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3 years ago

Pls help its due in today i will give best brainliest

Mathematics

1 answer:

notsponge [240]3 years ago

3 0

Answer:

I will first divide the figure into two which gives me a rectangle and a semi circle

area of figure = area of rectangle + area of semi circle

= [(length × width)+(1/2πr²)]

[(10×15)+(1/2×22/7×5×5)]

[(150)+(39.29)]

= 189.3cm²

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The 3rd term of a geometric sequence is -1/3 and the 8th term is 81. what is the 11th term?

shepuryov [24]

Answer: $t_{11}=-2187$

Step-by-step explanation:

$t_{3}=-1/3$

That is :

$ar^{2} = -1/3$ ................. equation 1

Also

$t_{8}=81$

that is

$ar^{7}=81$ ................. equation 2

divide equation 2 by equation 1 , that is

$\frac{ar^{7}}{ar^{2}} = 81 / -1/3$

$r^{5}=$ $81$ x $-3/1$

$r^{5}= -243$

find the fifth root of both sides

$r = -3$

substitute $r = -3$ , into equation 1 to find a , that is

$a(-3^{2})= -1/3$

$9a = -1/3$

multiply through by 3

$27a = -1$

$a =- 1/27$

To find the 11th term , the formula for the 11th term is given as :

$t_{11}=ar^{10}$

$t_{11}= -1/27(-3^{10})$

$t_{11}=-2187$

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4 years ago

Which statements about squares and equilateral triangles are true?

12345 [234]

Answer,a and b, sorry if they are wrong

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3 years ago

700 – 35w = 450 + 15w

mihalych1998 [28]

Answer:

Step-by-step explanation:

700-35w=450+15w

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Rudik [331]

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Step-by-step explanation:

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