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3 years ago

How is the following worked out? 9 x 9 + 9 / 9 - 9 =

2 answers:

6 0

Following PEMDAS, it states that you should start with parenthesis first. In this case, there are none, so you find exponents. Again, there isn't any, so you move onto multiplication. And yes, there is.
Although, keep in mind that if there is multiplication and division, you don't ALWAYS do multiplication first. If there is both multiplication and division just start from the left to the right.
1) So, the first step to solving this problem is taking 9 x 9 which is 81.
2) The second step would be skipping over to the division and solve 9/9 which is 1.
3) Now, your equation is 81 + 1 - 9 =
4) The fourth step to solve this equation is follow pemdas and solve. PEMDAS states that you do addition before subtraction. Although, if there is addition and subtraction at the same equation just go from left to right.
5) 81 + 1 - 9 = 82 - 9 = 73

The answer would then be 73.

Sladkaya [172]3 years ago

5 0

Start from the beginning 9 x 9 is 72
72 + 9 is 81 Then 81 divide by 9 which is 9 then 9 - 9 Is 0
So the answer to that is 0 hope i helped! :)

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xenn [34]

Answer:

perimeter is 4 sqrt(29) + 4pi cm

area is 40 + 8pi cm^2

Step-by-step explanation:

We have a semicircle and a triangle

First the semicircle with diameter 8

A = 1/2 pi r^2 for a semicircle

r = d/2 = 8/2 =4

A = 1/2 pi ( 4)^2

=1/2 pi *16

= 8pi

Now the triangle with base 8 and height 10

A = 1/2 bh

=1/2 8*10

= 40

Add the areas together

A = 40 + 8pi cm^2

Now the perimeter

We have 1/2 of the circumference

1/2 C =1/2 pi *d

= 1/2 pi 8

= 4pi

Now we need to find the length of the hypotenuse of the right triangles

using the pythagorean theorem

a^2+b^2 = c^2

The base is 4 ( 1/2 of the diameter) and the height is 10

4^2 + 10 ^2 = c^2

16 + 100 = c^2

116 = c^2

sqrt(116) = c

2 sqrt(29) = c

Each hypotenuse is the same so we have

hypotenuse + hypotenuse + 1/2 circumference

2 sqrt(29) + 2 sqrt(29) + 4 pi

4 sqrt(29) + 4pi cm

3 0

3 years ago

Read 2 more answers

Factorise completely 12 x³y - 18 xy²

jarptica [38.1K]

Answer:

6xy(2x²-3y)

Step-by-step explanation:

factorized completely

6 0

2 years ago

HELLLLLPPPPP: ANSWER CHOICES BELOW:

posledela

he polynomial x(5x² + 10x + 15), it is not completely factored, 5x² + 10x + 15 can still be factored into two binomials.

<h3>Polynomial</h3>

Polynomial is an expression that involves only the operations of <em>addition, subtraction, multiplication </em>of variables.

Given the polynomial x(5x²+10x+15), it is not completely factored, 5x²+10x+15 can still be factored,

Find out more on Polynomial at: brainly.com/question/2833285

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2 years ago

What is the complete factorization of the polynomial below

zepelin [54]

Answer:

B. (x+4)(x+i)(x-i)

Step-by-step explanation:

Let $P(x)=x^3-4x^2+x-4$

We can factor this polynomial by grouping:

$P(x)=x^2(x-4)+1(x-4)$

We factor further to obtain:

$P(x)=(x^2+1)(x-4)$

$P(x)=(x^2-\sqrt{-1}^2)(x-4)$

We apply difference of two squares to get:

$P(x)=(x-i)(x+i)(x-4)$

7 0

3 years ago

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Need help with working perimeter and area please

SVETLANKA909090 [29]

Answer:

Area = 228 m²

Perimeter = 60 m

Step-by-step explanation:

The figure given shows a rectangle that has a cut triangular portion.

✔️Area of the figure = area of rectangle - area of the triangular cut portion

= L*W + ½*bh

Where,

L = 20 m

W = 12 m

b = 20 - (8 + 8) = 4 m

h = 6 m

Plug in the values

Area = 20*12 - ½*4*6

Area = 240 - 12

Area = 228 m²

✔️Perimeter = perimeter of rectangle - base of the triangular cut portion

= 2(L + W) - b

L = 20 m

W = 12 m

b = b = 20 - (8 + 8) = 4 m

Plug in the values

Perimeter = 2(20 + 12) - 4

= 2(32) - 4

= 64 - 4

Perimeter = 60 m

5 0

3 years ago