Solve for a.

Mathematics

1 answer:

egoroff_w [7]3 years ago

3 0

Answer: $a=\sqrt{\frac{30}{23} }$

Step-by-step explanation:

$23a^2=30$

Divide by 23

$a^2=\frac{30}{23}$

Extract the square root.

$a=\sqrt{\frac{30}{23} }$

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For a trapezoid with a height of 7 centimeters and base lengths of 6 centimeters and 10 centimeters, the area is

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3 years ago

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What is (-4, 2) and (6, -3) in slope intercept form?

mr Goodwill [35]

Answer:

y=0.5x

Step-by-step explanation:

y=mx+b

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Sum n=3 ^ infty (2n+5)<br>find the series shown

Margarita [4]

<h3>Answer: Choice C) 11 + 13 + 15 + 17 + ...</h3>

=====================================================

Explanation:

We're adding terms in the form (2n+5)

The first term is when n = 3, so

2n+5 = 2*3+5 = 6+5 = 11

The next term is when n = 4, so

2n+5 = 2*4+5 = 8+5 = 13

The next term is when n = 5, so

2n+5 = 2*5+5 = 10+5 = 15

And so on

This means,

$\displaystyle \sum_{n=3}^{\infty} (2n+5) = 11+13+15+17+\ldots$

which matches with choice C. The three dots indicates the pattern goes on forever.

-------------------

Choice B does not have these dots, so that's why choice B is not the answer. If we replaced the infinity symbol with 7, then choice B would be the answer.

I.e,

$\displaystyle \sum_{n=3}^{7} (2n+5) = 11+13+15+17+19$