Answers
Answer:
Step-by-step explanation:
We can use the quadratic formula or factor, This looks hard to factor so we should use the quadratic formula.
ax^2 + bx + c
so
a=4
b=-9
c=2
you can try it by hand or use this:
https://www.calculatorsoup.com/calculators/algebra/quadratic-formula-calculator.php
you get x=2 and x=0.25 these are the x intercepts (where Y is zero and where the graph crosses the x axis)
so mark x=2 and x=0.25 with a dot on a number line and you can draw a straight line between them since that is the part of the graph that is below the x axis (because the equation has <0) it is a positive parabola because the "a" value is positive and the presence of a "b" value means part of the graph will be below the x axis
Related Questions
A National Institute of Health survey of 40467 U.S adults found that 3156 of them experienced at least one major depressive episode in the previous year. Make a 95% confidence interval for the proportion of all U.S. adults who experienced depression in that year. (Source: https://www.nimh.nih.gov/health/statistics/major-depression)
Answers
Using the information given, it is found that the 95% confidence interval for the proportion of all U.S. adults who experienced depression in that year is (0.075, 0.081).
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the z-score that has a p-value of [tex]\frac{1+\alpha}{2}[/tex].
3156 out of 40467 adults experienced depression, hence:
[tex]n = 40467, \pi = \frac{3156}{40467} = 0.078[/tex]
95% confidence level
So [tex]\alpha = 0.95[/tex], z is the value of Z that has a p-value of [tex]\frac{1+0.95}{2} = 0.975[/tex], so [tex]z = 1.96[/tex].
The lower limit of this interval is:
[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.078 - 1.96\sqrt{\frac{0.078(0.922)}{40467}} = 0.075[/tex]
The upper limit of this interval is:
[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.078 + 1.96\sqrt{\frac{0.078(0.922)}{40467}} = 0.081[/tex]
The 95% confidence interval for the proportion of all U.S. adults who experienced depression in that year is (0.075, 0.081).
A similar problem is given at https://brainly.com/question/16807970
3. What's the relationship between VO2max and cardiorespiratory exercise?
I
Answers
Answer:
A person's VO2max measurement is generally considered the best indicator of cardiovascular fitness and aerobic endurance. [ -is the relationship between VO2max and cardiorespiratory exercise. ]
Step-by-step explanation:
this is shoRT but helps
the tjmaxx is selling a coat for $126. if the price on the receipt was $ 134.82, what is the sales tax
Answers
Answer:
The tax is 7% ^^
Step-by-step explanation:
Answer:
Sale tax is 7% or $8.82
Step-by-step explanation:
126 + 8.82 = 134.82 sales tax 7%
The distance between two cities is 420km. What is the average speed of a journey from one city to the other if it takes 6 hours and 15 minutes?
BRAINLIEST
Answers
Answer:
1.024km/h
Step-by-step explanation:
speed=distance/time
speed=420/6 hours 15 minutes
speed=420/410
speed=1.024km/h
a train travelled 3/5 of a journey in 6 hours. then it travelled the remaining 300 miles in 4 hours. what was the average speed for the whole journey
Answers
first, you must find out how many miles were traveled in total by finding how many miles 3/5 of the journey is. we know 2/5 is 300 since the rest of the journey took that long so we can find 1/5 by taking half of that (150) and then multiplying it by 3 to get 450. 450 + 300 is 750 which is then the total amount. to find the miles traveled per hour you then want to divide the miles traveled by the number of hours, which is 10 (6+4). so you do 750 divided by 10 which gets you your final answer 75.
Put the following equation of a line into slope-intercept form, simplifying all fractions.
6x+2y=-8
Answers
Answer:
y = 3x - 5
Step-by-step explanation
Answer:
Y = 3x - 5
Step-by-step explanation:
6x - 2y = 10
-2y = -6x + 10
y = 3x - 5
pls help me and pls no link dont try me
Answers
Answer:
red line
the red line has a slope of -1 by looking at the coordinates,
it also intersects the given point (1,-1)
Please Help!! Asap!!
A local club team is holding tryouts for six spots on the soccer team. Since there is not much time before a very important tournament they need to select the best players. Which method would be the best to ensure they select the "most talented" soccer players?
A. They watch the players during tryouts and then put them on a list in order from the most skilled to the least skilled and then select the top six from the list.
B. The first day of tryouts they select the first six that show up as they figure those are the most eager for a spot.
C. They place all of the names of the people trying out in a hat and then select six out of the hat. Those are the ones that are chosen.
D. They watch the players during tryouts and then put them on a list in order from the most skilled to the least skilled and then select the top three and the bottom three from the list.
