1. x.x=7.7 (nhân chéo)
<=>x^2 = 49
<=>x = 7
2. x= 31/40
Answer: 22.575
If you round up, it is 22.6.
I hope you get a 100! Best of luck!!!
Answer:
it equals x=10 so i guess it's B
Step-by-step explanation:
Answer:
10. b 11. b 12. b 13. a 14. b 15. b 16. a 17. a 18. b 19. a 20. a 21. b
Step-by-step explanation:
I'm pretty sure they are all right
350 hamburgers were sold on Tuesday.
Step-by-step explanation:
Given,
Number of hamburgers and cheeseburgers sold = 774
Let,
Number of hamburgers sold = x
Number of cheeseburgers sold = y
According to given statement;
x+y=774 Eqn 1
y = x+74 Eqn 2
Putting value of y from Eqn 2 in Eqn 1
Dividing both sides by 2
350 hamburgers were sold on Tuesday.
Keywords: linear equation, substitution method
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