A student performed the following steps to find the solution to the equation
x2 + 4x-12-0. Where did the student go wrong?

Answers

Answer 1

Answer:

Step 2

Step-by-step explanation:

Step 2 because in step 1, they correctly wrote the factors of the polynomial as (x+6) and (x-2). But then in step 2, (x+6) suddenly became (x-6) and (x-2) became (x+2), which is incorrect.

The answers in step 3 should have been -6 and  2.


Related Questions


In a certain Algebra 2 class of 30 students, 14 of them play basketball and 10 of them play baseball. There are 14 students who play neither sport. What is the probability that a student chosen randomly from the class plays both basketball and baseball?

Help a man out

Answers

Basketball =A Baseball =B
n(AUB)= 30-14=16
n(A and B ) = 14+10-16 =8
P(A and B)= 8/30

Please somebody help me out!!

Answers

Answer:

See below.

Step-by-step explanation:

These work just like ordinary algebraic expresssions, except you have to remember always:  i^2 = -1    i squared is negative one!

(4 - 3i)(4 + 3i)   "FOIL" the expression to get 16 - 3i + 3i - 9i^2.  But i^2 = -1, so this is the same as 16 - 3i + 3i + 9.  Combine like terms.

Ans. 25

(4 - 3i)(i)  Distribute the i to the two terms of the binomial.

4i - 3i^2 = 4i - 3(-1)

Ans. 4i + 3

(6i)(4 + 3i) = (6i)(4) + (6i)(3i) = 24i + 18i^2 = 24i + 18(-1)

Ans. 24i -18

(6i)(i) = 6i^2 = 6(-1)

Ans. -6

(-5)(4 + 3i) = -20 - 15i   That's it; there's no i^2 to deal with.

Ans. -20 - 15i

(-5)(i)   = -5i  Again, that's all there is to it.

Ans. -5i

Which of the following equations will have a negative solution?​

Answers

Answer:

The third equation, [tex]7\frac{1}{2} +m = 4\frac{2}{3}[/tex].

Step-by-step explanation:

In this question, we have to solve the equation for each of the options and after doing so we will see that the only option that will have m equal a positive number is the third option. Here is how we solve that equation:

[tex]7\frac{1}{2} +m = 4\frac{2}{3} \\m = 4\frac{2}{3} - 7\frac{1}{2}\\m = -2\frac{5}{6}[/tex]  

3. Shyann is flipping a quarter and flips 8 tails in a row. Should the next flip most likely be a
heads to balance it out? Explain your reasoning.

Answers

There is an equal 50% chance of heads or tails regardless of a which happened to occur the most consistently.

SOLVE THE SYSTEM USING SUBSTITUTION

HURRY ILL GIVE BRAINLIEST!!!!

Answers

5)Substituting any of the following equations; i chose bottom into top:
-2x+5=x+2
=>-3x=-3
=>x=1
Sub the x in any of the eqs to find y so
Y=1+2
=>Y=3
ANS: (1,3)

6) substituting the top equation into the bottom one:
3x+2x+4=9
=>5x=13
=>x=13/5 or 2.6
Sub the x in any of the eqs to find the y so
Y=5.2+4
=>y=9.2
ANS: (2.6, 9.2)

Which of the following relation is a function.

Answers

Answer:

Which of the following relations is a function- A

Determine which relation is a function- A

Step-by-step explanation:

A function is a type of relationship where x's do not repeat. So, to solve find where each y has a unique x value. In the first question, A is correct because the x values; -3, 0, 2; never repeat. Then, on the next question A is correct because it is a relation written in slope-intercept form, which is a type of function notation.

transformati in unitati principale de masura pentru:
lungime

Answers

Lololololololokolololilo

This is part two of the problem go check part one so it makes sense

Answers

Answer:Execute Order 66

Step-by-step explanation:

Answer:

Step-by-step explanation:

Assuming that the original figure is the black one

Area of the original figure = 2 x 3 = 6

A (0,1) -> A’ (0,3)

