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➷ Use the simultaneous equations method:
x - 4y = 6
3x + 4y = 10
Add these two equations together to cancel out 'y':
4x = 16
Divide both sides by 4:
x = 4
substitute this value into one of the equations:
(4) - 4y = 6
Subtract 4 from both sides:
- 4y = 2
Divide both sides by -4:
y = -0.5
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Answer:
x = 10
y = 70
Step-by-step explanation:
By using the vertical angles theorem we know that x+ y +10 = 90, also simplified to x + y = 80
and 2x + y = 90
By using the substitution method on x + y = 80, it will be y = -x + 80
When you put into the equation 2x + y = 90 you will get 2x -x +80 = 90
Then it will simplify to x = 10
After that plug 10 into x + y = 80 to 10 + y = 80 and get y = 70
A. √0.6 is irrational but rest are all rational
Answer:
8:7
Step-by-step explanation:
A <em>scale</em> factor (SF) is the ratio of two corresponding side lengths in similar figures.
The two circles are the similar figures, and the SF is the ratio of their corresponding radii.
SF = outer radius/inner radius
= (35 + 5)/35
= 40/35
= 8/7
The scale factor is 8:7.