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3 years ago

What’s the first 1st term in the sequence given by :T(n)=n^2-4 Pls help

Mathematics

1 answer:

Zepler [3.9K]3 years ago

8 0

First term = T(1) is obtained by plugging n = 1 into the formula,

thus First term = 1^2 - 4 = 1 - 4

= 3 (answer)

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Surface area of hemisphere with diameter of 18

saul85 [17]

Answer:

In terms of pi: 243 $\pi$

in decimal form: 763.407

Step-by-step explanation:

to find surface area of a hemisphere the formula is,

$3\pi r^{2}$

diameter (d) = 18

radius = d / 2 = 18 / 2

radius = 9

$3\pi (9)^{2} \\3\pi (81)\\243\pi \\OR\\763.407$

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2 years ago

PLEASE HELP! I WILL GIVE BRAINLIEST

larisa86 [58]

Answer:

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Step-by-step explanation:

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3 years ago

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Find the area of a triangle whose sides are 5 m, 6 m and 9m,( use root 2 =-1.41 m)

dlinn [17]

The area of the triangle is 14.1 square meters

<h3>How to determine the triangle area?</h3>

The side lengths are given as:

5m, 6m and 9m

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s = (5 + 6 + 9)/2

Evaluate

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The area is then calculated as:

$Area = \sqrt{s(s -a)(s-b)(s-c)$

This gives

$Area = \sqrt{10 * (10 -5)(10-6)(10-9)$

Evaluate the products

$Area = \sqrt{200$

Evaluate the exponent

Area = 14.1

Hence, the area of the triangle is 14.1 square meters

Read more about areas at:

brainly.com/question/27683633

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4 0

2 years ago

Given the function f(x) = -5|x + 11 + 3, for what values of x is f(x) = -12?

katen-ka-za [31]

Answer: B

Step-by-step explanation:

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3 years ago

2(n+5)=-2 step by step plz

Elodia [21]

Answer:

n=-6

Step-by-step explanation:

2(n+5)=-2

distribute

2(n+5)

2xn 2x5

2n+10

2n+10=-2

subtract 10 from both sides

10-10=0

-2-10=-12

2n=-12

divide each side by 2

2n/2=n

-12/2=-6

n=-6

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3 years ago