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3 years ago

Why can you use fraction multiplication to check the

Mathematics

1 answer:

LUCKY_DIMON [66]3 years ago

4 0

Answer:

Division and multiplication are inverse operations. This means they "undo" each other. You can check your answer by multiplying the quotient by the divisor. You should get the dividend.

have a great day :)

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HELP PLSSS THIS IS HARD SOMEONE

tia_tia [17]

Answer:

x,y - x,y-4

Step-by-step explanation:

x coordinates of a and b remain same but their y coordinates become -4

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3 years ago

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If three times a certain number is increased by 4 the results is 28. what is the number

dem82 [27]

the number is 8 because the equation is (x * 3) + 4 so replace x with (8) and its (8 * 3) + 4 = 28 :)

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4 years ago

Pls help me solve pls show how you got the answer

Dmitry [639]

Polynomial 1 : x²-x²+4x -2+1 = 4x -1

Polynomial 2 : 3x-x-2x²-2+1 = -2x²+2x-1

Polynomial 3 : 4 -2x+x-x²+x²-x² = -x²-x+4

According to the question,

Polynomial 1+Polynomial2+Polynomial3 + Polynomial4 = 6x

=> 4x -1+ (-2x²+2x-1) +(-x²-x+4) + Polynomial4= 6x

=> -3x²-x+2+Polynomial4= 0

<h2>=> 3x²+x -2= Polynomial4</h2>

OPTION B

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3 years ago

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The area of a rectangle is 30+12x what are 3 possibilities for the length and width of the rectangle

Stolb23 [73]

In order to find the three possibilities, you must first think of common factors between 30 and 12:

Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

Factors of 12: 1, 2, 3, 4, 6, 12

We can find three common factors between the two numbers: 2, 3, and 6. So these are three widths that we can use. The length can be found by factoring out the numbers from 30+12x (we can't factor out x):

30+12x=2(15+6x) Width: 2 Length: 15+6x

20+12x=3(10+4x) Width: 3 Length: 10+4x

20+12x=6(5+2x) Width: 6 Length: 5+2x

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4 years ago

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Lorico [155]

Answer:

The expressions include:

6x - 5

3x - 5 + 3x

-2x - 5 + 8x

Step-by-step explanation:

Please do see the attached for more explanation

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3 years ago