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Tju [1.3M]
2 years ago
13

Is this a funcion? Explain why. X: -2, 0, 1, -2 Y:4, 5, 4, 5

Mathematics
2 answers:
Alina [70]2 years ago
7 0

Answer:

<em>No</em>

Step-by-step explanation:

it isn't a Function because the Domain (X coordinate) repeats a number.

Take this note:

Domain (x) repeats: Not a function

Domain(x) doesn't repeat: Function

Hope this helps ;)

Minchanka [31]2 years ago
4 0
No it isn’t a function because of the domain
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8. Trish made a few pans of brownies to sell.
abruzzese [7]

Answer:

Trish made 2 pans of brownies

Step-by-step explanation:

So essentially 84/12 is 7 pans if Rachel made 5 pans and we know that using subtraction we can easily solve this by subtracting 7 and 5

3 0
3 years ago
QUESTION 1 Evaluate −30 ÷ −6. a 5 b −5 c 6 d −6 QUESTION 2 Evaluate 62 ÷ (3 + 9). a3 b4 c12 d21 QUESTION 3 Danny made a mistake
Mashcka [7]

Answer:

A; ?; Line 3

Step-by-step explanation:

Question 1:

-30 divided by -6 is 5.

The negatives cancel each other out.

And 30 divided by 6 is simply 5.

Question 2:

62\div(3+9)

Do the operation inside the parenthesis first:

62\div12

Divide. 12 does not go into 62 evenly. 12 times 5 is 60, so the answer is 5 remainder 2:

62\div12=5\text { R}2

Or in fractions:

31/6

(Was there a typo? From what you've given me, the correct answer is not listed.)

Question 3:

So we have to following steps:

\text{Line 1: } 21+35\div7+6(2)\\\text{Line 2: }21+5+6(2)\\\text{Line 3: }21+11(2)\\\text{Line 4: }21+22\\\text{Line 5: }43

The mistake is in Line 3. Danny cannot just combine 5+6(2) into 11(2). Instead, he should multiply 6(2) and then add. Thus, the correct solution is:

\text{Line 1: } 21+35\div7+6(2)\\\text{Line 2: }21+5+6(2)\\\text{Line 3: }21+5+12\\\text{Line 4: }26+12\\\text{Line 5: }38

3 0
3 years ago
Using Cramer's Rule, what is the value of x in the system of linear equations below?
Luden [163]

Answer:

0

Step-by-step explanation:

We find the determinant of a matrix by the method below. If we have a matrix:

\left[\begin{array}{cc}a&b\\c&d\end{array}\right]

The determinant is ad-bc

Now, using cramer's rule, we find x-value by the formula:

x=\frac{D_x}{D}

Where D is the determinant of the original problem and D_x is the determinant of the x-value matrix. How do we get those?

<u><em>To get original matrix and thus D, we set up the matrix as the coefficients of x and y (s) of both the equations and to get matrix of x-value and thus D_x, we replace the x values of the matrix with the numbers in the right hand side of the 2 equations.</em></u> We show this below:

<em />

<em>To get D:</em>

\left[\begin{array}{cc}3&4\\1&-6\end{array}\right] \\D=(3)(-6)-(1)(4)=-18-4=-22

<em>To get D_x:</em>

<em>\left[\begin{array}{cc}12&4\\-18&-6\end{array}\right] \\D_x=(12)(-6)-(-18)(4)=0</em>

<em />

<em>Putting into the formula, we get:</em>

<em>x=\frac{D_x}{D}=\frac{0}{-22}=0</em>

<em />

<em>Thus, the value of x is 0</em>

5 0
3 years ago
Lucy is training for a long distance race. She runs 5/8 of a kilometre every day during her first week of training. How many kil
Vadim26 [7]

Answer:

here is the pic you wanted

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
The profit on the sale of a small bag of popcorn is $1, while the profit on the sale of a medium bag of popcorn is $2. The Glee
Maru [420]
Assume the graph is drawn with m as the x-axis, and s as the y-axis.  If it is drawn the other way, it would be just a reflection about the x=y line.
There are two unspecified but implicit conditions, namelym>=0 and s>=0, which correspond to the m- and s-axes (horiz. & vert.) when equality holds in either case.
s+m<100 is a solid line at 45 degrees intersecting the m- and s-axes at (0,100), and (100,0) respectively.
s+2m>100 is a solid line with slope -2 intersecting the axes at (0,50) and (100,0).
The feasible region (shaded) is between the two lines, but above the horizontal axis.
If the graph is drawn the other way, the feasible region is between the two lines, and to the right of the vertical axis.
6 0
3 years ago
Read 2 more answers
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