Answer:
5 seconds
1220 ft
Step-by-step explanation:
Step 1: Know when the stone reaches the maximum height
We know the maximum or minimum height of a parabola is at the vertex so we need to find the vertex
Step 2: Calculate the vertex
The t coordinate of the vertex can be calculated with [tex]\frac{-b}{2a}[/tex]
b = 160
a = 16
[tex]t=\frac{-(160)}{2(-16)}\\t=\frac{-160}{-32}\\t=5[/tex]
Step 3: We know the t coordinate we can find the height at that time
[tex]h_{(t)} =-16(5)^{2} +160(5)+20\\h_{(t)}=16(25)+ (800)+20\\h_{(t)}=400+ 800+20\\h_{(t)}=1220[/tex]
Therefore the stone reaches its maximum height of 1220 ft in 5 secs
Answer:
The maximum height of 420 feet is reached after 5 seconds.
Step-by-step explanation:
Which of these pairs of functions are inverse functions?
Answer:
see below
Step-by-step explanation:
You can attack this several ways. One is to work through f(g(x)) in each case and see if the result is x.
Another is to use a graphing calculator to evaluate y=f(g(x)) to see if the result is the line y=x.
Yet another way to work this is to pick a convenient value for x and evaluate f(g(x)) or g(f(x)). Here, we'll show this last case.
A: f(1) = 2^0 +1 = 2; g(2) = log2(2-1) -1 = -1 . . . . g(f(1)) = -1, not 1 ⇒ not inverses
B: f(2) = 1/2(ln(1) -1) = -1/2; g(-1/2) = 2e^(0) = 2 . . . g(f(2)) = 2 ⇒ inverses
C: f(e) = 4ln(e^2)/e^2 = 8/e^2; g(8/e^2) = e^1 = e . . . g(f(e)) = e ⇒ inverses
D: f(10) = 10^0-10 = -9; g(-9) = log(1) -10 = -10 . . . g(f(10)) = -10, not 10
⇒ not inverses
_____
The second and third pairs of functions are inverses.
Jin tried to evaluate 5 + 2 x 9 step-by-step.
5+2 x 9
Step 1: =7 x 9
Step 2: =63
Find jin’s mistake
A: step 1
B: step 2
C: Jin did not make a mistake
Answer:
5 + 2 x 9
Step 1 = 7 x 9
Step 2 = 63
Step-by-step explanation:
= 5 + 2 x 9
= 5 + ( 2 x 9 )
= 5 + 18
= 23
Step 2 = 7 x 9
= 63
Step 3 = 63
C. jin did not make a mistake
Sorry i'm wrong :)
find the length of segment AB
Answer:
AB = 10.77 units
Step-by-step explanation:
If the extreme ends of a line segment are [tex](x_1,y_1)[/tex] and [tex](x_2, y_2)[/tex].
Then the length of the segment joining these extreme ends will be,
d = [tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
If the extreme ends of the line segment AB are A(-3, 1) and (7, 5).
Measure of AB = [tex]\sqrt{(7+3)^2+(5-1)^2}[/tex]
AB = [tex]\sqrt{100+16}[/tex]
AB = [tex]\sqrt{116}[/tex]
AB = 10.77 units
Therefore, length of the segment AB will be 10.77 units.
Solve for x 5x2-4x=6
Answer:
That would equal 36
Step-by-step explanation:
i added them up
NEED HELP ASAP!! Angles of Elevation and Despression! Need to find y! Round to the nearest tenth!!
Answer:
[tex] y = 178.3 ft [/tex]
Step-by-step explanation:
y is opposite to the reference angle, 27°.
350 ft is adjacent to the reference angle, therefore:
[tex] tan(27) = \frac{y}{350} [/tex]
Multiply both sides by 350
[tex] tan(27)*350 = \frac{y}{350}*350 [/tex]
[tex] tan(27)*350 = y [/tex]
[tex] 178.3 = y [/tex] (to nearest tenth)
[tex] y = 178.3 ft [/tex]
Simplify nine to the second power
Answer:
It would be 81
Step-by-step explanation:
[tex]9^{2}[/tex] is the same as 9 times 9. And 9 times 9 is 81.
