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Gemiola [76]
3 years ago
10

Which of the choices best describes this arithmetic sequence? -2, 1, 4, 7, 10

Mathematics
2 answers:
olga nikolaevna [1]3 years ago
5 0

A1 = -2

An = an-1 + 3

n200080 [17]3 years ago
4 0

Answer:

the best choice for the sequence is +3

Step-by-step explanation:

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I NEED HELP PLEASE, THANKS! :)
Elena L [17]

Answer:

First option is the right choice.

Step-by-step explanation:

\frac{1}{\cos \left(x\right)+1}+\frac{1}{\cos \left(x\right)-1}\\\\\frac{\cos \left(x\right)-1}{\left(\cos \left(x\right)+1\right)\left(\cos \left(x\right)-1\right)}+\frac{\cos \left(x\right)+1}{\left(\cos \left(x\right)+1\right)\left(\cos \left(x\right)-1\right)}\\\\=\frac{\cos \left(x\right)-1+\cos \left(x\right)+1}{\left(\cos \left(x\right)+1\right)\left(\cos \left(x\right)-1\right)}\\\\=\frac{2cos\left(x\right)}{cos^2\left(x\right)-1}\\\\=\frac{2cos\left(x\right)}{sin^2\left(x\right)}

=2\cdot \frac{cos\left(x\right)}{sin\left(x\right)}\cdot \frac{1}{sin\left(x\right)}\\\\=-2cot(x)csc(x)

Best Regards!

7 0
3 years ago
Divide. Express your answer in simplest form. 2 1/2 ÷ 2 1/6 <br><br>13/15 5 5/12 26/30 1 2/13
Marianna [84]

Answer:

\frac{15}{13}  = 1 \frac{2}{13}

Step-by-step explanation:

2 \frac{1}{2}  \div 2 \frac{1}{6}  \\  \\  \\  \frac{5}{2}  \div  \frac{13}{6}  \\  \\  \\  \frac{5}{2}  \times  \frac{6}{13}  \\  \\  \\  \frac{5}{1}  \times  \frac{3}{13}  \\  \\  \\ =   \frac{15}{13}  \\  \\  \\  =  1\frac{2}{13}

I hope I helped you^_^

7 0
2 years ago
Read 2 more answers
The floor of a storage unit is 7 feet long and 6 feet wide. What is the distance between two opposite corners of the floor? If n
andrey2020 [161]

\text{Find the distance from one corner to the other}\\\\\text{In this question, we would use the Pythagorean theorem to find the length}\\\text{between corners}\\\\\text{Pythagorean theorem:}\\\\a^2+b^2=c^2\\\\\text{We are trying to find c}\\\\\text{Plug in and solve:}\\\\7^2+6^2=c^2\\\\49+36=c^2\\\\85=c^2\\\\\text{Square root}\\\\\sqrt{85}=\sqrt{c^2}\\\\\sqrt{85}=c\\\\\text{In decimal form, it's: 9.219544}\\\\\text{Round to the nearest tenths place}\\\\\boxed{9.2\,\, feet}

6 0
3 years ago
State whether the triangles ABC and MNO are similar or not and explain how you know.
AleksAgata [21]
Triangles ABC and MNO are similar:
1.) same shape-different size
2.) corresponding angles are equal-both triangles are isosceles triangles.
3.) corresponding sides are in the same ratio 12/7.5=8/5=1.6
4 0
3 years ago
I need help with i-ready
qwelly [4]

Answer:

2/3 is the constant of proportionality.

4 0
3 years ago
Read 2 more answers
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