Answer:
Step-by-step explanation:So we know x + y = 21 and 5x +10y = 165 We line them up in columns x + y = 21 5x +10y = 165 To eliminate the x variable, I'll multiply every element in the 1st equation by -5. -5x + -5y = -105 5x + 10y = 165 Now we combine (add) the equations, which eliminates x altogether. 5y = 60 ... y = 12 From there, x + 12 = 21 ... x = 21-12 ... x = 9 You should double check. Do 9 nickles and 12 dimes equal $1.65? A very important thing to remember using this method is to do the same thing to each element in the equation that you change! I hope that helps.
Intersecting lines can be lying in a plane. An example is the Cartesian coordinate system where systems of equations can be defined by their intesecting points by plotting the equations in the plane coordinate system. In this case, the answer to this problem is B. False
Answer:
89°
Step-By-Step Explanation:
<WYT is the angle 4
<UYW is the angle 5
since angle 4 and 5 are on the same line and
anngle 4 is 91°,
180° - 91° = 89°
This shows that <UYW is 89°
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Answer:
No
Step-by-step explanation:
- 20 ÷ 9 = 2.222222222
- 9 does not go evenly into 20, and there can't be a fraction of a student, so the answer is no.
I hope this helps!
