Hi, can anyone please help with this? I'm having a very hard time with this specific problem plus math is my least strong subject and it would mean so much if someone could help. Thank you!!
Answers
Answer:
Step-by-step explanation:
For reference the quadratic equations looks like this
(-b±[tex]\sqrt{b^2-(4*a*c)}\\[/tex])/2a
Amy's mistake (and solution)
We can see that when amy mulitplied c she wrote 20 instead of -20 (in step 1). She can fix this by writing (4*1*-20) instead
Richard's mistake (and solution)
When richard messed up on step 5 when he wrote (6-2i)/2. You only would write the i if the negative was in the radical (but in this case it's outside). You would fix this by just getting rid of the i entirely (and keeping the 2)
I'm not really too sure how you would do three but I'll give it a shot anyways
our equation will look like this: x²+2x
which means our quadratic equation would look like this
[tex]\frac{-2+/-\sqrt{2^2-4*1*0}}{2}\\=\\\\\frac{-2+/-(2)}{2}\\\\\\= -1+/-(1)\\\\-1+1=0\\-1-1=-2[/tex]
When I write +/- I mean plus or minus giving us -2 and 0 as our solutions
Related Questions
Which value of x is a solution to this equation? 5 x 2 - 36 x + 36 = 0
Answers
10-36x+36=0(multiply 5x2)
10-36x=-36(subtract 36 from both sides)
-36x=-46(subtract 10 from both sides)
x is approximately 1.28(divide both sides by -36) or 23/18
exact answer is 1.27777778
Llam
Is this a right triangle?
Use the Pythagorean Theorem to find out!
20 cm
21 cm
29 cm
Yes
No
Answers
Answer:
Yes
Step-by-step explanation:
29×29=841
21×21=441
20×20=400
29^2-21^2=20^2
841-441=400
400=400
Yes it is a right angle triangle
Negative five times a number is less than the sum of negative six times the number and 12
Answers
Answer:
-5 x X < -6x + 12
Step-by-step explanation:
I THINK im not really used to this but yes this is my expression i would present.
If a dice is rolled 18 times, how many times is the number 2 expected to come up? *
A .2 times
B. 3 times
B. 6 times
D.9 times
Answers
Answer:
the answer is B. 3 times
that's what I think
Number of times 2 come, If a dice is rolled 18 times is 3 times. So, Option 'B' is the correct answer.
Probability based problem:Probability of a number = Number of outcome / Total number of outcomes
Probability of getting two = 1 / 6
Number of times 2 come, If a dice is rolled 18 times = 18[Probability of getting two]
Number of times 2 come, If a dice is rolled 18 times = 18[1/6]
Number of times 2 come, If a dice is rolled 18 times = 3 times
Find out more information about 'Probability'.
https://brainly.com/question/11234923?referrer=searchResults
How many years will it take for $4,000 to double at a simple interest rate of 5%? Show your work.
Answers
Answer: in explination
Step-by-step explanation:
annual interest = .05(4000) = 200
to double, you need another $4000
number of years = 4000/200 = 20
annual interest = .05(4000) = 200
to double, you need another $4000
number of years = 4000/200 = 20
it will take 20 years
to check if you are right you would...
Check:
simple interest on $4000 for 20 years at 5%
= .05(20)(4000) = 4000
the amount = what we had + new amount
= 4000 + 4000 = 8000 which is double what we started with
So the answer would be it took 20 years.
Gavin wants to buy a jacket that sells for $38.95. An advertisement says that next week that jacket will be on sale for $22.50. How much will Gavin save if he waits until next week to buy the jacket?
Answers
Answer: Gavin will save $16.45 if he waits until next week to buy the jacket.
Step-by-step explanation:
Given: Current Market price of jacket = $38.95
Sales price next week = $22.50
Amount he can save = (Current Market price of jacket)- (Sales price next week )
i.e. Amount he can save = $ (38.95-22.50)
i.e. Amount he can save = $ 16.45
Hence, Gavin will save $16.45 if he waits until next week to buy the jacket.
please help (if you can)
Answers
which is a function A. {(7, 3), (7, 15), (7, -11)} B. all of the options correct
Answers
HELP!!
If we changed the -3 to a 3 in the equation, what would happen to the graph?
Answers
Answer:
It would change the y-intercept, so if it turned into a 3, the slope would just go higher at the beginning.
Step-by-step explanation:
Hope it helps!
The graph of the new equation y = 2ˣ⁻⁴ + 3 will have the same shape as the original graph, but it will be shifted 4 units to the right and 3 units up.
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
The equation y = 2ˣ⁻⁴ - 3 is an exponential function that has been shifted 4 units to the right and 3 units down from the basic exponential function y = 2ˣ.
If we change the -3 to a 3, we get the new equation:
y = 2ˣ⁻⁴ + 3
This new equation represents the original exponential function shifted 4 units to the right and 3 units up.
Therefore, the graph of the new equation y = 2ˣ⁻⁴ + 3 will have the same shape as the original graph, but it will be shifted 4 units to the right and 3 units up.
To learn more on Graph click:
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#SPJ2
Need correct answer ASAP!!!!! Thank you if you help me!
Answers
Answer:
I believe the answer to this question is B!
