Does the ordered pair (−1,−3) satisfy the following system of equations? {2x+5y=−17−4x+3y=−5

Mathematics

1 answer:

andreev551 [17]3 years ago

5 0

Answer:

yes

Step-by-step explanation:

Try it and see:

2(-1) +5(-3) = -2-15 = -17 . . . . . works in the first equation

-4(-1) +3(-3) = 4 -9 = -5 . . . . . . works in the second equation

Yes, the ordered pair (-1, -3) satisfies the equations.

Or, you can check the solution using a graphing calculator.

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Marvin spent 3.4 hours which is 40% of his time at the recreational center playing ping pong. How long was Marvin at the recreat

IceJOKER [234]

Answer:

= 8.5 hours

= 8 hours 30 minutes

Step-by-step explanation:

Full time spent = 100%

If 40% = 3.4 hours ,

What about 100% = ?

= (100 x 3.4) ÷ 40

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= 8.5 hours

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3 years ago

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kotykmax [81]

Answer:

See the attachment

Step-by-step explanation:

7. The common difference is 4, so the next term will be 17+4 = 21, and the term after that will be 21+4 = 25. Figuring the next two terms as 21, 25 is sufficient to select the appropriate answer.

8. The table entry (0, 14) tells you only choices G and J are viable. The difference between terms of 22-14 = 8 tells you the appropriate choice is the one with a slope of 8, choice G.

9. In a linear equation, the sum of exponents of the variables in any/every term must not be greater than 1. (All exponents must be integers, as they are here.) Selections A and D have squared terms, so are not linear. Selection C has the product of variables "xy", so is not linear.