Mathematics High School

A student performed the following steps to find the solution to the equation
X2 - 2x - 8 = 0. Where did the student go wrong?
Step 1. Factor the polynomial into (x - 4) and (x - 2)
Step 2. X-4 = 0 and x - 2 = 0
Step 3. x = 4 and x = 2
A. in Step 2
B. in Step 1
C. The student did not make any mistakes, the solution is correct
D. in Step 3

Answers

Answer 1

Answer:(b) step 1

Step-by-step explanation:

Answer 2

The wrong step in the student's workings is step 1

How to determine the wrong step?

The equation is given as:

x^2 - 2x - 8 = 0

Expand the equation

x^2 + 2x - 4x - 8 = 0

Factorize the equation

x(x + 2)- 4(x + 2)

Factor out x + 2

(x - 4)(x + 2) = 0

The above means that the factored equation of x^2 - 2x - 8 = 0 is (x - 4)(x + 2) = 0

This means that the step 1 of the student's step is wrong and incorrect

Related Questions

A school library has 160 DVDs in its collection. Given that 45% of the DVDs are about science and 40% are about history, how many of the DVDs are about other subjects?

Answers

Answer:

24 DVDs

Step-by-step explanation:

45% of 160 = 72

40% of 160 = 64

72+64=136

160-136=24

24 DVDs

7 ¾ - 1 2/7 - 3/2 = ?????????????????????

Answers

Answer:

31/8 = 3 7/8 = 3.875

Step-by-step explanation:

7 3/4 /2 = 31/8 = 3 7/8 = 3.875

Tables
Х
у
6
4
8
12
12
24
16
30
Proportional
Not Proportional

Answers

the answer isNot proportional

Answer:

it's not proportional ...

please thnx my answer..

How much time has passed?
Start time: 4:45 a.m. End time: 7:25 a.m.

Answers

Answer:

160 mins

Step-by-step explanation:

Find the measure of the missing angle.

Answers

Answer:

U should do like this

90-51=39...

Answer: 39 degrees

Step-by-step explanation:

Right angle is 90 degrees so 51 plus a will equal 90

A is 39 degrees

Tell which number is greater.

60%, 5/8

Answers

Answer:

5/8 is greater

Step-by-step explanation:

hope that helps

A fish tank is 3 feet by 4 feet by 5 feet. How many cubic feet of water will it hold?

Answers

Answer:

60ft3

Step-by-step explanation:

Volume = length * breadth * height

= 3 * 4 * 5 = 60 (cubic ft)

Help me pls ASAP thank you have a great day!!

Answers

Answer:

Dude like I just answered the previous question. Try doing it by yourself. Lol

yo someone help me with my last question pls!!

Answers

Answer:

n7 is y

Step-by-step explanation:y

(-1/2 + 5/2) + a =0 solve for a

Answers

Answer:

a = -2

i hope this helps

Answer: a = - 2

Step-by-step explanation:

[tex]\bigg (-\dfrac{1}{2} +\dfrac{5}{2} \bigg )+ a=0\\\\ \dfrac{4}{2} +a=0\\\\2+a=0\\2+a-2=0-2\\a=-2[/tex]

What is the y-intercept of y = sinx?

Answers

Answer:

The y-intercept is 0

Step-by-step explanation:

Here, we want to get the y-intercept value of y = sin x

From the plot of the graph, we can see that the graph of sin x touches the y-axis at the point y = 0

So therefore, the y-intercept of y = sin x is 0

When a system of linear equations has a
solution.... what am I actually finding when I
solve for x and y?

Answers

Answer:

You are finding the intersection point of the system of linear equations.

Step-by-step explanation:

You can use methods like substitution, elimination, and/or equal values to find the solution for the system of linear equations.

Jane paid $40 for an item after she received a 20% discount. Jane's friend says this means that the original price of the item was $48. a. How do you think Jane's friend arrived at this amount?

Answers

Answer:

The discount is $8

Step-by-step explanation:

Step one

Given data

Jane paid $40 for an item after she received a 20% discount.

Required

The initial cost of the item

Now in other to check whether Jane's friend is correct, let us solve for the initiai cost as follows

Let the initial cost be x

20% of 40

20/100*40

=0.2*40= $8

Therefore the discount is $8

hence the original price is

discount+ discounted sale(amount paid)

=8+40

=$48

PLZZZZZ HELPPP ME WITH THISS!!!!!

Answers

done...

................

What is the best description of AB?

Answers

9514 1404 393

Answer:

F altitude

Step-by-step explanation:

AB is perpendicular to triangle base XZ, so is an altitude of the triangle.

Additional comment

B is not the midpoint of XZ, so AB is not the median and not a bisector of XZ. Likewise, AB is not the angle bisector of angle A. (The triangle would have to be isosceles for AB to be a perpendicular bisector, median, and angle bisector.)

Eliminating the choices that can't work leaves the one that does work. AB is the altitude.

