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galina1969 [7]
2 years ago
9

Can someone pls help me with this?

Mathematics
2 answers:
serg [7]2 years ago
7 0

Answer:

A. 5

Step-by-step explanation:

Plug each x value into the equation 3x + k

Substitute each answer choice for k

Whenever they match the values under the equation, you have the answer.

3 (1) + 5 = 8

3 (3) + 5 = 14

3 (5) + 5 = 20

Lisa [10]2 years ago
5 0

Answer: A

Step-by-step explanation: 3(1)+k =8 8-3=5

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Determine if the equation below is a function with independent variable x. If so, find the domain. If not, find a value of x to
Andre45 [30]

Answer:

No because it contains points (3,4) and (3,-4).  You cannot have a x assigned to more than one y-value if you want it to be a function.

Step-by-step explanation:

A function has one output per input.

If we are trying to determine if the given is a function of x, then x is the input.

However I can get two outputs from plugging in x=3.

3^2+y^2=25

9+y^2=25

Subtract 9 on both sides:

y^2=25-9

y^2=16

Take the square root of both sides:

y=\pm \sqrt{16}

y=\pm 4.

So input x=3 yields y=4 and y=-4.

Since this input has more than one output then the given is not a function of x.

----Also!

If you graph the equation, it is a circle with radius 5 and center (0,0). So I could I plug in any number for x between -5 and 5 excluding -5 and 5 which would yield only one output each. Since plugging in either one gives:

(\pm 5)^2+y^2=25

25+y^2=25

Subtract 25 on both sides:

y^2=25-25

Simplify:

y^2=0

There is only one value y such that when you square it gives you 0. That is 0.

x=5 only gives y=0 and x=-5 only gives y=0.

There is no circle, unless it is a circle with radius 0 which means it really wouldn't be a circle, that is a function.

8 0
3 years ago
Is (p3)4 • p8 = p20 true or false ?
Oduvanchick [21]
P3(4) = p12 them p12 * p8 = P160 (false)
8 0
3 years ago
The ball park is selling a hamburger combo. At the end of the day, they collected $103.95. If a total of 21 hamburger combos wer
Evgesh-ka [11]

Answer:

Each combo costed $4.95

Step-by-step explanation:

To solve, simply divide 103.95 by 21, and then put a dollar sign. (Most teachers would count no dollar sign as incorrect/points off, so don't forget it!)

103.95 ÷ 21 = 4.95 → $4.95

<em>Hope this helps!</em>

5 0
3 years ago
What is the approximate equation of this line of best fit in slope-intercept form?
Anni [7]

Answer:  y = negative 10 over 13x + 13

Step-by-step explanation: might not be right but im 70% sure it can be but make sure to check

7 0
2 years ago
Read 2 more answers
2. While on vacation, Erika's favorite activity is catching some rays while reading novels by the pool.
stiks02 [169]

Answer:

144 pages

Step-by-step explanation:

3 hours * 60 = 180 minutes

40 pages / 50 minutes = x pages / 180 minutes

40/50 = x/180

cross multiply

50x = 40 * 180

50x = 7200

x = 7200 ÷ 50

x = 144

4 0
3 years ago
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