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timurjin [86]
3 years ago
7

X+y=20 3x-3y=30 Which values of x and y satisfy this system of equations?

Mathematics
1 answer:
puteri [66]3 years ago
4 0

x +y = 20 ( rewrite as x = 20-y)

3x - 3y =30

3(20-y) - 3y = 30

60-3y - 3y = 30

60-6y = 30

-6y = -30

y = -30 / -6 = 5

x=20-5 = 15

x = 15, y = 5

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in triangle ABC, if the length of side b is 3 centimeters and the measures of angle B and angel C are 45⁰ and 60⁰, respectively,
statuscvo [17]
<h3>Answer: 3.67 centimeters approximately</h3>

Use the law of sines to get this answer

b/sin(B) = c/sin(C)

c/sin(C) = b/sin(B)

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c = sin(60)*( 3/sin(45) )

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7 0
3 years ago
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6 0
3 years ago
-1/2 +2=-x+7 how do you figure this out​
Feliz [49]

Answer:

x = 5.5

Step-by-step explanation:

Solve for x by simplifying both sides of the equation, then isolating the variable.

-\frac{1}{2} +2=-x+7

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3 0
3 years ago
We know the following about the numbers a, b and c:
labwork [276]

Step-by-step explanation:

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By adding these three equations together and dividing both sides by 2, we get the value of a + b + c.

Possible combinations for a + b + c such that the sum is greater than or equal to 1 are:

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3 0
3 years ago
If 29% of the students wore jeans what percent of he students did not wear jeans?
igor_vitrenko [27]

So you just take 100% - 29% = 71%

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7 0
3 years ago
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