Answers
Answer:
A because it's most likely to be like that at tryouts
you have 1200 feet of fencing enclose a rectangular region and subdivide it into three smaller rectangular regions by placing two fences parallel to one of the sides. Express the area of the enclosed rectangular region, as a function of the length the fence that divides the rectangular region, x
Answers
Answer:
400
Step-by-step explanation:
To solve for k in the inequality -16 -32 > -48, what steps are correct?:
A First, subtract 32 to each side, then divide by -16 and flip the sign
B First, divide both sides by 16, then add 32 to both sides and leave
the sign
C First, subtract 48 from both sides, divide by -16 and leave the sign
D First, add 32 to both sides, then divide by -16 and flip the sign
Answers
Answer:
D. First, add 32 to both sides, then divide by -16 and flip the sign
Step-by-step explanation:
Taking that the inequality is -16k-32>-48
First you have to get rid of any addition or subtraction, in this case you have to get rid of -32 by adding 32 to each side:
-16k-32+32 > -48 +32
Then you need to divide by -16 and flip the sign because you are dividing by a negative number and if you don't flip the sign the inequality will be false.
[tex]\frac{-16k}{-16} <\frac{-16}{-16}[/tex]
REASONING You can paint 75 square feet of a surface every 45 minutes. Determine how long
it takes you to paint a wall with the given dimensions.
9 ft x 9 ft
It will take you___
minutes to paint the wall.
Answers
Answer:
I think that it will take about 81 minutes to paint the wall
Step-by-step explanation:
Answer:
75 ft square=45 min
81 ft square=48.6 min
81*45/75
Step-by-step explanation:
good luck
CAN SOMEONE PLEASE ANSWER MY QUESTION IF IS WORTH 100 points!!!! I HAVE BEEN TRYING TO GET AN ANSWER SINCE 1:00! AND I HAVE SPENT OVER 1000 POINTS!!!!!!! JUST PLEASE TAKE TIME TO ANSWER!!!! DON"T PUT A LINK PLEASE OR DELETE
GIVEN THAT TAN Ꝋ= - 4/3 AND Ꝋ IS IN QUADRANT II, FIND SIN 2Ꝋ
Answers
Answer:
sin 2θ = -24/25
Step-by-step explanation:
see the below formula of sin x in terms of tan x
by substituting => -4/3 / ± √(16/9 + 1)
=> -4/3 / ± √(25/9)
=> -4/3 / ± 5/3
=> ± -4/5
=> ± 4/5
as theta is in second quadrant is in 2nd quadrant sin value is positive
so sin θ = 4/5 and cos θ = -3/5
now sin 2θ = 2 sinθcosθ
= 2 * 4/5 * -3/5
= -24/25
if johnny had 3 apples and gave Susan 2 how much apples would he have
Answers
Answer:
an apple would remain
Step-by-step explanation:
What is the product?
(x − 3)(2x2 − 5x + 1)
2x3 − x2 + 16x + 3
2x3 − 11x2 + 16x + 3
2x3 − 11x2 + 16x − 3
2x3 − x2 + 16x − 3
Answers
Step-by-step explanation:
= (x - 3)(2x² - 5x + 1)
= 2x³ - 5x² + x - 6x² + 15x - 3
= 2x³ + (-5 - 6)x² + (1 + 15)x - 3
= 2x³ - 11x² + 16x - 3
Option → C
The product of the given polynomials is: C. 2x³ - 11x² + 16x - 3.
What is the Product of Two Polynomials?The product of two polynomials is simply the multiplication of both polynomials together.
Given:
(x − 3)(2x² − 5x + 1)
Multiply using the distributive property
x(2x² − 5x + 1) -3(2x² − 5x + 1)
2x³ - 5x² + x - 6x² + 15x - 3
Combine like terms
2x³ - 11x² + 16x - 3
Therefore, the product of the given polynomials is: C. 2x³ - 11x² + 16x - 3.
Learn more about polynomials on:
https://brainly.com/question/2833285
I will give BRAINLIEST. Could someone give an answer along with a brief explanation pls.
Answers
Answer:
y=[tex]\frac{3}{4}[/tex]x-2
Step-by-step explanation:
Since it will be parallel that means m=[tex]\frac{3}{4}[/tex]
then you can use point slope form (y-y1)=m(x-x1): y+5=[tex]\frac{3}{4}[/tex](x+4)
then you can distribute the [tex]\frac{3}{4}[/tex]: y+5=[tex]\frac{3}{4}[/tex]x+3
then subtract 5: y=[tex]\frac{3}{4}[/tex]x-2
The price of a notebook was 3.70 yesterday. Today, the price fell to 3.20. Find the percentage decrease. Round your answer to the nearest tenth of a percent.
Answers
Answer:
The price was dropped around 15%
Step-by-step explanation:
You will pay $3.15 for a item with original price of $3.70 when discounted 15%. In this example, if you buy an item at $3.70 with 15% discount, you will pay 3.70 - 0.555 = 3.15 dollars.
15 men can complete the construction of a wall in 12 days in how many days can 18 men complete the same work
Answers
Answer:
10 days
Step-by-step explanation:
15 men ----- 12 days
18 men ----- x ?
