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3 years ago

What explicit formula matches the arithmetic sequence -2, 1, 4, 7, 10, ...?

Mathematics

1 answer:

Ray Of Light [21]3 years ago

5 0

$a_1=-2\\
d=3\\
a_n=a_1+(n-1)d=-2+(n-1)\cdot3=-2+3n-3=3n-5$

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Can you please help me thank you so much

77julia77 [94]

Answer:

I would say angle 6 is supplementary to angle 3.

Step-by-step explanation:

Supplementary angles are angles that add up to 180 degrees.

Angles 6 and 3 are right angles.

90 + 90 = 180

Hope I helped!

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3 years ago

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what is the answer? if a fundraiser sells t-shirts for 15$ each. it cost 20$ plus 9$ per shirt.how many shirt do they need to se

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Answer:

Step-by-step explanation:

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3 years ago

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Liono4ka [1.6K]

Answer:

2x + y = 12

Step-by-step explanation:

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3 years ago

143/333 as a decimal with solution

zloy xaker [14]

Answer:

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3 years ago

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How do I solve part A

seraphim [82]

Answer:

The solution of this expression is $x_{1} = -1$ and $x_{2} = -\frac{1}{2}$ .

Step-by-step explanation:

The procedure for solution of exercise A is described below:

1) We expand the expression.

2) The resulting expression is rearranged into the form of a second order polynomial.

3) Roots are found by Quadratic Formula.

Step 1:

$2\cdot x \cdot (x+1.5) = -1$

$2\cdot (x^{2}+1.5\cdot x) = -1$

$2\cdot x^{2} + 3\cdot x = -1$

Step 2:

$2\cdot x^{2}+3\cdot x +1 = 0$

Step 3:

$x_{1, 2} = \frac{-3\pm \sqrt{3^{2}-4\cdot (2)\cdot (1)}}{2\cdot (2)}$

$x_{1,2} = -\frac{3}{4}\pm \frac{1}{4}$

$x_{1,2} = \frac{-3\pm 1}{4}$

The solution of this expression is $x_{1} = -1$ and $x_{2} = -\frac{1}{2}$ .

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3 years ago