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Simora [160]
3 years ago
12

Find 85^2 using mental math. a. 5,625 b. 7,225 c. 6,825 d. 6,400

Mathematics
2 answers:
Nat2105 [25]3 years ago
7 0
B bro 7,225. 85x85 should do the trick:)
RSB [31]3 years ago
5 0

Answer:

7,225

Step-by-step explanation:

find 85^2 using mental math

85^2 = 85 * 85

85 can be written as 80 +5

(80+5)(80+5)

Multiply each term inside the parenthesis

Multiply 80 with 80 +5 and then we multiply 5 with 80 +5

It becomes

6400 + 400+400+ 25

Now we add all the numbers

7,225

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-1/2 divided by 1 3/4 as a fraction in simplest form
Helen [10]

\Large\textsf{\textbf{Answer\;:}}}

\large\textsf{refer\:to\:the\:"calculations"\:section\:of\:this\:ans}

\Large\textsf{\textbf{Calculations\::}}

-\displaystyle\frac{1}{2} :1\frac{3}{4}

First , convert the mixed number (the fraction we are dividing by in the given maths problem) into an improper fraction .

Multiply the whole part (1) times the denominator (4) and add the numerator . The result is the numerator of our fraction , and the denominator stays the same .

So now our maths problem looks as follows :

-\displaystyle\frac{1}{2} :\frac{7}{4}

Now turn the fraction you are dividing by over :

-\displaystyle\frac{1}{2} *\frac{4}{7}

Now multiply the numerator of the first fraction times the numerator of the second fraction :

4

Perform the same operation with the denominators :

-4/14

So the result is :

-\displaystyle\frac{4}{14}

Since the above fraction is not in it's simplest form , we divide the top and bottom by 2 (a common factor of both 4 and 14) :

-\displaystyle\frac{2}{7}

\footnotesize\textsf{hope\:helpful~}

8 0
3 years ago
Select the correct answer.
Iteru [2.4K]

Answer:

А.(x-6)(x2 + 6x + 36)

Step-by-step explanation:

Remember this formula for factorizing difference of 2 cubes:

a

3

−

b

3

=

(

a

−

b

)

(

a

2

+

a

b

+

b

2

)

In

x

3

−

216

,

a

3

=

x

3

b

3

=

216

a

=

3

√

x

3

=

x

b

=

3

√

216

=

6

Substitute

a

=

x

,

b

=

6

into the formula of

(

a

−

b

)

(

a

2

+

a

b

+

b

2

)

(

x

−

6

)

(

x

2

+ (

6

x

x

) +

6

2

)

=

(

x

−

6

)

(

x

2

+

6

x

+

36

)

(

x

−

6

)

(

x

2

+

6

x

+

36

)

is the factorized form of

x

3

−

216

5 0
3 years ago
Read 2 more answers
8) find the volume of a prism
Eduardwww [97]

Answer:

I may be wrong but A

Step-by-step explanation:

3 0
3 years ago
An electronics company finds that 5 out of 1,535 capacitors produced are damaged. How many damaged items can they expect if the
Zepler [3.9K]

Answer:

the damaged items expected in the case when the 23,025 capacitors produced is 75

Step-by-step explanation:

The computation of the damaged items expected in the case when the 23,025 capacitors produced is shown below:

= (5 × 23,025 capacitors) ÷ (1,535 capacitors)

= 75

Hence, the damaged items expected in the case when the 23,025 capacitors produced is 75

6 0
3 years ago
Choose the point on the terminal side of -45°. (-3, -3) (4, -4) (5, 5) (-2, 2)
Sladkaya [172]
(4, -4) is the answer

-45<span>° is in quadrant IV and the point (4, -4) is the only point out of the points given that is also in quadrant IV</span>
4 0
3 years ago
Read 2 more answers
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