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3 years ago

Expand. If necessary, combine like terms. (x+3)(x – 3) = ?

Mathematics

2 answers:

zhannawk [14.2K]3 years ago

8 0

Answer:

i did it on khan

Step-by-step explanation:

its x^2=9

Kobotan [32]3 years ago

5 0

Step-by-step explanation:

multiply it

x²-3x+3x-9=0

x²-9=0

x²=9

square root both side we get

x=3

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Sally went to the clearance rack at a department store and found a shirt she wanted to buy. The shirt was $36.00 and is on sale

jeka57 [31]

Answer:

33.34%.

Step-by-step explanation:

Given that,

The actual price of the shirt = $36

Price on sale = $24

We need to find the percent of the decrease. The formula for the percentage is given by :

$\%=\dfrac{|\text{actual value-estimated value}|}{\text{actual value}}\times 100$

Putting all the values,

$\%=\dfrac{24-36}{36}\times 100\\\\=33.34\%$

So, the percentage decrease in the price of the shirt is 33.34%.

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3 years ago

Which situation could be represented by the equation 32.4 = 8.1x?

Oduvanchick [21]

Answer:

C or A

Step-by-step explanation:

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3 years ago

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An orange has about 1/4 cups of juice.Hiw many Oranges are needed to make 2 1/2 cups of juice?

marysya [2.9K]

Answer:

10/4 cups of juice

Step-by-step explanation:

4/4 = 1

so 4/4 + 4/4 = 2

and 1/2 = 2/4

then add

4/4 + 4/4 + 2/4 = 10/4

7 0

3 years ago

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A cuboid has a length of 25cm, a width of 5cm and height of (x-2)cm

mr Goodwill [35]

Step-by-step explanation:

Hi there!

From above question;

A cuboid has a length of 25cm, a width of 5cm and height of (x-2)cm.

Length (l) = 25cm

width (b) = 5cm

height (h) = (x-2)cm.

a).

Volume= l*b*h

V = 25*5*(x-2)

V = 125(x-2)

V = 125x - 250 → Answer

b).

(i)

V = 750cm³

V = 125x - 250

750 = 125x - 250..........(i)

(ii)

The equation (i) is: 750 = 125x - 250

or, 125x = 750+250

or, 125x = 1000

or, X = 1000/125

Therefore, X= 8cm.

(iii)

Height (h) = x-2

= 8-2

= 6

Therefore, height is 6cm.

Hope it helps!

6 0

3 years ago

Which frequency table represents the set of data below related to how each student in a class travels to school in the morning

Scilla [17]

Answer:

see below (first table shown)

Step-by-step explanation:

All of the frequency tables have the same numbers in the first and last categories, so choosing the correct table can be done by counting instances in any of the middle three categories.

We note there are 5 who biked to school, so the first table is indicated as being correct.

_____

If you complete a frequency table, you find that it matches the first table shown.

7 0

3 years ago