Answer:

Altitude

Step-by-step explanation:

Can someone please help me with this

Answers

Answer:

Step-by-step explanation:

times 15 and 6 maybe

1 Evaluate the expression. r3 - 2s if r = 5 and s = 4

Answers

Answer:

117

Step-by-step explanation:

Given the expression

r³ - 2s ← substitute given values into the expression

= 5³ - 2(4)

= 125 - 8

= 117

Hey there! [tex]\bold{r = 5 ; s =4}[/tex][tex]\bold{5^3 -2(4)}\\ \\ \bold{5^3=5\times5\times5 \rightarrow 25\times5 = \underline{125}}\\\\\bold{2\times4=\underline{8}}\\\\\\\bold{125-8 = \underline{117}}\\\\\\\\\boxed{\boxed{\bold{Answer: \underline{117}}}}\huge\checkmark[/tex]Good luck on your assignment and enjoy your day!~[tex]\frak{LoveYourselfFirst:)}[/tex]

Can someone help me pleas

Answers

x+2(x+8)
= x+2x+16
= 3x +16
answer: 3x + 16 (color it orange lol)

Is the following statement true or false?
The triangle proportionality theorem only applies to right triangles.

A.) False
B.) True

Answers

Answer:

A.) False

Step-by-step explanation:

The triangle proportionality theorem can apply to all triangles, because if a line parallel to one side of a triangle intersects the other two sides of the triangle, then the line divides these two sides proportionally. This situation does not just apply to right triangles.

Answer:

I think it's actually True

Step-by-step explanation:

please help meeeeeeee!!!!!

Answers

Step-by-step explanation:

Answer:

5,15

Step-by-step explanation:

For mixed fractions, mutiply the bottom and add the top Ex: 1x4=4 and 4+1=5 hence 1 1/4 being 5/4 and the second you just mulitply. 3X5=15 4X5=20 or 15/20.

PLZ ANSWER
What patterns do you see in the pairs of numbers? Which is the greater number in each pair? Explain how you know.
a) 2 3 or 3 2
b) 2 5 or 5 2
c) 3 4 or 4 3
d) 5 4 or 4 5

Answers

The second number is reverse of the first number in each pair

32
52
43
45

I know this because if I do 23 minus 32 I get a negative number, however if I do 32 minus 23 I get a positive number meaning 32 is bigger

How fast is 5,280 feet= 1 mile
in feet per second

Answers

Answer:

10.560

Step-by-step explanation:

you can just use the calculator!

Answer:

62.5 i think... sorry if im wrong

Step-by-step explanation:

i hope this helps :3

Sheldon gets paid $4 per hour to babysit his cousin. This
weekend, he babysat on both Saturday and Sunday. He
made a total of $56. Sheldon babysat for 8 hours on
Sunday. For how many hours did he babysit on Saturday?
Let x = hours spent babysitting on Saturday. Choose the equation and
solution steps that correctly represent this problem.

Answers

Answer:

Step-by-step explanation:

4 times 8 = 32. 56 - 32 = 24. 24 divided by 4 = 6.

Anyone know ????? thank you

Answers

Answer:

2/3

Step-by-step explanation:

Taylor walks 7 miles in 2 hours. At what unite rate dose Taylor walk

Answers

Answer:

Step-by-step explanation:

Unit rate means that the denominator of the units has to be 1: units have to be miles/1 hour

Thus divide miles by hours to get the unit rate. The answer would then be 7/2 miles/1 hour

Find the perimeter and area

Answers

Answer:

perimeter = 14

area = 6

Step-by-step explanation:

p = 4 + 3 + 7

a = L × w

Answer:

Perimeter: 14m²n²cm

Area: 28m²n²

Explanation step bye step Given Data:

height: 4m²

length: 7mn²

base: 3mn²

To Find:

Perimeter =?

Area=?

Formula:

Perimeter: a + b + c

Area: length × height

Solution

Perimeter: a+b+c

= 4m²+7mn²+3mn²

= 14m²n² cm

Area: l×h

= 4m²×7mn²

= 28m²n²

please mark as brainliest answer pls

Kiran read for x minutes,and Andre read for 5\8 more than that write an equation that relates the number of minutes Kiran read with y,then number of minutes that Andre read.

Answers

Answer:

[tex]y = \frac{5}{8} + x[/tex]

Step-by-step explanation:

Given

[tex]Kiran = x[/tex]

[tex]Andre = y[/tex]

[tex]Andre = \frac{5}{8}\ minutes\ more[/tex]

Required

Write an equation that represents the scenario

[tex]Andre = \frac{5}{8}\ minutes\ more[/tex] means that Andre read 5/8 minutes more than Kiran and this can be represented as:

[tex]Andre = \frac{5}{8} + Kiran[/tex]

Substitute x for Kiran

[tex]Andre = \frac{5}{8} + x[/tex]

Substitute y for Andre

[tex]y = \frac{5}{8} + x[/tex]

Can someone help me with this geometry question.

Answers

The answer I think is d but let me know

Examine the following diagram: 2 lines intersect to form 4 angles. From the top, clockwise, the angles are 1, 4, 2, 3. Which statement is not true of the given diagram? m∠2 + m∠3 = 180° m∠2 + m∠4 = 180° ∠3 and ∠4 are vertical angles ∠2 ≅ ∠4

Answers

Answer:

The answer is D on edg 2020

Step-by-step explanation:

brainliest plz

Answer:

Its D

Step-by-step explanation:

∠2 ≅ ∠4

Please help! 20 points and Brain liest if answered correctly

Answers

Answer:

-5,4

Step-by-step explanation:

Answer:

y=3/4x-5

Step-by-step explanation:

look at the image I attached

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