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2 years ago

Create an equivalent system of equations using the sum of the system and the first equation.

Mathematics

2 answers:

Rzqust [24]2 years ago

6 0

Answer:

B) {-5x + 4y = 8

{-x + 5y = 10

Step-by-step explanation:

Add like it said, and you will see your answer.

Art [367]2 years ago

3 0

Answer:

Option B

$-5x+4y=8$

$-x+5y=10$

Step-by-step explanation:

We are given that

System of equations

$-5x+4y=8$

$4x+y=2$

We have to find an equivalent system of equations using sum of system and first equations

Sum of system of equations

$-5x+4y+4x+y=8+2$

$-x+5y=10$

Therefore, option B is true.

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Answer:

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Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Solve the System using elimination. 5x-2y=15 7x+7y=-28

steposvetlana [31]

Answer:

x=1 y=-5

Step-by-step explanation:

7(5x-2y=15) ---> 35x-14y=105

2(7x+7y=-28) --> + 14x+14y=-56

49x=49 --->x=1

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2 years ago

What value added to x^2+2x would complete the square?

svetlana [45]

D is the only one which would make sense :)

7 0

2 years ago

When a cold drink is taken from a refrigerator, its temperature is 5°C. After 25 minutes in a 20°C room its temperature has incr

Andrews [41]

Answer:

(a) 13.85 °C

Step-by-step explanation:

The temperature difference is a decaying exponential function of time. Here, it decreases from an initial difference of 15 °C to 10 °C after 25 minutes. So, that temperature difference can be modeled as ...

ΔT = 15(10/15)^(t/25)

We want to find the value of this at t=55. It is ...

ΔT = 15(2/3)^(55/25) ≈ 6.15

This is the amount the temperature of the drink is below room temperature.

drink temperature = (20 - 6.15) °C = 13.85 °C

The temperature of the drink after 55 minutes is about 13.85 °C.

3 0

2 years ago