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2 years ago

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:

No

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:

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?

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. We show this below:

To get D:

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

To get $D_x$ :

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

Putting into the formula, we get:

$x=\frac{D_x}{D}=\frac{0}{-22}=0$

Thus, the value of x is 0

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:

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2 years ago

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Maru [420]

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s+m<100 is a solid line at 45 degrees intersecting the m- and s-axes at (0,100), and (100,0) respectively.
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6 0

3 years ago

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