All categories

2 years ago

Complete the table for the given rule. Rule: y= x - 5 X= ?,?,15 Y= 7,25,?

Mathematics

1 answer:

Elena-2011 [213]2 years ago

3 0

Answer:

x = 12, 30, 15

y = 7, 25, 10

Step-by-step explanation:

y = x - 5

When y = 7,

7 = x - 5

Add 5 to both sides

7 + 5 = x - 5 + 5

12 = x

When y = 25,

25 = x - 5

25 + 5 = x - 5 + 5

30 = x

When x = 15,

y = 15 - 5 = 10

You might be interested in

Abc and def are complementary angles what is the measure of x?

notka56 [123]

Complementary angles add to 90 degrees. This means that 65 + x = 90, so x = 90 - 65 = 25.

5 0

3 years ago

A pair of jeans cost $30. There is a 6% sales tax determine the total cost of the jeans

Roman55 [17]

6/100 • 30 = 1.8
1.8 + 30 = 31.8
Answer is $31.8

7 0

3 years ago

You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you beli

zhuklara [117]

Answer:

We need to sample at least 1069 parents.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many parents do you have to sample?

We need to sample at least n parents.

n is found when $M = 4, \sigma = 79.5$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$4 = 1.645*\frac{79.5}{\sqrt{n}}$

$4\sqrt{n} = 1.645*79.5$

$\sqrt{n} = \frac{1.645*79.5}{4}$

$(\sqrt{n})^{2} = (\frac{1.645*79.5}{4})^{2}$

$n = 1068.92$

Rounding up

We need to sample at least 1069 parents.

6 0

4 years ago

Read 2 more answers

Find the value of x pls help

4vir4ik [10]

Answer:

x = 15°

Step-by-step explanation:

First Identify the angle of x by subtracting 180° - 120° = 60°

Always remember when you see a straight line the line measures 180°

So the angle of x = 60° but not the value of x so use the given equation to find the value of x

3x + 15 = 60°

3x - 15 = -15°

3x = 45

x = 15°

7 0

3 years ago

Nora made 3 gallons of lemonade.

weqwewe [10]

Answer is b

Expiation

3 0

3 years ago

Read 2 more answers