Answer:
5 seconds and 488 ft
Step-by-step explanation:
(a)
given a quadratic in standard form
y = ax² + bx + c ( a ≠ 0 ), then
the x- coordinate of the vertex is
x = - [tex]\frac{b}{2a}[/tex]
y = - 16x² + 160x + 88 ← is in standard form
with a = - 16 and b = 160 then
[tex]x_{vertex}[/tex] = - [tex]\frac{160}{-32}[/tex] = 5
the maximum height is at the vertex, the turning point on the graph
then it takes 5 second to reach its maximum height
(b)
to find the maximum height substitute x = 5 into the equation
y = - 16(5)² + 160(5) + 88
= - 16(25) + 800 + 88
= - 400 + 888
= 488
maximum height is 488 ft
A guidance counselor reports that in a given semester, the probability that a student chooses art as an elective is 15 percent, the probability that a student chooses art or drama is 20 percent, and the probability that a student chooses both art and drama is 2 percent. what is the probability that a student chooses drama as an elective?
The probability that a student chooses drama as an elective is 7%.
What is the concept of probability?Probability is the study of the odds of obtaining each outcome of a random experiment. These odds are assigned the real numbers in the range between 0 and 1. Results closer to 1 are more likely to occur.
In this case, we can call:
A represents ArtD represents Drama.So, the information given was:
P(A) = 15%P(A or D) = 20%P(A and B) = 2%The formula will be:
P(A or D) = P(A) + P(D) - P(A and D)
So:
[tex]20\% = 15\% + P(D) - 2\%\\P(D) = 20\% - 15\% + 2\%\\P(D) = 7\%[/tex]
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Tara is making dinner for 9 people. she mixes 114 kilograms of rice with 500 grams of vegetables and 410 grams of meat. if all of the food is split evenly among the diners, what is the size of each serving?
a.240 grams
b.244 grams
c.250 grams
d.256 grams
Answer:
Step-by-step explanation:
Remark
An amount no 9 people could consume. 114 kg is a huge amount of cooked rice. I' going to give a solution that says the rice is 114 grams of rice and see what happens.
Givens
rice = 114 grams
veggies = 500 grams
meat = 410 grams
Solution
Add the givens
114
500
410
Total = 1024 grams
If 9 people are going to be present, (I assume that includes Tara), then each person will get 1024 / 9 = 113.8 which is none of the choices. There is something wrong with the problem. I would suggest you ask your teacher how this is done.
Answer
None of those given
What is the midpoint of AB?
Answer:
[tex](-4, -\frac{1}{2} )[/tex]
Step-by-step explanation:
A (-5, -4)
B (-3, 3)
We can apply the midpoint formula: [tex](\frac{-5 + -3}{2} , \frac{-4 + 3}{2} )[/tex]
[tex]= (-4, -\frac{1}{2} )[/tex]
hope this helped! :)
Find the length of z. Round your answer to the nearest tenth.
please help TT i cant fail this quarter
The value of x in the diagram is : 75°
what is an isosceles triangle?An isosceles triangle is a type of triangle with base angles equal and opposite sides equal.
Analysis:
Since GF = EF
∠FGE = ∠FEG = (x - 18)°( base angles of an isosceles triangle are equal)
∠FGE + ∠FEG + ∠GFE = 180°( sum of angles in a triangle)
(x - 18)° + (x-18)° + 66 = 180
2x -36 + 66 = 180°
2x + 30 = 150
2x = 180 - 30
2x = 150°
x = 150/2 = 75°
In conclusion, the value of x in the diagram is 75°
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Mr. Smith works 26 hours and earns $468. If Mr. Smith works for 16 hours, how much does he earn?
I got $ 288 but I just want to make sure
Answer:
$288
Step-by-step explanation:
468 ÷ 26 = 18
so $18 per hour times 16 hours would give you $288, your right
reflection across y = 1
Answer:
Vertical Reflection Apply a reflection over the line y=-1 The procedure to determine the coordinate points of the image is the same as that of the previous example with minor differences in that the change will be applied to the y-value and the x-value stays the same.
Step-by-step explanation:
BRAINLIST PLEASEif you have 48 apples and you gave your friend molly 20 and you gave your brother and mom 18 each how much apples do you have now?
