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iris [78.8K]
3 years ago
7

Solve using substitution. x + 3y = -13 5x + 7y = -9

Mathematics
1 answer:
baherus [9]3 years ago
6 0
From equation 1
x = -3y-13
plug this into equation 2:-
5(-3y-13) + 7y = -9
-15y - 65 + 7y = -9
-8y = 56
y = -7 
Now plug y = 7 into equation 1
x - 21 = -13
x =  -13 + 21 = 8

solution is x = 8 , y = -7

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Explain two different ways to simplify 6/12
deff fn [24]
You can simplify it as...
3/6: Because that's 6/2 and 12/2, so the numerator and denominator recieve the same operations
2/4: Because it's 6/3 which = 2, and 12/4 which = 4
1/2: Because it's 6/6=1 and 12/6=2

I hope this helped! If you have any other questions, just ask, and I hope you have a great day! :)


3 0
3 years ago
Read 2 more answers
To successfully escape a planet's gravity, a space ship must achieve escape velocity, which for Earth is 11.2 km/s or 25,054 mil
melisa1 [442]

Answer:

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Step-by-step explanation:

The time in hours is given by the distance divided by velocity.

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4 0
3 years ago
∠A and ∠B are supplementary, and ∠A and ∠C are supplementary. Which conclusion is valid? Select one: A. ∠B and ∠C are supplement
zysi [14]

Option D is the correct answer.

Answer:

D. ∠B and ∠C are congruent.

Step-by-step explanation:

Since, ∠A and ∠B are supplementary.

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Since, ∠A and ∠C are supplementary.

Therefore,

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From equations (1) & (2)

∠A + ∠B = ∠A + ∠C

=> ∠B = ∠C

Hence, ∠B and ∠C are congruent.

4 0
3 years ago
In order to qualify for the tournament, basketball teams have to win at least 70% of their games. This season, the Bears lost 6
stealth61 [152]
The bears won 9 games.
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Hope this helped
3 0
3 years ago
A square is shown below. Which expression can be used to find the area, in square units, of the shaded triangle in the square?
AlexFokin [52]
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6 0
3 years ago
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