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Mathematics 20 Online
OpenStudy (anonymous):

34 + 3 ⋅ 5

OpenStudy (priyar):

what is 3*5?

OpenStudy (anonymous):

3 times 5

OpenStudy (priyar):

yes..what is the answer to 3 times 5?

OpenStudy (anonymous):

15

OpenStudy (priyar):

good!now add this to 34..what do u get?

OpenStudy (anonymous):

34 + 15 = 49

OpenStudy (priyar):

Great!..thats the answer..remember we must do multiplication first compared to add/sub..bascically we are following..BODMAS rule

OpenStudy (anonymous):

One more

OpenStudy (anonymous):

Which of these shows 8 + 3m rewritten using the commutative property of addition? 8m + 3 8 - 3m 3m - 8 3m + 8

OpenStudy (priyar):

what is commutative propety?

OpenStudy (anonymous):

Changing the order of the addends in a sum does not change the answer; a + b = b + a. Example: 8 + 3 = 3 + 8 or x + 3 = 3 + x.

OpenStudy (priyar):

wonderful! then apply the same for this eq its similar to the examples u gave..

OpenStudy (anonymous):

so its om 3m + 8

OpenStudy (priyar):

ya correct! good job

OpenStudy (anonymous):

What is the value of fraction 1 over 3x3 + 5.2y when x = 3 and y = 2? 13.4 16.4 19.4 28.4

OpenStudy (priyar):

did u try this one?

OpenStudy (anonymous):

don't know?

OpenStudy (priyar):

no..have u tried doing it..?

OpenStudy (anonymous):

no

OpenStudy (anonymous):

let me try then

OpenStudy (priyar):

try it ..it seems simple i think u can do..always try at least twice before u ask

OpenStudy (anonymous):

0.3 * 3 the power of three + 5.2 * 2 =?

OpenStudy (anonymous):

help

OpenStudy (anonymous):

what the?

OpenStudy (priyar):

just plug in the values of x and y

OpenStudy (anonymous):

@skullpatrol what are you doing??

OpenStudy (anonymous):

to what an outlet

OpenStudy (skullpatrol):

$$\huge \dfrac{1}{3} x^3 + 5.2y$$

OpenStudy (priyar):

\[1/(3x^{3} + 5.2y)\] this is ur q right?

OpenStudy (priyar):

if what @skullpatrol has written is ur q..then what u did is correct! just evaluate it to find the answer

OpenStudy (priyar):

ok?

OpenStudy (anonymous):

add

OpenStudy (priyar):

?

OpenStudy (anonymous):

1/3x3+5.2y

OpenStudy (priyar):

ok then what u told me is correct proceed with it

OpenStudy (anonymous):

so i add them

OpenStudy (skullpatrol):

$$\huge \dfrac{1}{3} 3^3 + 5.2•2$$

OpenStudy (anonymous):

ok

OpenStudy (priyar):

yes

OpenStudy (anonymous):

i got 20.3 i don't know how

OpenStudy (anonymous):

what is 1/3 in numbers

OpenStudy (skullpatrol):

0.333...

OpenStudy (anonymous):

i got 20.399

OpenStudy (anonymous):

hello

OpenStudy (skullpatrol):

$$\huge \dfrac{1}{3} 3*3*3 + 5.2•2$$

OpenStudy (skullpatrol):

What is 1/3 • 3 = ?

OpenStudy (anonymous):

0.9

OpenStudy (skullpatrol):

1/3 = 0.333.. 3(1/3) = 3(0.333...) = ?

OpenStudy (anonymous):

?

OpenStudy (anonymous):

one third??

OpenStudy (skullpatrol):

One third times 3

OpenStudy (skullpatrol):

1/3 + 1/3 + 1/3 = ?

OpenStudy (anonymous):

one

OpenStudy (skullpatrol):

Correct :-)

OpenStudy (anonymous):

ok now what

OpenStudy (skullpatrol):

$$\huge \dfrac{1}{3} •3•3•3+ 5.2•2$$

OpenStudy (anonymous):

19.4 :)

OpenStudy (anonymous):

ok another one

OpenStudy (anonymous):

If x = 2.7, 5x = ____.

OpenStudy (skullpatrol):

Any ideas? :-)

OpenStudy (anonymous):

13.5

OpenStudy (anonymous):

What is the coefficient of y in the expression 1 ⋅ 4 + 7y? 1 4 7 11

OpenStudy (anonymous):

@skullpatrol

OpenStudy (skullpatrol):

?

OpenStudy (anonymous):

Which expression shows a sum of three terms? 3x 3 + x 3 + x + 9 x the power of 3

OpenStudy (anonymous):

hello?? its me

OpenStudy (skullpatrol):

Any ideas? :-)

OpenStudy (anonymous):

no and what took you so long

OpenStudy (skullpatrol):

Got logged out :(

OpenStudy (anonymous):

ok

OpenStudy (skullpatrol):

In the sum a + b, a and b are called terms.

OpenStudy (anonymous):

there is is no a or b. just x

OpenStudy (skullpatrol):

a, b, c, x, y, z are all letters called variables.

OpenStudy (anonymous):

ok

OpenStudy (skullpatrol):

In the sum x + y, x and y are called terms.

OpenStudy (anonymous):

thx

OpenStudy (anonymous):

so its a ???

OpenStudy (anonymous):

or d

OpenStudy (skullpatrol):

Three terms means three things added together.

OpenStudy (anonymous):

so d right?

OpenStudy (skullpatrol):

x + y + z

OpenStudy (anonymous):

hello

OpenStudy (skullpatrol):

Nope, d is a power.. Which means multiply together, right?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

so a

OpenStudy (anonymous):

i think

OpenStudy (skullpatrol):

Which one has 3 things added together?

OpenStudy (anonymous):

c

OpenStudy (anonymous):

ok

OpenStudy (skullpatrol):

Correct :D

OpenStudy (anonymous):

The expression to find the perimeter of a rectangle is 2(length + width). What is the perimeter, in units, of a rectangle of length 1/5 unit and width 1/2 unit? 1 2/5 1 1/5 4/7 2/7

OpenStudy (anonymous):

@skullpatrol

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (anonymous):

no

OpenStudy (skullpatrol):

Try please :-)

OpenStudy (anonymous):

it seems hard :(

OpenStudy (skullpatrol):

Use the given formula.

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