Answer:
Step-by-step explanation:
Combine like terms in 2x^2-5x+1=x+4: 2x^2 -6x - 3 = 0
The coefficients of this quadratic are {2, -6, -3}. Apply the quadratic formula. Start by finding the discriminant, b^2 - 4ac:
b^2 - 4ac = (-6)^2 - 4(2)(-3) = 36 + 24 = 60
Because the discriminant (60) is positive, we know that this quadratic has two real, unequal roots:
-(-6) ± √60 6 ± (√4)(√15)
x = -------------------- = ----------------------
2(2) 4
or:
6 ± 2√15 3 ± √15
x = ----------------- = ----------------
4 2
I need help pls and sorry there is an answer marked it’s because by accident I press it but pls help me
Answer:
2
Step-by-step explanation:
because the outer line is one line and the triangle in other line
Answer:
3
Step-by-step explanation:
There is a line of symmetry from each vertex of the triangle through the square opposite it. I can't draw it out here but there's one going straight down the middle, another going from the triangles leftmost point through the right hand square and another from the triangles rightmost point through the left hand square.
Madison draws an isosceles triangle with side lengths of 10 inches, and the angle between them of 50°. Can you find the measures of the other angles based on this information? Explain your answer.
S.O.S !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
120
Step-by-step explanation:
add 50+10=60
then 180-60=120
Two years ago, the average number of customers in your all of your company's stores per week was 3173 customers. This figure had increased 6% over the previous two years. Assume that you are doing a current study to test the claim that the mean weekly number of customers is different than it was two years ago. Assume a population standard deviation of 1,550 customers. Suppose you look at a random sample of 73 stores and find an average weekly customer total of 3,391. You wish to test the claim stated above at the 0.10 level. Run the appropriate hypothesis test.
Required:
Write ONLY the conclusion to your hypothesis test.
Answer:
Accept the null hypothesis
Step-by-step explanation:
Two years ago, the average number of customers in your all of your company's stores per week was 3173 customers. Assume that you are doing a current study to test the claim that the mean weekly number of customers is different than it was two years ago.
The null hypothesis is:
[tex]H_{0} = 3173[/tex]
The alternate hypothesis is:
[tex]H_{A} \neq 3173[/tex]
The test statistic is:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
Due to our test, we have that [tex]\mu = 3173[/tex]
Assume a population standard deviation of 1,550 customers.
This means that [tex]\sigma = 1550[/tex]
Suppose you look at a random sample of 73 stores and find an average weekly customer total of 3,391.
This means that [tex]n = 73, X = 3391[/tex]
Test statistic:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{3391 - 3173}{\frac{1550}{\sqrt{73}}}[/tex]
[tex]z = 1.24[/tex]
p-value:
Since we are testing if the mean is different of a value, and the z-score is positive, the pvalue is 2 multiplied by 1 subtracted by the pvalue of z = 1.24.
z = 1.24 has a pvalue of 0.9251
2*(1 - 0.9251) = 2*0.0749 = 0.1498
0.1498 > 0.1, which means that we accept the null hypothesis, that is, that the mean weekly number of customers is equal to what it was two years ago at the 0.1 level of significance.
Complete the tables of values.
5)
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4
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Simplify by combining like terms (3x2-5x- 6x)+(5x2+4x+4)
Step-by-step explanation:
I hope this helps. ans:9x+4
after 3 new students joined, the class had 26 students. which equations can be used to find n, the number of students in class before the 3 new students joined?
Answer:
23 were there
Step-by-step explanation:
26 - 3 = 25
helped
A: 3n =26
B: n - 3 =26
C: n + 3 =26
D n/3 =26
Plot 7 + 3i in the complex plane.
Answer:
See attached image
Step-by-step explanation:
In the complex plane, the x-axis represents real numbers and the y-axis represents imaginary numbers.
2(x-5) -6=-18 please help asap
Answer:
x = -1
Step-by-step explanation:
2 (x - 5) -6 = - 18
2 (x - 5) = - 12
x - 5 = - 6
x = - 1
Answer:
x=-1
is what the answer is to X
someone please help on this homework question
Answer:
25%, 40 trees, 50%, 36 trees
Find the area of sector TOP in
O using the information given below.
r=9m, mTP=189
Answer:
I believe that the answer is 1701 m² sorry if don't get it right
Rewrite the equation by completing the square.
x2 + 7x + 12 = 0
Answer:
9x²+12=0
Step-by-step explanation:
What is the least common denominator of 11/14 and 11/15
Answer:
210
Step-by-step explanation:
210 is the least common multiple of 14 and 15
What is the angle of AHM?
Write an expression equivalent to 2/3 (x-6)
Answer:
2/3x-4
Step-by-step explanation:
2/3*x=2/3x
2/3*6=4
What is the area of 3/4 of a circle?
(With a radius of 2)
Answer: 12.57
Step-by-step explanation: I got u
need help fast thanks
Answer: AOS: x =3 Vertex at (3,2)
Step-by-step explanation:
Find the equation of the line with slope m=−12 that contains the point (2,−4).
Answer:
y=-12x+20
Step-by-step explanation:
-4=-12(2) +b
-4=24+b
(add 24 both sides)
20=b
slope: -12
y intercept: (0,20)
Answer:
y + 4 = -12(x - 2)
Step-by-step explanation:
Use the point-slope formula for the equation of a straight line:
y - k = m(x - h)
Here m = -12, h = 2 and k = -4, and so we have:
y + 4 = -12(x - 2)
there are 3 consecutive even integers. three times the smallest is twice the largest. what are the integers
100 poi's SOLVE FAST PLZ AND I WILL GIVE BRAINLEITS I PORMISE
Answer:
8,10,12
Step-by-step explanation:
Answer:
integer 1 = 8
integer 2 = x+2 = 8+2 = 10
integer 3 = x+4 = 8+4 = 12
Step-by-step explanation:
integer 1 = x , smallest
integer 2 = y , x+12
integer 3 = z , largest, x+4
three times the smallest is twice the largest.
