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Arte-miy333 [17]
4 years ago
9

A student solved the problem below but made anerror. - 3x = 12+3 +3x = 15​

Mathematics
2 answers:
garik1379 [7]4 years ago
5 0

Answer:

Division should be used instead of multiplication

-3x=12

x=-4 (divide by -3)

nataly862011 [7]4 years ago
4 0

Because -3x is one term, you need to divide both sides by -3, not add 3 to both sides:

-3x = 12

Divide both sides by -3:

-3x/3 = 12/-3

x = -4

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The balcony of an apartment is 4 feet by 7 feet. On a scale drawing of the apartment, the balcony is 0.8 inch by 1.4 inches, and
-Dominant- [34]

Answer:

The actual dimensions of the kitchen are 12\ ft by 14\ ft

Step-by-step explanation:

step 1

Find the scale  of the drawing

To find the scale , remember that is equal to the ratio of  the corresponding dimension in the drawing divided by the corresponding actual dimension

so

\frac{0.8}{4}\frac{in}{ft}=0.2\frac{in}{ft}

step 2

To find the actual dimensions of the kitchen, divide the dimension in the drawing by the scale

so

2.4\ in=2.4/0.2=12\ ft

2.8\ in=2.8/0.2=14\ ft

6 0
3 years ago
Help, 50 points
AnnyKZ [126]

Answer:

above is the solution to the question

5 0
3 years ago
Help i gotta get it turned in soon​
Katen [24]

Answer: Ill be glad to help but i need a better picture of the whole thing

Step-by-step explanation:

4 0
3 years ago
GUYS Pls answer this I am having a final math exam soon Pls answer this anyone. I will mark brainiest pls:
Anna11 [10]

Answer:

1)20 000 000×12cm

240 000 000/100m

240 000 0/1000

2400km

31.6--1580×100×1000

31.6--1580 00 000

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8 0
3 years ago
(x - 1)2 = 4<br> how do i do this
Gnoma [55]

Answer:

x = 3

Step-by-step explanation:

(x - 1)2 = 4

how to get this solved is very simple.

first step to apply is the BODMAS RULE

B..................... bracket

O..................... of

D.....................Division

M.................... multiplication

A..................... addition

S.................... Subtraction

so (x - 1)2 = 4

we have,

2x - 2 = 4 ( by opening the bracket)

collect the like terms

2x = 4+2

divide both sides by 2

2x/2 = 6/2

x = 3

to check if your answer is correct put the value of x = 3 into the question and see if the right hand side will equal to the left handside

(x - 1)2 = 4

(3-1)2=4

2(2)=4

4=4.............................. proved

8 0
4 years ago
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