MATHEMATICS MIDDLE SCHOOL

Eli had $10, but he lost some of it. His mom doubled the money he had left. Eli wrote the expression 2(10 – k) to show how much money he has now, where k is the amount of money he lost. Aisha wrote another correct expression, 20 – 2k, to also show how much money Eli has now.

Answers

Answer 1

Answer:

Answer:

Please see picture below.

Step-by-step explanation:

Answer 2

Answer:

Answer:

Both the equations would work

Step-by-step explanation:

If you want to see if both the equations would work, just try plugging in numbers. If you plug in 5, the first equation would give you 10 and the second equation would give you 10 too. This would be the same for every number. This shows that they were both right and both the equations are the same. All Aisha did was distribute the 2 onto both variables in the parenthesis.

Related Questions

Help ^^^ use picture above
A store marks up an item from $50 to $100. a. What is the percentage increase? b. $100 is what percentage of $50?
Subtract the quotient of 18 and 2 from the sum of 22 and 9. A. 22 B. 23 C. 4 D. 5
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Complete the sentence 0.04 is 1\10 of

solve the equation for x. show each step of the solution. name the justification for each step of the solution 9/2 (8-x) +36=102-5/2(3x+24)

Answers

1. You have the following equation:

$(9)/(2)(8-x)+36=102-(5)/(2) (3x+24)$

2. First, you must apply the Distributive property:

$(72)/(2)-(9x)/(2)+36=102-(15x)/(2)-(120)/(2)$

3. Simplify:

$36}-(9x)/(2)+36=102-(15x)/(2)-60$

3. Add the like terms:

$-(9x)/(2)+(15x)/(2)=102-60-36-36\n 3x=-30$

4. Solve for $x$ :

$x=-(30)/(3) \n x=-10$

Therefore, the answer is: $x=-10$

Ally is making a scale diagram of her classroom. She uses a scale factor of 3 centimeters per foot to draw the diagram. The actual length of the classroom is 18 feet, and its width is 20 feet. What is the area of the scale drawing of the classroom?

Answers

Multiply 18 * 3 and 20 * 3

18*3 = 54

20 * 3 = 60

Length = 54 cm ; Width = 60 cm

Area = L x W

54 * 60 = 3240

Area = 3240 cm

Question is in the picture

Answers

x cannot be greater than the sum of the two other sides.
x cannot be less than the difference of the two sides.

sum of the two sides which is 10.5
difference of the two sides which is 5.5

meaning, the answer is

5.5 < x < 10.5

6(p÷x) - 2x , if p = 6 and x = 3

Answers

Answer: I do declare the answer it's 6

Step-by-step explanation:

1) plug in 6 for p and plug in 3 for x.

You get:

6(6 ÷ 3) - 2(3)

6(2) - 6

12 - 6 = 6

Answer:

u commented on one of my posts asking if i go to palcs and i do! cool B)

Step-by-step explanation:

Ben has a cell phone plan that provides 200 free minutes each month for aflat rate of $39. For any minutes over 200, Ben is charged $0.35 per minute.
Which of the following piecewise functions accurately represents charges
based on Ben's cell phone plan?
A. f (x) =
39, x> 200
39+. 35, x < 200
B. f (x) =
39, x 200
35(x-200), x > 200
C. f(x) =
39,
x200
35x, x > 200
D. f (x) =
39.x200
39+. 35(x-200), x > 2001