18 is 20℅ of what of number?

Answers

Answer 1

Answer: 18 is 20% of 90

Change the percentage into a decimal by dividing it over 100:
$(20)/(100) = 0.2$

Divide 18 by 0.2:
$(18)/(0.2) = 90$

Answer 2

Answer: 18 is 20% of 90.
18/90= 0.2 OR 20%

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A card was selected at random from a standard deck of cards. The suit of the card was recorded, and then the card was put back in the deck. The table shows the results after 40 trials.What is the relative frequency of selecting a club?

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Answers

the answer is d.) 20%

Explain how can you use the Associative Property to evaluate (7*50)*4.

Answers

The associative property is defined as follows: (a*b)*c = a*(b*c), that is, ... How can you use the Commutative property to find 5 x 4? Commutative property ... Which multiplication properties help evaluate 77 x 25 x 4? Distributive. Unless it's 77 x ...

The Associative Property of Mulitplication states that you can solve the expression by switching the group order. Since the current group is (7*50), we can change the group to (50*4).

From this: (7*50)*4

To This: 7*(50*4)

Hope this helps! Please correct me if I have made any mistakes!

half of Robert's piece of wire is equal to 2 thirds of Maria's wire. The total lenght of their wire is 10 feet. How much longer is Robert's wire than Maria's?

Answers

You have a system of equations here. R=Robert's piece of wire M=Maria's piece of wire

R/2=2M/3
and
R+M=10

With some basic algebra, you can make that first equation into
R=4M/3
then use substitution to get
(4M/3)+M=10
Then solve for M
(4M/3)+(3M/3)=10
7M/3=10
7M=30
M=30/7

so Maria's wire is 30/7 feet long. With a little more substitution, we can get:
R+(30/7)=10
R=10-(30/7)
R=(70/7)-(30/7)
R=40/7 feet long

So your final answer would be that Robert's wire is 10/7 feet longer than Maria's (which you could always put into decimal form)

Robert's wire is $1(3)/(7)$ longer than Maria's wire

Further Explanation

Let's say

Robert's wire = x

Maria's wire = y

From the problem given we know that:

$\boxed {(1)/(2) x = (2)/(3)y }\n \boxed {x + y = 10 }$

$\boxed {x = 10-y }$

So we get two equations:

$\boxed {(1)/(2) x = (2)/(3)y }\n\boxed {(1)/(2) (10-y) = (2)/(3)y } \n\boxed {5 - (1)/(2)y = (2)/(3) y }\n\boxed {5 = (2)/(3)y + (1)/(2)y }\n\boxed {5 = (7)/(6) y }\n\boxed { y= (30)/(7) }$

Let's subsitute the variable y into one of the equation above:

$\boxed {x + y = 10 }\n\boxed {x + (30)/(7) = 10 }\n\boxed { x = 10 -(30)/(7) }\n\boxed { x = (70-30)/(7) }\n\boxed { x = (40)/(7) }$

Robert's wire (x) is $(40)/(7)$ feet long and Maria's wire is $(30)/(7)$ long.

The difference between Robert's and Maria's is

$\boxed {= (40)/(7) - (30)/(7) }\n\boxed {= (10)/(7) }\n\boxed {= 1(3)/(7) }$

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Keywords: multi-step problem, fraction, part to whole relationship, mixed fraction, additional fraction, subtraction fraction from a whole number

NEED HELP 15 POINTS!!!

Answers

Circumference = diameter x PI

Circumference = 3.14 x 68 yards = 213.52 yards.

Area = PI x r^2

r = 1/2 the diameter = 1/2 x 68 = 34 yards.

Area = 3.14 x 34^2 = 3.14 x 1156 = 3629.84 yards^2

Explain why 2 x 3/8 is equivalent to 2 x 3 x 1/8 ?

Answers

If you put the 2 over 1 in 2 x 3/8 and multiply cross like normal fractions, you will get 6/8. This reduces to 3/4. Similarly, if you multiply 2 x 3, you get 6. Put the 6 over 1 and multiply by 1/8 to get 6/8 as an answer which reduces to 3/4 as well.

2x + 3 = 8

Transpose 3

2x + 3 - 3 = 8 - 3

2x = 5

Divide both sides of the equation by 2

2x / 2 = 5 / 2

x = 5 / 2

x = 2 1/2

which of the following has a value greater than 5/6?

5/9

2/3

11/12

10/12

Answers

11/12 has a greater value than 5/6

2/3 = 66%

5/9 = 55% NOT
2/3 = 66% EQUAL
11/12 = 91.6% YES
10/12 = 83.3% YES

Happy to HELP

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