B (2,1) -> B’ (6,3)

C (2,4) -> C’ (6, 12)

D (0,4) -> D’ (0,12)

AB = 6

BC = 9

Area of the final figure = 9 x 6 = 54

b)

area of the final figure = 9 x area of the original figure

c)

true, because their side are proportional

plz help with question 12 ASAP

Answers

Answer:

V = 577 cubic cm

Step-by-step explanation:

V(cyl) = Area of Base x Height

Area of Base = πr²

r = 7/2 or 3.5

h = 15

V = π(3.5)²(15)

V = 577

There are 14 horses and 56 camels at the stable. What fraction of animals in the stable are horses?

Answers

Answer:

1/4

Step-by-step explanation:

if you do it on a calculator it comes out to 0.25 which equals 1/4

Step-by-step explanation: Since there are 14 horses, 14 - 6 -5 = 3 are black.

a) 3 out of 14 are black, so probability is 3/14 chosen horse will be black

b) 1 - 3/14 = 11/14 probability will not be black

c) 6 are brown and 3 are black, so 9/14 probability chosen horse will be either.

What is the volume of this cube​

Answers

Answer:

1

Step-by-step explanation:

Multiply all(3) given lengths to get your volume.

Answer: 1 ft3 I think is the answer

 

Step-by-step explanation: :)

Find the surface area of the sphere. Round your answer to the nearest hundredth.

Answers

A≈1052.09

Hope you have a great life

The fish population is decreasing at a rate of 3% per year. In 2002 there were about 1600 fish. Find the fish population in 2010. Round to the nearest whole number

Answers

Answer:

Population of fish in

-11 2/3 x (-4 1/5) =

Answers

Answer:

49 is your answer :)

Step-by-step explanation:

Have a nice dayyy <3

The stadium vending company finds that sales of hot dogs average 35,000 hot dogs per game when the hot dogs sell for $2.50 each. For each 25 cent increase in the price, the sales per game drop by 2000 hot dogs. Determine a function R x that models the total revenue per game, where x is the number of $0.25 increases in the price of a hot dog.

Answers

Answer:

A function R x that models the total revenue per game is as follows:

Rx = 87,5000 + 3,750x – 500x^2.

Step-by-step explanation:

Based on the information in the question, we have:

Rx = Total revenue per game

x = Number of $0.25 increases in the price of a hot dog

Average sales of hot dogs = 35,000

Effect of each 25 cent increase in the price on average sales = 35,000 - 2000x

Effect of each 25 cent increase in the price on selling price = 2.5 + 0.25x

Therefore, we have:

Rx = (35,000 - 2000x)(2.5 + 0.25x)

This can be solved further by opening the brackets as follows:

Rx = 87,5000 + 8,750x - 5,000x - 500x^2

Rx = 87,5000 + 3,750x – 500x^2

Therefore, a function R x that models the total revenue per game is Rx = 87,5000 + 3,750x – 500x^2.

Complete steps to find x
+( 7×+24)=128

Answers

Answer:

8x=104

Step-by-step explanation:

The answer above is the question simplified down

X = 13 you welcome :)

There are 5 dogs and 20 cats. What fraction of pets are dogs?

Answers

Answer:

1/4

Step-by-step explanation:

5/20= 1/4

Answer:

1/5th of them are dogs

Step-by-step explanation:

5+20= 25

5/25 can be reduced to 1/5

A square pyramid is rotated about a line perpendicular to the base and through the vertex. What angle of rotation maps the pyramid onto itself?

30º
45º
60º
90º

Answers

Answer:

I think the answer is 30°. Please tell me if I'm wrong.

Answer: 90 Degrees

Step-by-step explanation:

Describe and correct the error made in factoring the expression below.

