2 years ago

Which polynomial represents the area of the rectangle?

Mathematics

1 answer:

dlinn [17]2 years ago

5 0

The area is 2x^2+x-10 (the last one) Hope this helps!

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Still pretty confused on this.

aleksandrvk [35]

$\displaystyle \sum_{i=3}^7(3i-1)=3\cdot3-1+3\cdot4-1+3\cdot5-1+\\\\ +3\cdot6-1+3\cdot7-1=8+11+14+17+20=70$

7 0

2 years ago

Find m∠U.<br> Write your answer as an integer or as a decimal rounded to the nearest tenth.

madam [21]

Answer:

Answer:

50.2

Step-by-step explanation:

$ut = \sqrt{ {6}^{2} + {5}^{2} } \\ \sqrt{36 + 25} \\ \sqrt{61 } \\ using \: cosine \: rule \\ cos \: u = \frac{ {5}^{2} + 61 - 36 }{2 \times 5 \times \sqrt{61} } \\ \\ = \frac{25 + 61 - 36}{78} \\ \\ = \frac{50}{78 } \\ \cos \: u = 0.64 \\ \m∠U.: = 50.2$