Answer:
2⁹ = 512
Step-by-step explanation:
2⁹ = 2*2*2*2*2*2*2*2*2 = 512
Please help I dont understand
Answer:
X+Y=8W^2-7W+7
Step-by-step explanation:
HEY,... HERES YOUR ANSWER ! I HOPE I HELPED! BRAINLIEST WOULD BE APPRECIATED :)
THE QUESTION-->
X=7W^2+4W-6
Y=W^2-11W+13
X+Y=?
THE EXPLANATION-->
SO LETS JUST ADD BOTH EQUATIONS!
SO...
X+Y=7W^2+4W-6+W^2-11W+13
SIMPLIFY LIKE TERMS..
7W^2+W^2+4W-11W-6+13
SIMPLIFY EVEN FURTHER..
X+Y=8W^2-7W+7
THE ANSWER-->
X+Y=8W^2-7W+7
HOPE I HELPED
PLS MARK BRAINLIEST
DESPERATELY TRYING TO LEVEL UP
✌ -ZYLYNN JADE ARDENNE
JUST A RANDOM GIRL WANTING TO HELP PEOPLE!
PEACE!
We are trying to come up with a regression model that predicts university GPA. Is high school GPA a significant predictor for university GPA?
Answer:
No.
Step-by-step explanation:
High school GPA is not a significant predictor of University GPA.
The Grade Point Average obtained at the end of high school education has almost nothing (in my opinion, it has nothing to do with) to do with grades that the scholar will obtain in college. Many scholars find it difficult adjusting to the social and academic life demands of tertiary institution.
A good predictor for university Grade Point Average would be:
The CGPA (Cumulative Grade Point Average) obtained by the student(s) in each year/session/level/part in the university.
This will be a significant predictor for university GPA.
What is the slope of the line that passes through the points (-3, -3)(−3,−3) and (-9, 5) ?(−9,5)? Write your answer in simplest form.
Answer:
Slope= -4/3
Step-by-step explanation:
The points are (−3,−3) and (-9, 5)
Slope= gradient between the two points
Slope= (y2-y1)/(x2-x1)
Where y2= 5
Y1= -3
X2= -9
X1= -3
Slope= (y2-y1)/(x2-x1)
Slope= (5-(-3))/(-9-(-3))
Slope= (5+3)/(-9+3)
Slope= 8/-6
Slope= -4/3
The revenue, in dollars, of a company that produces video game systems can be modeled by the expression 5x2 + 2x – 80. The cost, in dollars, of producing the video game systems can be modeled by 5x2 – x + 100, where x is the number of video game systems sold. If profit is the difference between the revenue and the cost, what expression represents the profit?
Answer: 3x-180
Step-by-step explanation:
Given: Expression for Revenue = [tex]5x^2 + 2x - 80[/tex]
Expression for Cost = [tex]5x^2- x + 100[/tex]
If profit is the difference between the revenue and the cost then the expression for profit will be:
Profit = Revenue - cost
[tex]=5x^2 + 2x - 80-(5x^2- x + 100)\\\\=5x^2 + 2x - 80-5x^2+x-100\ \ [\text{Multiply ' - ' sign inside the bracket}]\\\\=2x+x-80-100\\\\=3x-180[/tex]
Hence, the expression represents the profit is 3x-180 .
Answer:
its 3x-180 and for the seond one its $2,820
Step-by-step explanation:
got it right on edge
Change $35,000 per year to dollars per hours
If 512+14=x then x=23 Question 10 options: True False
A painter rented a wallpaper steamer at 9 a.m. and returned it at 4 p.m. He paid a total of $28.84. What was the rental cost per hour?
Greetings,
I hope you and your family are staying safe and healthy!
Answer: $4.12 per hour
Step-by-step explanation:
So, 9am to 4pm is 7 hours
Why? Because you go from 10am, 11am, 12pm, 1pm, 2pm, 3pm, and 4pm.
So now all we have to do is to divide the amount he paid by the number of hours.
Like this:
[tex]\frac{28.84}{7} = 4.12[/tex]
Therefore,
The rental cost per hour is $4.12
-----------------------------------
I'm a trusted helper! If you find my answer to be helpful, please kindly give it 5 stars and press the heart. Thanks!
