Find the solution(s) to the system of equations. select all that apply y=x^2 - 4 y= 2x-5 - 2 a. (-5-0) b.(1,-3),0)d.(2,0)

B.(1,-3)

Step-by-step explanation:

Given in the question two equation

Equation1

y = x² - 4

Equation2

y = 2x - 5

Substitute y with 2x-5 in equation2

x² - 4 = 2x - 5

x² - 2x + 1 = 0

(x-1)(x-1)=0

x = 1

plug value of x in any equation

y = 2(1)- 5

y = -3

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.