−10x+5y=10
x−5y=−28
Rewrite equations:
x−5y=−28
−10x+5y=10
Step: Solve:
x−5y=−28
x−5y+5y=−28+5y(Add 5y to both sides)
x=5y−28
Step: Substitute:
−10x+5y=10
−10(5y−28)+5y=10
−45y+280=10(Simplify both sides of the equation)
−45y+280+−280=10+−280(Add -280 to both sides)
−45y=−270
−45y
−45
=
−270
−45
(Divide both sides by -45)
y=6
Step: Substitute:
x=5y−28
x=(5)(6)−28
x=2(Simplify both sides of the equation)
Answer:
x=2 and y=6
Answer: To solve this question, you would first measure yourself and your self and your shadow, and then the shadow of the tower while the sun is in spot in the sky, you will then use the ratio (your height/your shadow) = (towers height/ towers shadow)
You will then cross multiply and divide to find the towers height
Step-by-step explanation:
70 times .9 is 63 so 90 minus 63 is27 so it was $27
Answer:
20 degrees
Step-by-step explanation:
