Question 5 (SO3 ACT) Which one of the following is not irrationa?
23:4 and 5
Question 6 (S03 AC1. AC3)
3
2
B
3
A B C and D are rectangles
a) Find the length of the diogonal d. of each rectangle, use Pythogoros' Thecrem
А
с
D
B

sorry i got nothing

step-by-step explanation:

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.