The common ratio in a geometric series is 0.50.50, point, 5 and the first term is 256.
Find the sum of the first 6 terms in the series.
Answer:
504
Step-by-step explanation:
I think the correct question is like:The common ratio in a geometric series is 0.50 ( point 5) and the first term is 256.
Find the sum of the first 6 terms in the series.
If it's right, then
Sₙ = (a₁ × (1 - rⁿ)) / (1 - r)
S₆ = (256 × ( 1 - 0.5⁶)) / (1 - 0.5)
= (256 × 0.984375) / 0.5
= 504
hope it will help :)
PRACTICE ANOTHER Calculate the standard deviation σ of X for the probability distribution. (Round your answer to two decimal places.) σ = (No Response) 1.00
Complete Question
The complete question is shown on the first uploaded image
Answer:
The standard deviation is [tex]\sigma = 1.17[/tex]
Step-by-step explanation:
From the question we are told that
The data is
x 1 2 3 4
P(X = x) 0.2 0.2 0.2 0.4
Generally the standard deviation is mathematically represented as
[tex]\sigma = \sqrt{ \sum x^2 P(x) - (\sum x P(x))^2 }[/tex]
Here [tex]x^2 = 1^2 \ \ 2^2 \ \ 3 ^2 \ \ 4^2[/tex]
=> [tex]x^2 = 1 \ \ 4 \ \ 9\ 16 \[/tex]
[tex]\sum x^2 * P(x) = (1 * 0.2) + (4 * 0.2 ) + (9 * 0.2 ) + (16 * 0.2 )[/tex]
[tex]\sum x^2 * P(x) = 9.4[/tex]
[tex]\sum x P(x) = (1 *0.2) + (2*0.2) + (3 * 0.2) + (4 * 0.2)[/tex]
[tex]\sum x P(x) = 2.8[/tex]
So
[tex]\sigma = \sqrt{ 9.2 - (2.8)^2 }[/tex]
[tex]\sigma = 1.17[/tex]
1/64, 1/16, 1/4, 1... What is the pattern and next term???
Answer:
[tex]\huge\boxed{\text{next term}=4}\\\boxed{f(n)=4^{n-4}}[/tex]
Step-by-step explanation:
[tex]\dfrac{1}{64},\ \dfrac{1}{16},\ \dfrac{1}{4},\ 1,\ ...[/tex]
It's the geometric sequence where
[tex]a_1=\dfrac{1}{64},\ q=4[/tex]
[tex]\dfrac{1}{16}=\dfrac{1}{64}\cdot4\\\\\dfrac{1}{4}=\dfrac{1}{16}\cdot4\\\\1=\dfrac{1}{4}\cdot4\\\\1\cdot4=4\to\text{next term}[/tex]
[tex]f(n)=\dfrac{1}{64}\cdot4^{n-1}=\dfrac{1}{4^3}\cdot4^{n-1}=\dfrac{4^{n-1}}{4^3}\\\\\text{use}\ \dfrac{a^n}{a^m}=a^{n-m}\\\\f(n)=4^{n-1-3}=4^{n-4}[/tex]
Find the interval in which f(x)=sinx−cosx is increasing or decreasing?
Answer:
There is no short answer.
Step-by-step explanation:
To find to intervals which f(x) increases or decreases, we first need to find it's derivative.
[tex]f(x) = sinx - cosx\\f'(x) = cosx - (-sinx) = cosx + sinx[/tex]
The function is increasing when it's value is > 0 and decreasing when it's value is < 0.
If we take a look at this graph, cosx+sinx is positive when they are both positive or when cosx is greater then sinx on the negative part.
I hope this answer helps.
what is the answer?
