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3 years ago

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