What all the multiples of 81?

Answers

Answer 1

Answer: 3,9,27 ( the 9 can be multiplied by itself to get 81 9*9)

Answer 2

Answer: 3,9,27 are the answers of the multiples of 81

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What times what equals -144 and adds to equal -24

Answers

x+x=-24\\ x\cdot x = 144\\ \\ 2x=-24 \ \ /: 2\ \\x^2=144 \\ \\x=-12\\( -12)^2 =144\\ \\x=-12\\ \\144 =144 \\ \\ Answer :\ it \ is \ ( -12)

The value of two numbers are, 12 and - 36

We have to give that,

Multiplication of two numbers = - 144

And, Add two numbers = - 24

Let us assume that,

Two numbers are x and y.

Hence,

xy = - 144 .. (i)

x + y = - 24

x = - 24 - y .. (ii)

From (i),

y (- 24 - y) =- 144

- 24y + y² = -144

y² - 24y + 144 = 0

y² - 12y - 12y + 144 = 0

y (y - 12) - 12 (y - 12) = 0

(y - 12) (y - 12) = 0

y = 12

From (ii),

x + y = - 24

x + 12 = - 24

x = - 24 - 12

x = - 36

Hence, Two numbers are, 12 and - 36

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a) six pens and five pencils cost $2.50 while three pens and two pencils cost $1.15 . what will be the cost of a pen and 4 pencils . please help me

Answers

x - pen
y - pencil

$6x+5y=2.5\n 3x+2y=1.15\n\n 6x+5y=2.5\n -6x-4y=-2.3\n --------\n y=\$0.2\n\n 6x+5\cdot0.2=2.5\n 6x+1=2.5\n 6x=1.5\n x=\$0.25\n \nx+4y=0.25+4\cdot0.2=\boxed{\$1.05 }$

Let pen's cost be x and pencil's cost be y.

6x + 5y = 2.50
3x + 2y = 1.15

Thus, 3x = 1.15 - 2y
Therefore, 6x = 2.30 - 4y

Substituting the value of 6x ;

(2.30 - 4y) + 5y = 2.50

or, 2.30 + y = 2.50

=> y = 0.20.

Substituting the value of y ;

6x = 2.30 - 4(0.20)
6x = 2.30 - 0.80 = 1.5
6x = 1.5
=> x = 0.25

Thus, 1 pen costs 0.25 $ and 1 pencil costs 0.20$.

Thus, cost of one pen is 0.25$.
Cost of 4 pencils is 0.80 $

0.25$ + 0.80$ = 1.05$

A student model the relationship in the table with the equation x = 4y. Explain the student's error. Write and equation that correctly models the relationship.

Answers

A student model relationship with equation y=4x

After cutting the recipe in half, ricardo needed 3 cups of flour.

Answers

x* $(1)/(2)$ =3
You divide each side by $(1)/(2)$
x=3× $(1)/(2)$
3÷ $(1)/(2)$ =6
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Which is the area of the figure? Can Someone Please Help Me. A. 192 square inches
B. 324 square inches
C. 392 square inches
D. 480 square inches

Answers

The area of the figure is :[ 24 in x (4 in +4 in +12 in)] - (12 in x 13 in)=
=(24 in x 20 in) - (12 in x 13 in)=480 in² - 156 in²=324 in².

Answer: B. 324 in²

What is the absolute value of |-22| , |-66|, and |48|

Answers

The answer is 22, 66, -48

22,66, and 48
|-22|=22
|-66|=66
|48|=48

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