3 years ago

Find the incorrect step in each solution and explain whit it is incorrect.

Mathematics

1 answer:

julsineya [31]3 years ago

3 0

Answer:

Step-by-step explanation:

Mai:

She subtracted 5x instead of distributing. This is incorrect, because since it is in ( ), it has to be multiplied by 3.

Correct: 3(5x + 9) = 15x + 27

12x + 3 = 15x + 27

Noah:

Added 15x instead of subtracting. This is incorrect, because to combine like terms on each side you would add a negative number and subtract a positive number.

Correct: 12x + 3 = 15x + 27

12x - 15x = 27 - 3

-3x = 24

x = 24 / -3

x = -8

You might be interested in

How many solution are there to the equation below -46=3×+7

Archy [21]

Answer:

Only one

Step-by-step explanation:

46=3x+7 /-7

39=3x /:3

13=x

6 0

3 years ago

(PLEASE ANSWER QUICK) Which prisms do Sophia use exactly 18 unit cubes to build? Choose all the correct answers. The options are

creativ13 [48]

Last ones in each row

Step-by-step explanation:

count which figure has 18 cubes

First has 12

2nd one has 24

3rd one has 27

4th one has 18

5th one has 18

6 0

2 years ago

PLS HELP. DUE IN A FEW MIN!!!!!!!!! ILL GIVE BRAINLY CROWN THInGY.

choli [55]

Part A:it would be 32 dollars because 60 and 30 percent off is 42 dollars subtract 10 is 32

part b: yes it would be different the new total would be 35 because if you subtract 10 first it would be 50 then 30 percent off is 35

3 0

2 years ago

Read 2 more answers

Write two inequalities to compare -6 and 7

adell [148]

Here are 3 inequalities:

-6 < 7

7 > -6

-6 ≠ 7

6 0

3 years ago

In a (blank) , one ratio compares a part to a whole

Archy [21]

While it does sounds redundant, it could be a "part to whole" ratio

3 0

3 years ago