Mathematics High School

Tran is solving the quadratic equation 2x2 – 4x – 3 = 0 by completing the square. His first four steps are shown in the table.

A table listing the first few steps in deriving the quadratic formula
In which step did Tran first make an error?

Step 1
Step 2
Step 3
Step 4

Answers

Answer 1

Answer:

step 3 i think

Step-by-step explanation:

Answer 2

Answer:

step 3

Step-by-step explanation:

Related Questions


Choose the correct scale factor:




Pls help

Answers

Answer:

The image was dilated by a scale factor of 2. (x,y) -> (2x,2y)

Step-by-step explanation:

The scale factor is 2

-72.5 rational or irrational

Answers

Answer:

-72.5 is a rational number because it can be written as a fraction.

Kelly got a part time job and had to pay $150 worth of taxes, which was 10% of her monthly payment. How much money did she make before paying taxes?

Answers

Answer:

$1,500

Step-by-step explanation:

To find how much money she made before paying taxes, divide 150 by 0.1:

150/0.1

= 1500

So, Kelly made $1,500 before taxes

Answer:

$1,500

Step-by-step explanation:

Turn 10% into a decimal: To turn a percent into a decimal, you move the decimal twice to the left.

10%=.1

Divide: $150 divided by .1=1500

$1,500

Hope this helped!! :)

Stay safe and have a wonderful day/night!!!!!

Good luck!

Brainliest?!?!

you have 200 points to use for extra power boosters in your game. if you can use your points for 5 boosters, how many points does each power booster cost?

Answers

The answer is 40, if you can only do 5 that’s simply division to see what they are worth individually.

Which of the given pairs of expressions are equivalent? Select all that apply.

Answers

Answer:

sorry I don't know about this Question

can you put a picture of the pairs and answers

The expression (3x²+x+8) + (x?- 9) is equivalent to?

Answers

Answer: 3x^2+2x-1

Step-by-step explanation:

What is the value of (-7)

Answers

Answer:

i dont know maybe ha got you its

Step-by-step explanation:

i   know maybe go find on the internet not brainly though

[tex]343^{x-3}=49^{2x-2}[/tex]

Answers

DONT CLICK ON THAT LINK PLEASE! But the answer is x= -5

Which number line shows the solution to w - 2 ≤ 8? *
(don't delete my question)

Answers

Answer:

closed circle going left from 10

Step-by-step explanation:

B (*￣3￣)╭

Part E
What is y = -1.5x + 121 rewritten as a recursive formula, where n represents
the number of minutes spent watching television and a represents the number of
minutes spent exercising?
A. a. = 1.5; a, = 2-1 - 121
B. a. 1.5; a, = a -1 + 121
C. a.
121; a = -1
- 1.5
D. a = 121; a, = 2,- +1.5

Answers

El petróleo cumple una triple función en la sociedad: fuente de energía, materia prima y fuente de ingresos.

Jackie wants to buy a dress, the regular price of the dress is $36 but it is on sale for 20% off, what is the final price, show work.

Answers

Answer: The final price is $7.2

Step-by-step explanation: if you multiply 36 x 20 = 720 and if you divide 100 = 7.2

A triangle has a base length of 14cm. The perpendicular height is 9cm. Find the area of the triangle

Answers

the answer is 42
14 x 9 / 3

The area of a triangle with the given base and height is 63 cm².

Given that, a triangle has a base length of 14 cm and the perpendicular height is 9 cm.

What is the area of a triangle?

The area of a triangle is defined as the total space occupied by the three sides of a triangle in a 2-dimensional plane. The basic formula for the area of a triangle is equal to half the product of its base and height, i.e., A = 1/2 × b × h.

Here, b=14 cm and h= 9 cm

So, area = 1/2 × 14 × 9

= 63 cm²

Therefore, the area of a triangle with the given base and height is 63 cm².

To learn more about the area of a triangle visit:

brainly.com/question/27701864.

#SPJ5

The line l is tangent to the circle with equation x2 + y2 = 17 at the point P.
Determine the equation of line l.

Answers

The line is perpendicular to the line from origin to P (by tangent is perpendicular to radii)
Which slope is 1/4
So the
(slope of tangent) x (1/4) = -1

Slope of tangent = -4
Point slope form:
(y-1)/(x-4)=-4
y-1=-4x+16
y=-4x+17


Or you can construct the upper half of the circle in y=(17-x^2)^(1/2) and differentiate it to get the slope then use point slope form again

A cheetah can run 110.352 kilometers per hours. A antelope can run 96.12 kilometers per
hour. How much faster is the cheetah than the antelope?
A 14.25 kilometers per hour
B 14 kilometers per hour
C 206.472 kilometers per hour
D 14.232 kilometers per hour

Answers

110.352-96.12=14.2320000

Answer:

D. 14.232 Kilometers

Step-by-step explanation:

110.352-96.12 = 14.232

pls give brainliest

Kristine wants to do hardwood flooring for her room. A floor plan of the room (in feet) is shown how much hardwood flooring does she need.

Answers

Answer:

The answer is "[tex]116 \ ft^2[/tex] "

Step-by-step explanation:

Please find the complete question in the attachment file.

