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ryzh [129]
2 years ago
11

X²-4 this is the difference of square help please

Mathematics
1 answer:
fenix001 [56]2 years ago
3 0

Answer:

(x - 2)(x + 2)

Step-by-step explanation:

If this is a difference of squares, it factors like this.

(x - 2)(x + 2)

The general rule is x^2 - a^2 factors into sqrt(x^2) +/- sqrt(a^2)

That always produces 2 factors: (x + a)(x - a)

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Which ratio forms a proportion with 18/27
JulsSmile [24]

Answer:

\frac{2}{3}

Step-by-step explanation:

The given ratio is \frac{18}{27}

9 is the common factor of 18 and 27

divide numerator and denominator by 9

\frac{18/9}{27/9} =\frac{2}{3}

hence \frac{2}{3} is proportion with \frac{18}{27}

6 0
3 years ago
Given the following system of equations: −x + y = 2 2x + 4y = 32 What action was completed to create this new equivalent system
tiny-mole [99]

Answer:

you just need to devide by 2 the second equation

Step-by-step explanation:

  • -x + y = 2 (you leave it as it is)

  • 2x + 4y =32 => 2x/2 +4y/2 = 32/2

=> x + 2y =16

we can devide or multiply in an equation by any number we want, as long as we do it to every term.

6 0
3 years ago
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Find the perimeter of this figure. Enter your answer in the box.
diamong [38]

Answer:

56 total units

Step-by-step explanation:

Here is what the plane would look like if the figure and points were drawn.

3 0
2 years ago
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Estimate ∫20(4x2−2x)dx= using a left Reimann Summ and 4 equal subintervals.
dolphi86 [110]

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3 0
3 years ago
A student's course grade is based on one midterm that counts as 15% of his final grade, one class project that counts as 15% of
kow [346]

Answer:

Overall final score = 77.75% ; Grade = C.

Step-by-step explanation:

The approach to solve this question is to realize that the marks have to be converted into the respective percentages of the whole course. This means that the marks of all the components have to be normalized according to the grading breakdown.

Project Marks = 97/100. Weightage = 15%. So 97*15/100 = 14.55/15.

This means that the student received 14.55 marks in the project out of 15.

Similarly for other components:

Mid-Term Marks = 83/100. Weightage = 15%. So 83*15/100 = 12.45/15.

Homework Marks = 82/100. Weightage = 35%. So 82*35/100 = 28.7/35.

Finals Marks = 63/100. Weightage = 35%. So 63*35/100 = 22.05/35.

After the conversion process, add up the normalized marks, which are now acting as the percentages earned in all the components.

Aggregate Percentage = 14.55 + 12.45 + 28.7 + 22.05 = 77.75%.

According to the grade scale, the student receives a C because 70 is less than 77.75 and 77.75 is less than 80.

Summarizing, the student receives a C at 77.75%!!!

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