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3 years ago

Can someone please tell me if Question 7 and 8 are right? Can you also pleas explain quickly how?

Mathematics

1 answer:

alukav5142 [94]3 years ago

4 0

For 7 Yeah you're correct
You just need to implement the opposite
Since it's division then it turns to multiplication

For 8 also the same

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Somebody please help me what is 15 / 3 ×7/20

stellarik [79]

Answer:

1.75

Step-by-step explanation:

By Order of Operations, You read it left to right since Multiplication and Division are of the same importance. You would start with 15/3, which is 5.

Then your equation would be: 5*7/20.

Again, you would just read it left to right, 5*7=35

Then divide by 20, which is 1.75.

8 0

2 years ago

An anchor 15 m below the surface of the ocean is lowered 4. m. Then it is

Free_Kalibri [48]

Answer:

it 31 for sure but if not that than some thing is wrong

Step-by-step explanation:

15+12+4=31

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3 years ago

2(2x - 4) = 3(x + 4) Please solvvvvvve :'(

Zanzabum

1) $2(2x -4) = 3(x +4)


$

2) $4x - 8$

3) $3x+12$

4) $1x - 8 = 12$

5) $1x = 20$

Answer: $x = 20$

7 0

3 years ago

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I need to find the least common denominator of x+2/x^2+2x-3 , x-7/x^2+5x+6

grin007 [14]

Answer:

(x + 3)(x - 1)(x + 2)

Step-by-step explanation:

The fractions are:

$\dfrac{x + 2}{x^{2} + 2x - 3} \text{ and } \dfrac{x - 7}{x^{2} + 5x + 6}$

Factor each denominator

$x^{2} + 2x - 3 = (x + 3)(x - 1)\\x^{2} + 5x + 6 = (x + 3)(x + 2)$

We must find the least common multiple of the denominators. We take the maximum power of each separate factor.

Factors of first fraction = (x + 3) × (x - 1)

Factors of second fraction = (x + 3) × (x + 2)

LCM = (x + 3)(x - 1)(x + 2)

The lowest common denominator of the two fractions is (x + 3)(x - 1) (x + 2).

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3 years ago

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dezoksy [38]

Answer:

(-1,1)

Step-by-step explanation:

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3 years ago

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