Answer:
10
Step-by-step explanation:
48-20=28
28-18=10
that is how I see it at least
fast i need it thanks
Answer:
trigonometry is difficult haha…. Answer is 8.81 I think
Step-by-step explanation:
Please help me solve for Z
The correct value of z in this figure is 190⁰
The image given in this question is of a circle. To solve it, let's calculate it as an equation of the first degree.
– First, let's: add the data that are on the circle and equate the equality as 360⁰, which is the value of the degree of a circle.
145 + 24 + z = 360⁰
– Now, let's: add the natural terms to each other. And finally, we'll isolate z and subtract 360⁰ by the number that's left.
145 + 24 + z = 360⁰
170 + z = 360⁰
z = 360⁰ - 170
z = 190⁰
So, the value of z, will be 190⁰
One-third of the Socer training participants are four-fifths of the Dance training
students. Twelve Dance training students do not participate in the Soccer training.
What is the total number of students who participate in the Soccer training?
Answer:
There are a total of 144 students in soccer training.
Step-by-step explanation:
12x5=60
60-12=48
48=4/5
4/5=1/3
1/3 = 48
48x3= 144
1. Which is a set of collinear points? (1 point)
J, H, I
L, H, J
J, G, L
L, K, H
Which expression is equivalent to 5m + 8m?
m + 13
12m
13m
13
m
Answer:
13 m
Step-by-step explanation:
5m + 8m = 13m
The answer is 13m as both of them are like term and can be added....
What is the answer to this question?
Answer:
[tex]\huge\boxed{\bf\:tan \: Z= \frac{4}{3}}[/tex]
Step-by-step explanation:
We know that, tan θ = opposite side of ∠θ / adjacent side of ∠θ.
Here, we need to find tan Z,
In this triangle for ∠Z,
Opposite side = 28Adjacent side = 21Then,
tan Z
= opposite side / adjacent side
= 28 / 21
= 4 / 3
[tex]\rule{150pt}{2pt}[/tex]
A graph of f(x) = 6x2 + 7x – 3 is shown on the grid.
What are the zeros of f ?
Answer:
Option d
Step-by-step explanation:
The zeroes of given function can be obtained from graph when the graph intersects at x axis
Ms. lewis has 20 students in her p.e. class.
she puts each student's name in a hat and will select
the names of 2 students at random as team leaders for
a volleyball game. how many different pairs of team
leaders could she choose?
Considering the definition of combination, she could choose 190 different pairs of team.
What is combinationCombinations of m elements taken from n to n (m≥n) are called all the possible groupings that can be made with the m elements in such a way that not all the elements enter; the order does not matter and the elements are not repeated.
To calculate the number of combinations, the following formula is applied:
[tex]C=\frac{m!}{n!(m-n)!}[/tex]
The term "n!" is called the "factorial of n" and is the multiplication of all numbers from "n" to 1.
Different pairs of team leadersMs. lewis has 20 students in her p.e. class. She puts each student's name in a hat and will select the names of 2 students at random as team leaders for a volleyball game.
So, you know that:
m= 20n= 2Replacing in the definition of combination:
[tex]C=\frac{20!}{2!(20-2)!}[/tex]
Solving:
[tex]C=\frac{20!}{2!18!}[/tex]
C= 190
Finally, she could choose 190 different pairs of team.
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please awnser quickly
Answer:
B': (-8,2)
C':(-8,9)
D':(-5,4)
Step-by-step explanation:
If im wrong pls tell me!
19. Solve for the angle x.
sin²(2x) = 1
Answer: Е
Step-by-step explanation:
▪︎ a^2 - b^2 = (a-b)(a+b)
sin^2(2x) = 1
sin^2(2x) - 1 = 0
(sin2x - 1)(sin2x + 1) = 0
sin2x - 1 = 0 or sin2x + 1 = 0
sin2x - 1 = 0
sin2x = 1
2x = 90° + 360°n
x = 45° + 180°n
▪︎180° means half of the unit circle, therefore,
x = 45° + 360°n and
x = 45° + 180° + 360°n = 225° + 360°n
sin2x + 1 = 0
sin2x = -1
2x = 270° + 360°n
x = 135° + 180°n
therefore,
x = 135° + 360°n and
x = 135° + 180° + 360°n = 315° + 360°n
n is an integer
NEED HELP ASAAAAP
What is the formula of g in terms of f?
