4 years ago

Solve by substitution

Mathematics

1 answer:

Triss [41]4 years ago

4 0

A=πr2=π·5.52≈95.03318

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Is the point (4,2) the solution to the system? Why or why not? Explain your reasoning.

VMariaS [17]

Solve the top equation to get on variable on one side
2x-y=6
-y=-2x+6
y=2x-6
then plug in the coordinate for x and y for both equations. if both equations are true then it’s a solution
2=2(2)+6
2=10

4+2=6

so it’s not a solution

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3 years ago

HIIII peeps what is 4+2 +43 ( i'm boredddd)

DochEvi [55]

Answer:

Step-by-step explanation:

43 +4 make sure you add them

47 +2

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3 years ago

2 points

sattari [20]

Answer:

well the answer is 7 rides

Step-by-step explanation:

25 - 4

=21

21÷3

(p.s working might not be in the right format but its right)

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3 years ago

Simplify the expression (-8)^-3x15^0

avanturin [10]

The answer is -1 over 512 (fraction form)
ANSWER: -1/512

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3 years ago

In a certain game, a player can solve easy or hard puzzles. A player earns 30 points for solving an easy puzzle and 60 points fo

Aleksandr-060686 [28]

Answer: Second option.

Step-by-step explanation:

Let be "e" the number of easy puzzles Tina solved and "h" the number of hard puzzles Tina solved.

Set up a system of equations:

$\left \{ {{e+h=50} \atop {30e+60h=1,950 }} \right.$

You can use the Eliminationn Method to solve this system of equations:

Multiply the first equation by -30.
Add the equations.
Solve for "h".

Therefore, through this proccedure, you get:

$\left \{ {-30e-30h=-1,500} \atop {30e+60h=1,950 }} \right.\\.........................\\30h=450\\\\h=\frac{450}{30} \\\\h=15$

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3 years ago