Step-by-step explanation:
you know by using the x and y coordinates of the point in the equations and see, if both equations are still true.
if yes, it was a solution, and if just only one is false, then it was not a solution.
(3, -2) in
y + 4x = 10
5x - y = 13
so,
-2 + 4×3 = 10
-2 + 12 = 10
10 = 10 true
5×3 - (-2) = 13
15 + 2 = 13
17 = 13 false
so, it was NOT a solution.
Answer:
2x^2-18
Step-by-step explanation:
2x to the power of 2 minus 18
10 divided by 5 =2 floors per second. Divide 2 by 1= 1. 1 floor in 1 second.
Use Cymath just type it in
Answer:
6 bags of cucumber
4 bags of spinach
Step-by-step explanation:
let s = number of bags of spinach
let c = number of bags of cucumber
If the owner washed 10 bags of vegetables in total, then
s + c = 10
The spinach came in 10kg bags and the cucumbers came in 9kg bags, and the owner washing 94kg of veg in total:
10s + 9c = 94
Rewrite s + c = 10 to make s the subject, substitute it into 10s + 9c = 94, then solve for c:
s + c = 10
⇒ s = 10 - c
⇒ 10(10 - c) + 9c = 94
⇒ 100 - 10c + 9c = 94
⇒ -c = -6
⇒ c = 6
Substitute c=6 into s + c = 10 and solve for s:
s + 6 = 10
⇒ s = 4
