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2 years ago

Line L is NOT a function. The equation of line L could be A) x + 3 = 0. B) y + 3 = 0. C) y + 3x = 0. D) x + 3y = 0.

Mathematics

2 answers:

Damm [24]2 years ago

7 0

Answer:

None of the above.

Step-by-step explanation:

All of these are functions. For each input of x, there is only one output of y. Therefore, they are all functions.

daser333 [38]2 years ago

4 0

Answer:

x+3=0

Step-by-step explanation:

x + 3 = 0 is correct, since it is a vertical line passing through all points of the form (-3, y)

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A = {a, b, c, d}

Helen [10]

Answer:

Johnny is wrong.

$A \cup B = \left\{a,b,c,d,e,f,g,h\right\}$

Step-by-step explanation:

Johnny is wrong.

A better definition would be: $A \cup B$ is the set of all elements that belong to at least one A or B.

So, the elements that belong to both A and B, like c and d in this exercise, also belong to $A \cup B$ .

So:

$A \cup B=\left\{a,b,c,d,e,f,g,h\right\}$

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2 years ago

Dan says that all quadrilaterals are parallelograms. Tom says that it is not true. Explain who is correct??

sineoko [7]

Tom is correct, and Dan is wrong. A quadrilateral is a closed figure with four sides, for example, like a kite. A parallelogram is a four sided rectangular figure with opposite sides that are parallel.

6 0

2 years ago

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Mrs bottlenose is taking her 3 children to sea world. The tickets will cost her $100. If children are half price, how much is th

Westkost [7]

Answer:

50$

Step-by-step explanation:

i might be wrong but if there aren't any trick questions then i think that it should be 50$

hope this helps!

8 0

3 years ago

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Sam practices his guitar for 9 hours each week he practices each song for 3 1/2 hours. What is the greatest number of song he ca

liberstina [14]

Answer:

<em>The greatest number of song he can practice in a week is 2.</em>

Step-by-step explanation:

Suppose, the greatest number of song he can practice in a week is $x$

He practices each song for $3\frac{1}{2}$ hours. So, the total time required for practicing $x$ number of songs $= (3\frac{1}{2}*x)$ hours.

Given that, he practices his guitar for 9 hours each week.

So, the equation will be......

$3\frac{1}{2}*x= 9\\ \\ x= 9\div 3\frac{1}{2}\\ \\ x=9\div \frac{7}{2}=9 \times \frac{2}{7}=\frac{18}{7}= 2.571.... \approx 2$

<em>(Rounded as the greatest whole number)</em>

Thus, the greatest number of song he can practice in a week is 2.

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2 years ago

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The radius of a circle is 10. Using π, which equation expresses the ratio of the circumference of the circle to the circle's dia

aleksley [76]

The ratio of circumference to diameter is independent of the radius.

Defining C=circumference, r=radius, D=diameter = 2r

Circumference = C = 2 π r = π D

ratio of circumference / diameter

= C/D = π

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3 years ago

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