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3 years ago

P(x)=-3(x-5)^2+12 in Stanford form

Mathematics

1 answer:

mariarad [96]3 years ago

4 0

P(x)=-3x^2+30x-63 answerrrr

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An instructor computed a least squares regression line to predict final course percentage based on Exam 1. She got the following

blondinia [14]

Answer:

8.0372

Step-by-step explanation:

given that an instructor computed a least squares regression line to predict final course percentage based on Exam 1.

The regression equation was found out as

$y hat = 34.28+0.5897x$

When a student makes a grade of 76 one exam 1, and 71.66% in final exam we have

$x = 76 and y = 71.66$

Substitute to get the estimated y as per regression line as

$y hat =34.28+0.5897(76)\\=79.0972$

Residual = difference between y hat and y

= $|79.0972-71.66|\\= 8.0372$

8 0

3 years ago

Question 5 Unsaved

Otrada [13]

We can use the compound interest formula

F=P(1+i)^n

where

F=Future value of investment to be found

P=present value of investment ($1000)

i=interest per period (1/4 year)=0.04/4=0.01

n=number of periods (3 years * 4 quarters = 12)

Substitute or "Plug in" values, so to speak,

F=1000*(1+0.01)^12

use a calculator to do the sum

=1126.83 (to the nearest cent, and use the proper rounding rules)

3 0

3 years ago

20% of 60 is? This question was had fr me to answer

Liula [17]

Answer: 12

To get 12 you multiply 20%×60 and get 12.

Note: When finding the answer to these types of problems, multiply the percent times the number.

4 0

3 years ago

Read 2 more answers

Evaluate the following expression. [4 + (12 - 2) ÷ 5] ÷ 7

Anika [276]

Answer:

[4 + (12 - 2) ÷ 5] ÷ 7

[4 + 6 / 5] / 7

[10 / 5] / 7

2 / 7

= 2/7 or 0.28571428571

7 0

2 years ago

Read 2 more answers

!!!please for the love of God help me!!!

Grace [21]

<h3>Given :-</h3>

$\\$

x=y-1
x+2y=8

$\\$

$\\$

Value of x
Value of y

$\\$

<h3>Solution:-</h3>

Let say it is first equation:-

x=y-1. . . . (1)

and this is second equation:-

x+2y=8 . . . . (2)

$\\ \\$

Simplifying 1 equation:-

x = y - 1
x +1 = y
y = x + 1

Put this value of y in second equation.

$\\$

$\dashrightarrow \sf \: x+2y=8$

$\\$

$\dashrightarrow \sf \: x+2(x + 1)=8$

$\\$

$\dashrightarrow \sf \: x+2x +2=8$

$\\ \\$

$\dashrightarrow \sf \: 3x +2=8$

$\\ \\$

$\dashrightarrow \sf \: 3x=8 - 2$

$\\ \\$

$\dashrightarrow \sf \: 3x=6$

$\\ \\$

$\dashrightarrow \sf \: x=6 \div 3$

$\\ \\$

$\dashrightarrow \sf \: x= \bf2$

$\\$

to find value of y :-

y = x + 1

y = 2 + 1

y = 3

$\\$

verification:-

$\\$

1 equation:-

x = y - 1

put value of x and y

2 = 3 - 1

2 = 2

LHS = RHS

Hence verified!

$\\$

2 equation:-

$\\$

x+2y=8

put value of x and y

2 + 2 × 3 = 8
2 + 6 = 8
8 = 8

LHS = RHS

Hence verified!

$\\$

Both equation verified!

.°. value of x and y is 2 and 3 respectively

7 0

2 years ago