A.f(x+2)
B.f(x)-2
C.f(x)+2
D.f(x-2)
Answer:
D.f(x-2)
g is f shifted to the right by 2. So, f(x-2) is the correct answer.
Hope this helps!!!
Please mark me as brainliest!!!
Choose the histogram that has the smallest variance.
The histogram first represents the smallest variance option first is correct.
What is a histogram?It is defined as the depiction of numerical data in a graph using a bar with no space. The histogram depicts the approximate distribution of the data.
We have four histograms shown in the picture.
As we know in a histogram, the curves that resemble hills show groupings of statistics that are close collectively, leading to low variation.
Whenever the taller bars are farther away from the mean in a histogram, the variability is greater, and when the taller bars are closer to the mean, the variability is less.
In the histogram first, there is very less variability.
Thus, the histogram first represents the smallest variance option first is correct.
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Which algebraic expression represents the situation "add seven to the product of a number and ten"?
Find the volume of the prism.
Answer:
172.8 m^2
Step-by-step explanation:
7.2/2 = 3.6
3.6*4.8 = 17.28
17.28*10 = 172.8
The Simple intrest on $765,000 invested for 3 years at 3% is?
Answer: 68850
Step-by-step explanation:
interest = 765000(3/100x3)
= 68850
if your finding total cost add 765000 + 68850 = 833850
Swimming Pool On a certain hot summer's day, 366 people used the public swimming pool. The
daily prices are $1.25 for children and $2.25 for adults. The receipts for admission totaled $767.50.
How many children and how many adults swam at the public pool that day? There were
children at the public pool.
Answer:
c=__ and a=__
Step-by-step explanation:
767.50=1.25(c)+2.25(a).
366=c+a
normally from here, I would just guess the number of adults and children. It does take a while doing it that way, but maybe you know a quicker way. Hope this helps :)
Beg someone helps me w this question
Answer:
[tex](x+1)^{2} +4[/tex]
a = 1
b = 4
Step-by-step explanation:
hope this helps!! p.s. i really need brainliest :)
all i know is the answer isn’t 10. pls help
Answer:
X is 72 i think
Step-by-step explanation:
all triangle equal 180, triangle formula bxh/2, so i did that and got 72.
Mickey tosses a coin 50 times and records 27 heads. Based on these results, what is the probability if
Mickey tosses the same coin three more times, she will get three tails?
a) 112,833: 125,000
b) 23:50
c) 69:50
d) 12,167: 125,000
The probability of getting three tails in three tosses When Mickey tosses a coin 50 times and records 27 heads is 12,167:125,000.
What is probability of an event?It is the ratio in an event of the number of favorable outcome to the total number of outcome of that event.
As the probability of an event can not be more than the number 1. Thus, he probability of failure of a event is equal to the difference of the 1 to the success of the event.
Mickey tosses a coin 50 times and records 27 heads. Thus, the probability of getting a head is,
[tex]P=\dfrac{27}{50}\\[/tex]
The probability of not getting a head or getting a tail is,
[tex]P^{-1}=1-\dfrac{27}{50}\\P^{-1}=\dfrac{50-27}{50}\\P^{-1}=\dfrac{23}{50}[/tex]
Now, Mickey tosses the same coin three more times. The probability of getting three tails in these tosses are,
[tex]P_{3t}=\dfrac{23}{50}\times\dfrac{23}{50}\times\dfrac{23}{50}\\P_{3t}=\dfrac{12167}{125000}[/tex]
Thus, the probability of getting three tails in three tosses When Mickey tosses a coin 50 times and records 27 heads is 12,167:125,000.
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first correct answer gets brainleist pls help asap
Answer:
The angle is acute. This type of angle must be between 0° and 90°, and Orla's estimate is not.
The _____ is the price of an item that is being offered at a lower price than usual.
Answer:
sale price
Step-by-step explanation:
price of an item that is being offered at a lower price than usual
Identify the slope and y-intercept of the function y = -8x + 1. OA. The slope is 1. The y-intercept is (0, -8). OB. The slope is 8. The y-intercept is (0, 1). O C. The slope is 1. The y-intercept is (0,8). O D. The slope is -8. The y-intercept is (0, 1).
Answer:
d is the answer
Step-by-step explanation:
y=mx+b
m being the slope and b being the y intercept