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Rina8888 [55]
3 years ago
9

Work out the size of angle X.​

Mathematics
1 answer:
larisa [96]3 years ago
5 0

Answer:

x = 70°

Step-by-step explanation:

The external angle of a triangle is equal to the sum of the 2 opposite interior angles.

120° is an external angle of the triangle, thus

x + 50 = 120 ( subtract 50 from both sides )

x = 70

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What is 0.3636363636 to the nearest thousandth?
Bad White [126]

Answer: 0.364

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6 0
3 years ago
How many real solutions does this system of equations have? xy = 9<br> y = 3x - 1
tekilochka [14]

Answer:

two real, unequal roots

Step-by-step explanation:

y is definied as y = 3x - 1.  Substitute 3x - 1 for y in xy = 9, obtaining:

x(3x - 1) = 9.  Then:

3x^2 - x - 9 = 0.  In this quadratic, the coefficients are a = 3, b = -1 and c = -9.

Calculating the discriminant b^2 - 4ac, we get (-1)^2 - 4(3)(-9), or 1 + 108, or 109.  Because the discriminant is positive, we have two real, unequal roots.

6 0
3 years ago
Explain how to use what you know about whole number division to check your work when you divide with fractions.
serious [3.7K]

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<h3>What is a Fraction?</h3>

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Suppose there is a fraction, a/b which is equal to c, then,

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brainly.com/question/1301963

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4 0
2 years ago
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Answer:

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So, if at 60 mph it takes 1 hour to get home, then if your speed is divided by four to 15 mph, you need to multiply the time by the same number and thus the answer is 4.

7 0
2 years ago
Identify which type of sampling is used. The name of each contestant is written on a separate card, the cards are placed in a ba
Alexus [3.1K]

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