 is the quotient of the integers 19 and 100.

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3 years ago
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