Kelsey is thinking of a number. she says that the sum of a number and 9, multiplied by 2/3 is equal to -18

the number is -36

Step-by-step explanation:

(x+9) . 2/3 = -18

x+9 = -18 . 3/2

x = -9 .3 -9

x= -36

The number is -36

Step-by-step explanation:

To solve this problem, we will follow the steps below;

First, we need to re-write the problem in a mathematical format.

Let x be the number

"Kelsey is thinking of a number. She says that the sum of a number and 9, multiplied by 2/3 is equal to -18"  can be mathematically written as;

 =   -18

Open the bracket

 +  6  = -18

subtract 6 from both-side of the equation

 +  6 - 6 = -18-6

   = -24

Multiply both-side of the equation by 3

 × 3 = -24×3

2x = -72

Divide both-side of the equation by 2

=

x = - 36

The number is -36

12

Step-by-step explanation:

18 x 2/3 = 36/3 = 12

2/3 of 18

2/3×18

2×6

12

hope this helps:)

The messenger should use addition and Subtraction instead of multiplication and division

Step-by-step explanation:

It is given that,

A biker can ride a bicycle 18 miles in 3 hours. the messenger estimates that it will take 7 hours to bike 22 miles.

He has done two steps :

step 1: 22-18=4

step 2: 3+4=7

The steps done by the biker are wrong. The correct step should be :

In 1 hour, he should cover (18/3) miles i.e. 6 miles

In 7 hours, he will cover (6×7) miles i.e. 42 miles

It means he should use addition and Subtraction instead of multiplication and division. Hence, the correct option is (c).

Could you rewrite this? What's supposed to be between 2x^2 and 3^x? it looks like a jumbled mess.