3 years ago

Any one good at factoring?

Mathematics

1 answer:

svetlana [45]3 years ago

8 0

The student went wrong in step three. the solutions should have been -3 and 5

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$12.95 multiplied by 7 days is $90.65
$2.25 multiplied by 4 days is $9
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101 is the answer of the question

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Write an equation of the line that passes through the point (1,3) and has a slope of -2

jek_recluse [69]

Answer:

y= -2x+1

Step-by-step explanation:

y=mx+b

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2 years ago

Find the value of 4x if x/2=3

Doss [256]

Answer:

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

x/2 = 3

x = 3×2

x = 6

Therefore

4x = 4 × 6

4x = 24

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3 years ago

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A student solved 3/x−4=x/7 in six steps, as shown.

Stolb23 [73]

Answer:

Option A.

Step-by-step explanation:

The given equation is

$\dfrac{3}{x-4}=\dfrac{x}{7}$

Step 1: Multiply both sides by (x-4).

$3=\dfrac{x(x-4)}{7}$

Step 2: Multiply both sides by 7.

$21=x(x-4)$

Step 3: Using distributive property.

$21=x^2-4x$

Step 4: Isolate all terms on one side.

$0=x^2-4x-21$

Step 5: Find factors by splitting the middle term.

$0=x^2-7x+3x-21$

$0=x(x-7)+3(x-7)$

$0=(x-7)(x+3)$

Step 6: Using zero product property, we get

$x=-3, x=7$

It means student solved the equation correctly.

Therefore, the correct option is A.

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3 years ago

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