Calculating the sides of the room:

[tex]8\times 8=64\\\\12\times 2=24 \\\\2\times 6=12 \\\\4 \times 4=16\\\\[/tex]

adding the value of the side area:

[tex]\to 64+24+12+16=116[/tex]

what is the solution of
x/3+2=3

Answers

Answer:

x=3

Step-by-step explanation:

x/3+2=3 (subtract 2)

x/3=1 (multiply by 3)

x=3

The graph of the function f(x) =x^2 is shown on the grid below. Graph the function g(x) =(x-2)^2 -4 in the interactive graph.

Answers

Answer:

shift it down by 4 units

Step-by-step explanation:

by the placement of the -4 it can be determined that you would shift it according to the y axis

The formula a(x-h)^2 + k = y

h represents change in x, k represents change in y

-k means shift down

Which is an arithmetic sequence?

Question 3 options:

-5, 6, 10, 13


1, 2, 4, 8


1, 4, 9, 16


3, 10, 17, 24

Answers

Answer:

3, 10, 17, 24

Step-by-step explanation:

The others don't have a common pattern so it is the last one.

The common difference in the last one is 7.

So the last one is the correct answer.

Hope this helps =]


Andre and Elena are each saving money. Andre starts with $120 in his savings account and adds $5 per week. Elena starts with $50 in her
savings account and adds $15 each week

After 4 weeks how much will they have.
After how many weeks will they both have the same amount of money.

Answers

Answer:

140 for andre and elena will have 110 dollars

1. A rectangle has side lengths of 3x2 + 5x - 1 and -7x+1. Which of the following expressions represents the area of the rectangle?
a. 3x²-21
b. 3x² - 35x-1
c. -21x³ - 38x²- 2x - 1
d. -21x³ - 32x² + 12x - 1

please help​

Answers

21x³-42x²+12x-1

[area of rectangle =length ×breadth

=(3x2 + 5x - 1)(-7x+1)

=3x²(-7x+1)+5x(-7x+1)-1(-7x+1)

=-21x³+3x²-45x²+5x+7x-1

=-21x³-42x²+12x-1


1. y = 6 x+8
2. y = 23 x
3. y = -x+ 5
4. y = 3 4 x - 212
5. y = 1,5 x + 11

Answers

Answer:

Not sure what you're asking here

Step-by-step explanation:

The admission free at a small is $ 1.50 for children and $ 4.00 for adults on a certain day $ 5,050 is collected if 1,000 adults attended the fair write and slove a linear equation to find the number of children that attended.

Answers

Answer:

c=children

a=adult

total amount=1.5c+4a

5050=1.5c+4*1000

1.5c=1050

c=700 childrens

Step-by-step explanation:

-269°

List the sign of each trig function for the given angle.​

Answers

lie in 1st quadrant
Step-by-step explanation:
sin(48)= 0.743
cos(48)=0.669
tan(48)=1.11
cosec(48)=1.345
sec(48)=1.495
cot(48)=0.90

9-1 Similar Polygons
Are the polygons similar? If they are, write a similarity statement and give the scale factor.


A. No, the polygons are not similar.
B. Yes; POSN - KDAG; scale factor 5:4
C. Yes; PNSO - KGAD; scale factor 4:3
o
D. Yes; OSNP - DKGA; scale factor 3:5

Answers

Answer:

b

Step-by-step explanation: I have the answer key

y=23x+5 and

y=x+3

what is the solution

Answers

Answer:

I solved this like you would a system of equations - if that is not the answer you need LMK

Point form:

(- 1/11, 32/11)

Equation Form:

x = -1/11, y = 32/11

Step-by-step explanation:

What information can you get from a bar graph?

the mean
the frequency of each category
the number of data points
the range

Answers

Answer:

the frequency of each category

Step-by-step explanation:

the frequency of each category

The frequency of each category

what is the value?.

help.​

Answers

-7!!

I checked on my calculator, since it’ll be too hard to show the work here with my phone :)

Kian is twice as old
as Xhendric. The sum
of their ages is 36. How
old are they?
(pls answer with solution)

Answers

Answer:

12 and 24

Step-by-step explanation:

Klan is 24 and Xhendric is 12

McKenzie delivers coupons to her neighborhood. This week she has 553 coupons to deliver. If she wants to give 7 coupons to each neighbor, which equation can be used to find the number of neighbors, n, to whom McKenzie can give coupons?

Answers

Answer:

Number of neighbors to whom McKenzie can give coupons = 79

Step-by-step explanation:

Coupons to deliver this week = 553

Coupons delivered to each neighbor = 7

which equation can be used to find the number of neighbors, n, to whom McKenzie can give coupons?

Let

n = number of neighbors to whom McKenzie can give coupons

n = Coupons to deliver this week / Coupons delivered to each neighbor

= 553 / 7

= 79

n = 79 neighbors

Number of neighbors to whom McKenzie can give coupons = 79

I BEG U HELP MEEE PLEASEEE

Answers

Answer:

C

Step-by-step explanation:

ANSWER


The answer is c
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