(3x - 1)( x + 5)(4x - 3) = 12x^3 + 47x^2 - 62x +15 
(3x^2 – x + 15x - 5)( 4x – 3 ) = 12x^3 + 47x^2 - 62x +15 
(3x^2 + 14x - 5)( 4x – 3 ) = 12x^3 + 47x^2 - 62x +15 
12x^3 – 9x^2 + 56x^2 – 42x – 20x + 15 = 12x^3 + 47x^2 - 62x +15 
12x^3 – 47x^2 - 62x + 15 = 12x^3 + 47x^2 - 62x +15

8 0

3 years ago

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8(− 2 3 x + 6) = −9( 3 4 x − 8)

Travka [436]

Answer:

x=12/61

Step-by-step explanation:

subtract 48 from both sides

simplify

add 306 x to both sides

simplify

divide both side by 122

simplify

hope that helps btw / is a fraction line

4 0

3 years ago

Noah says that 9x − 2x + 4x is equivalent to 3x because the subtraction sign tells us to subtract everything that comes after 9x

Genrish500 [490]

Answer:

Noah's claim is correct

Step-by-step explanation:

B O D M A S - Brackets, Over, Division, Multiplication, Addition and Subtraction, this means that you must do the addition first.

2x+ 4x = 6x

9x - 6x = 3x

Noah is correct as the - sign tells us that you have to subtract everything after the 9x

Hope this is ok and helps a little bit

5 0

3 years ago

Claire and Malia are training for a race A)Claire runs 10 km in 1 hour. How many kilometers does she run in half an hour? In 2 1

andrey2020 [161]

Answer:

A) 5km, 25km B) 2.5km, 12.5km

Step-by-step explanation:

A)Claire runs 10 km in 1 hour.

she runs 10/2=5km in 1/2 hour.

in 2 1/2, she runs 10*2 1/2=25km

B)Malia runs 5 miles in 1 hour.

she runs 5/2=2 1/2km in 1/2 hour.

in 2 1/2, she runs 5*2 1/2=12 1/2km

4 0

3 years ago

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What decimal is equivalent to 5/7​

What decimal is equivalent to 5/7