They are inversely proportional
more men less days
15 / 18 * 12 = 10 days
A train goes at a constant speed. It can travel 150 miles in 2 1/2 hours. How long would it take for that train to travel 100 miles?
Answers
Answer: 1 hour and 50 min
Step-by-step explanation:
Answer:
Step-by-step explanation:
Can someone tell me what happens in 2 hours
Please help 30 points and don’t comment stuff for the points please
Answers
Answer:
x = 78
y = 115
Step-by-step explanation:
Answer:
X= 78°
Y=115°
Step-by-step explanation:
180° - 102°
115 = 115°
Is (1,1), (2,2), (3,3), (4,4), (5,8) a function? Why or why not?
Answers
Gladys classifies the following system of equations.
y = 6x + 2
y = 6x + 1
Select Correct or Not correct for each statement.
Statement
Correct
Not correct
o
O
The system is inconsistent because the slopes are the same and the lines are different.
The system is dependent because the y-intercepts are different.
O
O
Answers
The system is inconsistent because the slopes are the same and the lines are different.
A linear equation is of the form:
y = mx + b
where y, x are variables, m is the slope of the line and b is the y intercept.
Given the following system of equations:
y = 6x + 2 (1)
y = 6x + 1 (2)
We can see that both equations have the same slope of 6 but have different y intercepts.
Hence the system is inconsistent because the slopes are the same and the lines are different.
Find out more at: https://brainly.com/question/13911928
HERE YOU GO (THESE ARE THE RESULTS I GOT FROM THE GUY ABOVE ME):
What is the value of K?
Answers
Answer:
The one guy is right k equals 43.6
Hope This Helps!!!
The value of k using Vertical angles is 43.6 degree.
Vertical angles are a pair of non-adjacent angles that are formed by the intersection of two lines. When two lines intersect, they create four angles at the intersection point.
Vertical angles are the angles that are opposite to each other and share the same vertex but are not adjacent. They are Congruent.
As, k and 43.6 are Vertical angles.
So, k = 43.6
Learn more about Vertical Angles here:
https://brainly.com/question/24566704
#SPJ6
2. French Vanitta K-Cups that originally
cost $5.99 are now on sale for $4.75.
Answers
Answer:
20.7% is the % decrease.
Step-by-step explanation:
If you are finding the % of decrease then see below.
% Decrease = (Original Cost - New Cost ) ÷ Original Cost × 100
5.99 - 4.75 = 1.24
1.24 ÷ 5.99 = .2070
.2070 × 100 = 20.7%
A car traveled 35 miles per hour. In how many hours did it travel 280 miles?
Answers
Answer:
8
Step-by-step explanation:
280/35=8
Answer:
8 hours.
Step-by-step explanation:
280/35 = 8
Here at Dillard 6-12 the amount of new teacher went from 24 teachers to 30 teachers. What is the percent of change?
Answers
Answer:
25% increase
Step-by-step explanation:
formula for percent of change = (new amount - original amount) / original amount; this will give you a decimal and multiply it by 100 to get the percent
(30 - 24) / 24
6/24 = 1/4 = 0.25
25% increase
Sarah practices the piano 1/3 hour in the morning, 5/6 hour in the afternoon, and 4/5 hour in the evening.
Answers
Answer:
Sarah practices the Piano for 1.96666 Hours or 59/30 Hours
Step-by-step explanation:
0.33333 + 0.83333 = 1.16666
1.16666 + 0.8 = 1.96666
1.96666 = 59/30
The cost of a baguette and a cup of hot chocolate is $1.45. The cost of 2 baguettes and a cup of hot chocolate is $2.10. What is the cost of one cup of hot chocolate?
Answers
Answer:
It is $0.8
Step-by-step explanation:
First find out the value of one baguette.
They just added one more baguette. So the amount left after subtracting them both will be the cost of 1 baguette.
2.10 - 1.45 = 0.65
Now, subtract the 1st cost with the cost of 1 baguette.
1.45 - 0.65 = $0.8
Pls Mark Me as the brainliest.
Please solve.
Picture below
Answers
Answer:
1) -2x-11
2) 1.3x-3
3) 5k-20
4) 21.84
Step-by-step explanation:
-2x-7+(-4) -2x-7-4 -2x-11
5.2x+9-12-3.9x 1.3x+9-12 1.3x-3
5(k-4) distribute 5k-20
5.46÷0.25=21.84
In a factory, eggs are packaged in groups of 12 per box.How many full boxes of eggs can the factory make with 2321 eggs?
Answers
So 193 full boxes of eggs
4x + 5y = 6
5x + 4y = 5
The lines are
A. perpendicular.
B. parallel
C. neither
Answers
[tex]{\huge{\boxed{\mathfrak{Question}}}[/tex]
[tex]4x + 5y = 6\\5x + 4y = 5[/tex]
The lines are
A. perpendicular.
B. parallel
C. neither
__________________________
C. Would be our answer because parallel lines never intersect
perpendicular lines form 90 degrees of all sides.