Answer/Step-by-step explanation:
Given:
Data set for sandwich calories=> 242, 290, 290, 280, 390, 350
Mean: the mean is given as sum of all values in the data set ÷ total no. of data set given
[tex] \frac{242 + 290 + 290 + 280 + 390 + 350}{6} = \frac{1,842}{6} = 307 [/tex]
Mean Absolute Value:
Step 1: find the absolute value of the difference between each value and the mean
|242 - 307| = 65
|290 - 307| = 17
|290 - 307| = 17
|280 - 307| = 27
|390 - 307| = 83
|350 - 307| = 43
Step 2: find the sum of all values gotten in step 1
65 + 17 + 17 + 27 + 83 + 43 = 252
Step 3: divide the result you get in step 2 by 6 to get the M.A.D
[tex] M.A.D = \frac{252}{6} = 42 [/tex]
The Mean Absolute Value represents or gives us an idea how spread the data set for the number of sandwich calories are.
Thus, averagely, the number of calories of sandwich at the restaurant are far from the mean caloric value by 42 calories.
witch number produces a rational number when multipled by 0.25
Answer:
1
Step-by-step explanation:
.25 is already a rational number as it equals 25/100 and 1/4 simplified
the total reimbursement (in dollars) for driving a company car m miles can be modeled by the function f(x) = 0.45m +5. After a policy change, five more dollars are added on and then the total reimbursement amount is multiplied by 1.25 describe how to transform the graph of f. what is the total reimbursement for a trip of 95 miles?
Answer:
The slope becomes 0.5625 and y intercept becomes 12.5.
$65.9375
Step-by-step explanation:
Given that
the total reimbursement function in terms of [tex]m[/tex] miles:
[tex]f(x) = 0.45m +5[/tex]
After the policy change, 5 more dollars are added and then total amount is multiplied by 1.25.
To find:
How to transform the graph of f.
Total reimbursement for a trip of 95 miles?
Solution:
[tex]f(x) = 0.45m +5[/tex] can also be written as:
[tex]y = 0.45m +5[/tex]
It is nothing but slope intercept form, comparing with [tex]Y = M X+ C[/tex]
M is the slope and C is the y intercept.
Slope of the graph is 0.45.
Y intercept is 5.
After change in the function, first of all add $5.
[tex]0.45m + 5+5 = 0.45m+10[/tex]
Now, multiply with 1.25
Resulting function becomes:
[tex]f(x) =1.25\times (0.45m+10)\\\Rightarrow f(x) =0.5625m+12.5[/tex]
Kindly refer to the attached image for the graph of the two functions.
Now, the slope becomes 0.5625 and y intercept becomes 12.5. This is the transformation.
To find the reimbursement for a trip of 95 miles:
Put m = 95
[tex]f(95) =0.5625\times 95+12.5 = \bold{\$65.9375 }[/tex]
solve for y:y= [-7-6]
answers:
(a)-13 (b)13 (c)1 (d) -1 (e) none of these
●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●
Hi my lil bunny!
❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙
[tex]y= [-7-6][/tex]
[tex]y = -13[/tex]
❧⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯☙
●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●
Have a great day/night!
❀*May*❀
Put these fractions in order of size, smallest to largest:
4/3, 3/4, 3/8, 5/8, 7/6
Answer:
3/8, 5/8, 3/4, 7/8, 4/3
Step-by-step explanation:
Identify the center and radius for the equation y2 = -8x – x2 – 24 – 6y.
Answer:
Hey there!
This circle would have a center at (-4, -3) and a radius of 1.
Let me know if this helps :)
Need help I don’t understand
Answer:
Complementary angles add up to 90 degrees, or a right angle.
In this case, it would be (c) AEF and FED, AEG and CEG
Step-by-step explanation:
The area of a rectangular piece of land J is 220 square metres.Its width is 12.5.what is the perimeter of the land ?
