3 years ago

HELPPP!!!!!

Mathematics

1 answer:

shtirl [24]3 years ago

7 0

42 is the LCD of all the above fractions.

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Work out 25% of £18

konstantin123 [22]

It’s £4.5

Convert 25 to a decimal so 0.25

0.25 x 18 = 4.5

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You need to arrange tenten of your favorite books along a small shelf. how many different ways can you arrange the? books, assum

jok3333 [9.3K]

That is permuations

that would be 10! or 10*9*8*7*6*5*4*3*2*1=3628800 ways

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A box has a volume of 546cm3 and a surface area of 422cm2. What are the Length, Width and Height?

Klio2033 [76]

We know that the formula for the volume of a box is:

$V =lwh$

Where:
l = length
w = width
h = height

The formula of the surface area of a box is:
$SA=2(lw+lh+wh)$

Based on the given we know the following:
$546cm^{3} =lwh$

and

$422cm^{2}=2(lw+lh+wh)$

If we factor out the given volume, you can come up with 3 numbers that will satisfy the surface area formula:

$546=6*7*13$

Let:
l = 6cm
w = 7cm
h = 13cm

Now let's try this on the surface area formula:
$422cm^{2}=2(lw+lh+wh)$
$422cm^{2}=2((6cm*7cm)+(6cm*13cm)+(7cm*13cm))$
$422cm^{2}=2(42cm^{2}+79cm^{2}+91cm^{2})$
$422cm^{2}=2(211cm^{2})$
$422cm^{2}=422cm^{2}$

The answer is then:
l = 6cm
w = 7cm
h = 13cm

Any order would be fine.

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3 years ago

Evaluate the function.<br> f(x) = -x^2 - 4x + 13<br> Find f(3)

julia-pushkina [17]

Answer: i believe the answer is 10

Step-by-step explanation:

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2 years ago

Hayden has 6 rolls of dimes. There are 50 dimes in each roll. How many dimes does he have altogether?

Aleks04 [339]

6 times 50 is 300, there’s your answer. He was 300 dimes altogether.

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