3 (x) = 2 (x+4)
solve for x:
3x = 2x + 8
3x-2x = 8
x = 8
Replacing:
integer 1 = 8
integer 2 = x+2 = 8+2 = 10
integer 3 = x+4 = 8+4 = 12
I just need brainliest please
Answer:
alright if you give me brianliest on this, when you answer one of my questions ill give you brainliest. brailiest for a brianliest?
Step-by-step explanation:
Answer
Catfishing, In LOl rate 0-10 Im bored
Step-by-step explanation:
When simplifying radical expressions, what combination of factors are you looking for and why?
Am bad at math I don’t get this
Answer:
x=35 y=18
Step-by-step explanation:
We have two triangles. These triangles are Similar as stated in the statement. Since they are similar, there side length will be in proportion.
To find x and y we need to set up a proportion of the corresponding sides of the triangles.
Let find the corresponding sides of both triangle.
JK corresponds with NM
KL corresponds with ML
JL corresponds with NL
To find side x we can use this proportion
JK/KL=NM/ML
Plug in the lengths
[tex] \frac{40}{kl} = \frac{16}{14} [/tex]
Cross multiply
[tex]560 = 16kl[/tex]
Divide by 16
[tex]kl = 35[/tex]
so x=35
Now to find y use this proportion
JL/JK=LN/NM
[tex] \frac{45}{40} = \frac{y}{16} [/tex]
Cross multiply
[tex]720 = 40y[/tex]
[tex]y = 18[/tex]
Answer:
X = 35
Y = 18
Step-by-step explanation:
The triangles are similar meaning that they are scaled up and down differently. ( and in this case rotated) Notice the shape of the triangles. The side measuring 40 in the larger triangle correlates to the side measuring 16 in the smaller triangle. We can use this to find the scale difference between the two triangles. 40/16 = 2.5. The larger triangle is scaled up 2.5 times the smaller triangle. X correlates to the side measuring 14. Scale 14 up 2.5 times. 14* 2.5 = 35, so x= 35.
Y correlates to the side measuring 45. Scale 45 down 2.5 times. 45/2.5 = 18. Y = 18
Find the value of x.
(Do not include the degree symbol in your answer. Round to the nearest degree as needed)
Answer:
X = 49.4
Step-by-step explanation:
Tan x = 7/6
Tan x = 1.1667
X = 49.4 degrees
Shade the fraction circles to represent each mixed number.. 1 3/5 +2 2/5 equals
What does the point (12,4) represent in this situation?
Answer:
what is the situation?
Step-by-step explanation:
The function f(3) = 50.000(0.975)", where x represents the underwater
depth in meters, models the intensity of light below the water's surface in lumens per
square meter. What is the intensity of light 200 meters below the surface
9514 1404 393
Answer:
316 lumens/m²
Step-by-step explanation:
We assume your intensity function is ...
f(x) = 50,000(0.975^x) . . . . x meters below the surface
__
Use 200 for x and do the arithmetic.
f(200) = 50,000(0.975^200) ≈ 316 . . . . lumens/m²
39. Find the circumference of a circle with radius of 18 in. Leave your answer in terms of pi
324pi In.
54pi in
36pi in.
18pi in.
Answer:
36pi
Step-by-step explanation:
multiply the radius by 2 to get 36 but dont multiply by pi just put 16π
Answer:
36pi in
Step-by-step explanation:
I figured out what was wrong thanks to the comment up top.
they just want the diameter why didnt they say that :/
The student council starts the year with a balance of $-15 (they were in debt). It comes up with the idea to sell tickets to a student versus teacher mud fight. The student council fund is now growing by $15 a minute.
1. After 9 minutes of mud fight ticket sales, what was the balance?
2. How many minutes did it take before the student council was able to pay off their debt?
Answer:
sorry di ko din po knows
Step-by-step explanation:
sorry tagala
Answer:
1. Is 12
Step-by-step explanation:
start -15
tickets $15
min 9
remember you started -15 so the first 15 got you into positive so that one doesnt count wich means you now have to miltiply 15*8=120
plz is this correct
?
Answer:
It's 3 and 177.
Step-by-step explanation:
Let the angle be x°. Then its supplementary is 59x°.
We know,
x+ 59x=180
or, x = 3°
and another angle, 59x°= 177°
0.5 divided by 0.05 plz show work
Answer:
Step-by-step explanation:
Answer: 10
working below!
Rashawn kept a record of how many hours he spent listening to music for 6 days during school vacation and displayed his results in the table below.
On Sunday, Rashawn listened to music for 12 hours. Should he use the mean or median to describe the data for the entire week?
Which statement explains whether the mean or median is the better measure of center?
A. The mean is the better measure because Rashawn listened to music the median number of hours on only 2 days of the week.
B. The mean is the better measure for the entire week because their is no outlier.
C. The median is the better measure because the mean is affected by the outlier.
D. The median is the better measure because almost all of the data points are between 6 and 7.
Answer:
B. The mean is the better measure for the entire week because their is no outlier.
Answer: C The median is the better measure because the mean is affected by the outlier