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{ {60.2 \: m}}}}}}[/tex]
Step-by-step explanation:
Given,
Area of rectangular piece of land ( l ) = 220 m²
Width ( w ) = 12.5 m
Finding length of the rectangular piece of land
[tex] \boxed{ \sf{area \: of \: rectangle = l \times w}}[/tex]
plug the values
⇒[tex] \sf{220 = l \times 12.5}[/tex]
Swap the sides of the equation
⇒[tex] \sf{12.5 \: l = 220}[/tex]
Divide both sides of the equation by 12.5
⇒[tex] \sf{ \frac{12.5 \: l}{12.5} = \frac{220}{12.5} }[/tex]
Calculate
⇒[tex] \sf{l = 17.6 \: m}[/tex]
Length of rectangular piece of land ( l )= 17.6 m
Finding perimeter of rectangular piece of land
[tex] \boxed{ \sf{perimeter \: of \: rectangle = 2(l + b)}}[/tex]
plug the values of length and breadth
⇒[tex] \sf{2(17.6 + 12.5) }[/tex]
Add the numbers
⇒[tex] \sf{2 \times 30.1}[/tex]
Multiply the numbers
⇒[tex] \sf{60.2 \: m}[/tex]
Therefore, Perimeter of rectangular piece of land is 60.2 m
Hope I helped!
Best regards!!
heplfdjnhkmxdjnhkml,;.
Answer:
d
Step-by-step explanation:
im pretty sure the right answer would be 12 and 21 just doesn't look right
How to solve 5(10 - 1) using order of operation
Answer:
45
Step-by-step explanation:
Answer: 45
Step-by-step explanation: Parentheses first.
10-1=9. Next is multiplication. 5(9)=45.
Water flows through a pipe at a rate of 6300 liters every 8.5 months. Express this rate of flow in cubic feet per hour. Round your answer to the nearest hundredth.
Answer:
0.04
Step-by-step explanation:
[tex] \dfrac{6300~L}{8.5~month} \times \dfrac{1000~cm^3}{1~Liter} \times \dfrac{1~ft^3}{(30.48~cm)^3} \times \dfrac{12~months}{1~year} \times \dfrac{1~year}{365.25~days} \times \dfrac{1~day}{24~hours} \times \dfrac{1~day}{24~hours} = [/tex]
[tex]= 0.04 \dfrac{ft^3}{hour}[/tex]
The value of the flow rate in cubic feet per hour is 0.04.
What is the rate of flow?The rate of the flow of the fluid is defined as the volume of the fluid flowing through the cross-section per unit of time. The unit of the flow rate is cubic feet per hour or cubic meter per hour etc.
Given that water flows through a pipe at a rate of 6300 liters every 8.5 months. Then the flow rate in cubic feet per hour will be calculated as below:-
1 litre = 0.0353 cubic feet
6300 litres = 6300 x 0.0353
6300 litres = 222.4 cubic feet
1 month = 730 hours
8.5 months = 6205 hours
The rate of flow in cubic per hour will be:-
Rate of flow = 222.4 / 6205 = 0.04 cubic feet per hour
Therefore, the value of the flow rate in cubic feet per hour is 0.04.
To know more about the rate of flow follow
https://brainly.com/question/21630019
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Fraction that less then 5/6 dominater is 8
Answer:
1/8, 2/8, 3/8, 4/8, 5/8, 6/8
Step-by-step explanation:
If i have interpreted correct. You want to know a fraction with a denonminator of 8 that is less than 5/6
5/6=0.8333
Multiple Answers
1/8, 2/8, 3/8, 4/8, 5/8, 6/8
Enter the correct value so that each expression is a perfect square trinomial
Answer:
Step-by-step explanation:
1). x² - 10x + a²
By using the formula of (a - b)² = a² - 2ab + b²
x² - 2(5)x + a²
Therefore, for a perfect square of the expression a should be equal to 5.
Therefore, (x² - 10x + 25) will be the answer.
2). x² + 2ax + 36
= x² + 2(a)x + 6²
For a perfect square of the given expression value of a should be 6.
x² + 2(a)x + 6² = x² + 2(6)x + 6²
= (x + 6)²
Therefore, x² + 12x + 36 will be the answer.
3). [tex]x^{2}+\frac{1}{2}x+a^2[/tex]
[tex]x^{2}+2(\frac{1}{4})x+a^2[/tex]
To make this expression a perfect square,
a² = [tex](\frac{1}{4})^2[/tex]
[tex]x^{2}+2(\frac{1}{4})x+(\frac{1}{4})^2[/tex] = [tex](x+\frac{1}{4})^2[/tex]
Therefore, the missing number will be [tex]\frac{1}{16}[/tex].
Answer:
it's 1/16 you're welcome!
Step-by-step explanation: