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Dima020 [189]
3 years ago
5

Find the value of a in the equation below 2sin(1÷4a+20)=√3​

Mathematics
1 answer:
AVprozaik [17]3 years ago
3 0

Step-by-step explanation:

sin(1 \div 4a + 20) =   \sqrt{3}   \div 2 \\ sin(1 \div 4a + 20) =sin 60

1÷4a+20=60

1÷4a=4

a=1/160

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Consider the quadratic function f(x)=−x^2+4x+12
777dan777 [17]
<h2>Answer:</h2>
  • The smallest x-intercept is x= -2
  • The largest x-intercept is x=  6
  • The y-intercept is y= 12
<h2>Step-by-step explanation:</h2>

We are given a function as follows:

y=f(x)=-x^2+4x+12

The x-intercept of a function is the value of x where the function is equal to 0.

i.e.

y=f(x)=0

-x^2+4x+12=0

i.e.

x^2-4x-12=0\\\\x^2-6x+2x-12=0

( We used the method of splitting the middle term)

x(x-6)+2(x-6)=0\\\\(x+2)(x-6)=0

i.e.

x=-2\ and\ x=6

Hence, the smallest x-intercept is: x= -2

and the largest x-intercept is: x=6

The y-intercept is the value of y where x=0

i.e. we have:

y=-0^2+4\times 0+12\\\\y=12

4 0
4 years ago
Assume the table gives data on field goal shooting for two members of the Benedict College 2014-2020 men's basketball team. Seth
Contact [7]

Answer:

(a) What percent of all field goal attempts did Seth Fitzgerald make? (Enter your answers rounded to two decimal places.)

Seth Fitzgerald's overall field goal percentage:__59.69%_____

What percent of all field goal attempts did Roberto Mantovani make? (Enter your answers rounded to two decimal places.)

Roberto Mantovani's overall field goal percentage: ______40.31%________.

(b) Find the percent of all two-point field goals and all three-point field goals that both Seth and Roberto made. (Enter your answers rounded to two decimal places.)

Seth Fitzgerald's two-pointers: _____58.57%_________%

Roberto Mantovani's two-pointers:_____41.43%______ %

Seth Fitzgerald's three-pointers:_____64.58%_______

Roberto Mantovani's three-pointers:_____35.42%_____

(c) Roberto had a lower percent than Seth for both types of field goals, but had a better overall percent. That sounds impossible, select the correct statement concerning the situation.

i) This is an example of Simpson's paradox. The comparison that holds for both field goal groups is reversed when the groups are combined into one group

Step-by-step explanation:

a) Data and Calculations:

Benedict College 2014-2020 men's basketball team:

                               Seth Fitzgerald   Roberto Mantovani        Total

                               Made  Missed        Made   Missed       Made    Missed

Two-pointers          123         118              87           84           210        205

Three-pointers         31            6              17              2            48             8

Total                       154         124           104            86          258        210

a) All field goal attempts = 258 (154 + 104)

Field goal attempts by Seth Fitzgerald = 154/258 * 100 = 59.69%

Goal 154 - 124 = 30/258 * 100 = 11.63%

Roberto Mantovani = 104/258*100 = 40.31%

Goal 104 - 86 = 18/258 *100 = 6.98%

Percent of all two-point field goals and all three-point field goals that both Seth and Roberto made:

Goals by both = 48 (30 + 18) = 48/258*100 = 18.61 (11.63 + 6.98)

Seth Fitzgerald's two-pointers = 123/210*100 = 58.57%

Roberto Mantovani's two-pointers = 87/210*100 = 41.43%

Seth Fitzgerald's three-pointers = 31/48*100 = 64.58%

Roberto Mantovani's three-pointers = 17/48*100 = 35.42%

b) Simpson's paradox, also called Yule-Simpson effect, says that when we combine all of the groups together (e.g. two-pointer and three-pointer games played by Seth and Roberto respectively) and look at the data in total form, the correlation that we noticed before may reverse itself.  The cause of this reversion is lurking variables or numerical values of the data.

4 0
3 years ago
Dana is the campaign manager for a candidate for governor. Through a commissioned poll, she discovers that the candidate's appro
aleksley [76]

Answer:

25.71%

Step-by-step explanation:

Although the first instinct would be to say that his approval rating changed by 18%, the actual percent change for the candidate's approval rating is given by the difference between both polls (18%) divided by the candidate's approval in the first poll (70%):

P=\frac{18}{70} =0.2571=25.71\%

The percent change for the candidate's approval rating was 25.71%

3 0
3 years ago
Gabe went to the amusement park with $40 to spend. His ticket coast $26.50. Write and solve an inequality to show how much he mi
kramer

Answer:

y ≤ 13.5

Step-by-step explanation:

total = $40

spent = $26.50

remaining = $13.50

<em>Gabe can spend the maximum amount of $13.50 </em>

6 0
3 years ago
WILL MAKE BRAINLIEST...PLEASE HELP
devlian [24]
C. The area is increased by a factor of 25.

Hope this helps!
4 0
4 years ago
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