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3 years ago

12

Which of the following is the solution?

1 answer:

Lina20 [59]3 years ago

6 0

Answer:

A is the answer

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What is the surface are for this figure??

UkoKoshka [18]

Answer:

31.5

Step-by-step explanation:

You need to first use the formula of calculating surface area of a cuboid

SA=2(lw+lh+wh)

now you put the values in as

H=3

W=1.5

L=2.5

You get 31.5

Hope this Helps!

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3 years ago

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Step-by-step explanation:

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3 years ago

Which sum will be irrational?

KengaRu [80]

The 2nd choice, square root of 19 plus 7/2

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4 years ago

Determine three numbers a , b , c

natta225 [31]

Since $a,b,c$ are in geometric progression, if $r$ is the common ratio between consecutive terms, then

$a=a$

$b = ar$

$c=ar^2$

Since $a,b,c$ are also in arithmetic progression, if $d$ is the common difference between consecutive terms, then

$a = a$

$b = a + d \implies d = b-a$

$c = b + d = a + 2d \implies c = a + 2(b-a) = 2b-a$

Given that $abc=27$ , we have

$abc = a\cdot ar\cdot ar^2 = (ar)^3 = 27 \implies ar = 3 \implies a = \dfrac3r$

$b = \dfrac3r \cdot r = 3$

$c = \dfrac3r \cdot r^2 = 3r$

It follows that

$c = 2b-a \iff 3r = 6 - \dfrac3r$

Solve for $r$ .

$3r - 6 + \dfrac3r = 0$

$3r^2 - 6r + 3 = 0$

$r^2 - 2r + 1 = 0$

$(r-1)^2 = 0$

$\implies r=1 \implies a=b=c=3$

so the only possible sequence is {3, 3, 3, …}.

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2 years ago

7.5% of 268.75 equals what?

Papessa [141]

20.15625 is the answer to your question if you would like the method you move the percentage two decimal places and multiply.

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4 years ago