MATHEMATICS HIGH SCHOOL

Hi, anyone able to help with qn 7? Thanks :)!

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

I used the quadratic formula to find the roots of $x^(2) + x -1$

$a=(-1-√(5))/(2) b=(-1+√(5) )/(2)$

$(1 )/(√(3) ) *((-1-√(5))/(2) )^(2) * (-1+√(5))/(2)$

$(1 )/(√(3) ) *((-1-√(5))/(2) ) * (-1+√(5))/(2)*((-1-√(5))/(2) )$

$(1 )/(√(3) ) *((-1-√(5))/(2) ) * (-1+√(5)-√(5) -4)/(4)$

$(1 )/(√(3) ) *((-1-√(5))/(2) ) * ( -4)/(4)$

$(1 )/(√(3) ) *((-1-√(5))/(2) ) * -1$

$(-1-1√(5) )/(2√(3) )*-1$

$(-1-1√(5) )/(2√(3) ) = (√(5)+1 )/(2√(3) )$

Related Questions

What is 6:12 in simplest form? A. 2:1 B. 1:2 C. 2 D. 12:6
Mike has 21 pounds of tomatoes and 9 pounds of mixed peppers from his garden that he will use to make salsa and tomato sauce. The graph represents the system of equations shown.A system of equations. x plus 5 y equals 21. x plus y equals 9.The variable x represents the number of batches of salsa that can be made and y represents the number of batches of tomato sauce that can be made.A coordinate grid showing Garden Produce with Batches of Salsa on the x axis and Batches of Tomato Sauce on the y axis and two lines. The first line passes through (0, 9) and (6, 3). The second line passes through (1, 4) and (6, 3).Which statement is true about the graph?Mike can make 3 batches of salsa and 6 batches of tomato sauce using all of his garden produce.Mike can make 3 batches of salsa and 3 batches of tomato sauce using all of his garden produce.Mike can make 6 batches of salsa and 3 batches of tomato sauce using all of his garden produce.Mike can make 6 batches of salsa and 9 batches of tomato sauce using all of his garden produce.
Please help!! thank you.
Chef Rita is cooking for a Sunday brunch. she knows that 22 pancakes can feed 8 people. She is wondering how many people she can feed with 55 pancakes. She assumes each person eats the same quantity of pancakes
What can you conclude ?? Need answer soon

The length of a rectangle is 4 cm more than the width and the perimeter is at least 40 cm. What are the smallest possible dimensions for the rectangle, in cm?

Answers

Answer:

Try timesing

Step-by-step explanation:

Can you guys help me out with number 13

Answers

$r=1.6w+2\n 1.6w=r-2\n w=0.625r-1.25 \Rightarrow D$

HELP. I don't know if I'm supposed to put in theorems or?? It's a fill in the blank for a,b,c,d, and e.
Pretty sure A and B are "Given" but not 100%.

Answers

I hope this helps you

Solve 5x+y=23 3x+y=17

Answers

Answer:

y = 8

x = 3

Step-by-step explanation:

5x+y=23

3x+y=17

cancel out the Xs

15x + 3y = 69

-15x - 5y = -85

-2y = -16

y = 8

Plug in 8 for the Y in any of the equations it doesn't matter

3x + y = 17

3x + 8 = 17

3x = 9

x = 3

hope this helps

❌❌EVALUATE SQUARE ROOTS❌❌1. Evaluate 6 + √14 + x - √9x when x = 2.

a) 10 - 3√2

b) 10 - √2

c) 7

d) -4

2. Evaluate 6 + √14 + x - √9x when x = 2. (Write as decimal)

a) 14.24

b) 7

c) 5.76

d) -4

Thank you !

Answers

The first answer is A then the next answer is C

Simplify the radical expression sqrt 7+3 sqrt 7

Answers

4 $√(7)$

This is because there is an imaginary 1 in front of the first sqrt.

√7+3√7 = 4√7
thus answer is 4√7