Hope this helps!
sqrt8^2 + 3^2= sqrt17^2
hope this helps :D
X²-8x+16=(x-?)(x-?) Can u help me
Answers
Answer:
Step-by-step explanation:
(x-4)(x-4) or (x-4)^2
F(x)=3x-2 find f^-1(x) than find f^-1(13)
Answers
Answer:
see explanation
Step-by-step explanation:
let y = f(x) and rearrange making x the subject, that is
y = 3x - 2 ( add 2 to both sides )
y + 2 = 3x ( divide both sides by 3 )
[tex]\frac{y+2}{3}[/tex] = x
change y back into terms of x with x = [tex]f^{-1}[/tex] (x)
[tex]f^{-1}[/tex] (x) = [tex]\frac{x+2}{3}[/tex]
To evaluate [tex]f^{-1}[/tex] (13) substitute x = 13 into [tex]f^{-1}[/tex] (x) , that is
[tex]f^{-1}[/tex] (13) = [tex]\frac{13+2}{3}[/tex] = [tex]\frac{15}{3}[/tex] = 5
erold’s weekly pay rate is $865. He receives a 25% pay raise. How can Jerold calculate his new weekly pay rate? Select all that apply.
A divide $865 by 0.25
B divide $865 by 1.25
C multiply $865 by 0.25
D multiply $865 by 1.25
E Solve for x: x···8655 125···100
F Solve for x: 865···x5 25···100
Answers
Answer:
D
Step-by-step explanation:
865 increase 25% =
865 × (1 + 25%) = 865 × (1 + 0.25) = 1081.25
find the value of x
PLZ
Answers
Answer:
x=21
Step-by-step explanation:
wow this waz ez
NEED HELP ASAP
ILL MARK BRAINLIEST
Answers
value? Hint: Rationalize the denominator and
4/4 - sqr6x
Answers
Answer:
The Answer is A
Step-by-step explanation:
I'm 100% right.
After learning how to fly, Wendy reduced her daily commute time by
75
%
75%75, percent. Previously, her commute took
m
mm minutes.
Answers
Answer:
3/4m
Step-by-step explanation:
what s the vertex y=3x^2-18x +30
Answers
Answer:
(3,3)
Step-by-step explanation:
Rewrite in vertex form and use this form to find the vertex ( h , k ) .
Hm.........………
…
…
…
Answers
What is the equation for five times a number is 45?
Answers
Answer:
5 × Y = 45 y stands for "a number"
Step-by-step explanation:
not sure what your asking so ill solve it too
45/5=9
when the equation is multiplication you use division also vice versa for division
5×9=45
y=9
The function y=-2(x-2)^(2)+6 shows the daily profit (in hundreds of dollars) of a hot dog stand, where x is the price of a hot dog (in dollars). Find and interpret the zeros of this function.
Select two answers: one for the zeros and one for the interpretation.
The answers are:
Answers
Answer:
C. Zeros at x = 2 ± √3, and D. The zeros are the hot dog prices that give $0.00 profit (no profit).
need help ty I’ll give brainliest
Answers
Answer:
120
Step-by-step explanation:
all angles of a triangle add up to 180. 180-15-45= 120.
:D
brainliest pls
Given :
Measure of an angle = 15°
Measure of the second angle = 45°
Let the measure of the third angle be x.
We know that :
▪︎Sum of all angles of a triangle = 180°[angle sum property]
Which means :
[tex] =\tt 15 + 45 + x = 180[/tex]
[tex] =\tt 60 + x = 180[/tex]
[tex] =\tt x = 180 - 60[/tex]
[tex]\hookrightarrow\color{plum}\tt \: x = 120°[/tex]
Thus, the measure of the third angle = 120°
Since the sum of all these angles is equivalent to 180°[15+45+120=180] we can conclude that we have found out the correct measure of the third angle.
Therefore, the correct option is (C) 120
Which expression is equivalent to 12 x + 3 ( x − 2 )
Answers
Answer:
15x - 6
Step-by-step explanation:
To solve this, Given the expression 12 x + 3 ( x − 2 )
To simplify, expand
12 x + 3 * x −3 * 2
Knowing that
- * + = -
then the expression becomes
= 12 x + 3x - 6
= 15x - 6
The expression given is equivalent to 15x - 6
CAN SO ONE PLS HELP ME whats (2-3x4)9+22
Answers
Answer:
The answer is = 112
Step-by-step explanation:
3x4 = 12
12 - 2 = 10
10 x 9 = 90 .,. when there is a ) next to a number you multiply
90 + 22 = 112
PLS ANSWER ITA DUE IN A FEW MINUTES
Answers
Answer:
2 is 60%
3 is 45%
4 is 20%
5 is 55%
Step-by-step explanation:
Want an explanation, or no? Your choice :)
Maggie goes to two different stores to shop for t-shirts. Both stores are having a sale.
At Store A, t-shirts are regularly priced at $22 but are on sale for 25% off.
At Store B, t-shirts are regularly priced at $30 but are on sale for 45% off.
Which of the following is true about the sale price of a t-shirt at the two stores?
A. Store B has the better price because 45% is greater than 25%.
B. Store A has the better price because $22 is less than $30.
C. The sale price is the same for both stores.
D. The sale price cannot be determined.
Answers
Answer:
store B
Step-by-step explanation:
If tn=18√t, what value of n makes this equation true?
Answers
Answer:
1/18
Step-by-step explanation:
distributive property of 3(2x + 7)
Answers
Answer:
6x+21
Step-by-step explanation:
Answer:
36
Step-by-step explanation:
How do you add fractions and whole numbers together? For example 1/4+2
Answers
Answer:
2.25 or 2 1/4
Step-by-step explanation:
Easy. you add them like regular numbers. 1/4 + 2 = 0.25 + 2 =2.25 and/or 2 1/4
) Esteban tiene cerámicas
rectangulares que miden
10 cm por 15 cm y con ellas
quiere formar superficies
cuadradas.
¿Cuál es la longitud de los
lados del cuadrado más pe-
queño que Esteban puede
formar?
Answers
Answer:
sorry I cant speak spanish
Step-by-step explanation: