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3 years ago

The equations y = 1/9x relates proportional quantities x and y. what is the value of x when y is 4?

Mathematics

1 answer:

weeeeeb [17]3 years ago

6 0

X = 36

being that you simplify both sides of the equation and solate the variable

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klio [65]

Answer: $1000 = $850 $5000 = $4250 $5020 = $4267

Step-by-step explanation: I have a depreciation calculator

6 0

3 years ago

I will mark you brainlist!

Angelina_Jolie [31]

If you cut them into equal parts they will be 12.5 inches each piece.

7 0

3 years ago

Write 42 and 63 as products of their prime factors

Maslowich

$42|2\\21|3\\.\ 7|7\\.\ 1|\\\\42=2\times3\times7\\\\63|3\\21|3\\.\ 7|7\\.\ 1|\\\\63=3\times3\times7$

3 0

3 years ago

a teacher has given a test to a group of students. the set of scores is: 78, 79, 79, 81, and 83. find the variance for this samp

Delvig [45]

Based on the data set, the variance for this sample of tests is 4

<h3>How to find the variance for this sample of tests?</h3>

The sample of test is given as:

78, 79, 79, 81, and 83.

Calculate the mean, using:

Mean = Sum/Count

So, we have

Mean = (78 + 79 + 79 + 81 + 83)/5

Evaluate

Mean = 80

The variance is calculated as

$\sigma^2 = \frac{\sum(x - \bar x)^2}{n-1}$

This gives

$\sigma^2$ = [(78 - 80)^2 + (79 - 80)^2 + (79- 80)^2 + (81- 80)^2 + (83- 80)^2)]/[5 - 1]

Evaluate the numerator and the denominator.

So, we have:

$\sigma^2$ =16/4

Evaluate the quotient

$\sigma^2$ = 4

Hence, the variance for this sample of tests is 4

Read more about variance at:

brainly.com/question/15858152

#SPJ1

7 0

2 years ago

Use logical equivalences (not a truth table) to reduce p → (q − p) to a tautology t. In other words, you should transform p → (q

schepotkina [342]

Answer:

The statement $p\rightarrow (q\rightarrow p)$ is a tautology.

$p\rightarrow (q\rightarrow p)\equiv \lnot p\lor (q\rightarrow p) \equiv \lnot p\lor (\lnot q\lor p) \equiv (p\lor \lnot p) \lor \lnot q \equiv T \lor \lnot q \equiv T$

Step-by-step explanation:

We have the following statement:

$p\rightarrow (q\rightarrow p)$

To reduce the statement to a tautology we need to use the table of logical equivalences as follows:

$p\rightarrow (q\rightarrow p)\equiv$

$\equiv \lnot p\lor (q\rightarrow p)$ by the the logical equivalence involving conditional statement.

$\equiv \lnot p\lor (\lnot q\lor p)$ by the the logical equivalence involving conditional statement.

$\equiv (p\lor \lnot p) \lor \lnot q$ by the Associative law.

$\equiv T \lor \lnot q$ by the Negation law.

$\equiv T$ by the Domination law.

7 0

3 years ago