Answers

either im blind, or i see no expression

What is the area of the given trapezoid?
9)
2.9 km
5.6 km
10.9 km
O 38.64 km2
O 19.3 km2
O 77.28 km?
O 46.44 km2
PLEASE HELP

Answers

Answer:

38.64 km^2

Step-by-step explanation:

The formula for the area of a trapezoid is:

[tex]\frac{(b_{1}+b_{2})*h}{2}[/tex]

Where b1 and b2 are the bases and h is the height. We are given 2.9 and 10.9 as the bases and 5.6 as the height. We can plug these values into the formula:

[tex]\frac{(2.9+10.9)*5.6}{2}[/tex]

After entering the expression in the calculator, you get:

38.64 km^2

This is the first option.

Use the following number line to determine if the expressions are true or false.

Answers

true cus from point a and b is very low so true slime

Find the area of the parallelogram in square meters​

Answers

Answer: 27

Step-by-step explanation:

9*3

You want to measure the height of a tree in
front of your house. You are standing 25
feet away from the tree, and you are
looking at the top of the tree with an angle
of elevation of 52º. What is the height of
the tree? Round to the nearest foot.

Answers

Answer:

31 feets

Step-by-step explanation:

The sketched triangle of the problem is attached below :

To byian the height h of the tree :

We use the trigonometric relation :

Tan θ = opposite / Adjacent

Tan 52 = h / 25

1.2799416 = h / 25

h = 1.2799416 * 25

h = 31.998540

h = 32 feets

I upped the steaks plz answer this, I will give brainiest

Answers

Answer:

[tex] \displaystyle x = \frac{3}{4} [/tex]

Step-by-step explanation:

we are given that

[tex] \displaystyle P = \left(x, - \frac{ \sqrt{7} }{4} \right)[/tex]

we want to figure out x

remember that,

In unit circle x coordinate is considered cos and y coordinate is considered sin

so in order to figure out x we should figure out the value of cos to do we can consider Pythagoras trig indentity

given by

[tex] \displaystyle \sin ^{2} ( \theta) + { \cos}^{2} ( \theta) = 1[/tex]

we are given sin=-√7/4 thus

substitute:

[tex] \displaystyle \left( - \frac{ \sqrt{7} }{4} \right) ^{2} + { \cos}^{2} ( \theta) = 1[/tex]

simplify square:

[tex] \displaystyle \frac{7}{16} + \cos ^{2} ( \theta) = 1[/tex]

move left hand side expression to right hand side and change its sign:

[tex] \displaystyle \cos ^{2} ( \theta) = 1 - \frac{7}{16} [/tex]

simplify Substraction:

[tex] \displaystyle \cos ^{2} ( \theta) = \frac{9}{16} [/tex]

square root both sides:

[tex] \displaystyle \cos ^{} ( \theta) = \pm\frac{3}{4} [/tex]

since in unit circle cos is x and P belongs to Q:IV negative cos isn't applicable

hence,

[tex] \displaystyle x = \frac{3}{4}[/tex]

IS THIS IMAGE BELOW AND MY ANSWER CORRECT PLEASE HELP DUE IN 3 MIN

Answers

Answer:

yeah it's right

Step-by-step explanation:

Write as a money amount and as a decimal in terms of dollars 42\100

Answers

The answer is $0.42 or $42.00

Need help plz I’ll give you Brainly

Answers

the volume of the cone is 565.49

the volume of the hemisphere is 452.3893

add these together the volume is 1017.8793

or 1017.88 to the nearest hundredth

Ami needs to divide these base-ten blocks into 5 equal groups.
Describe a model that would show how many are in each group.
The model will contain
ten and
ones in each group.

Answers

Step-by-step explanation:

The model will contain 1 ten and 4 ones in each group.

I need help for this question

Answers

x = 56 + 106
162 = x

Because the radius is 56, and the line outside of SU is 106, so add the two values then you’ll have x

the simple interest on a sum of money is 25% of the rate percent per annum find the rate​

Answers

si =25%*p  

rate =term=t  

from si= ptr/100

term = rate = 5

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