All categories

3 years ago

Q2. (a) Solve f+ 2f + f = 20

Mathematics

2 answers:

Alona [7]3 years ago

6 0

F + 2f + f = 20
4f = 20
Divide both sides of the equation by 4
f = 5

PSYCHO15rus [73]3 years ago

5 0

Step-by-step explanation:

apskaičiuoti trikampių perimetrą?

You might be interested in

Jacob is showing his steps to solve the expression −27.8 ÷ 1 over 7.

salantis [7]

There is no error, Jacob did everything right :)

8 0

3 years ago

Read 2 more answers

A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the

Rasek [7]

Answer:

$\mu_{p} = p = 0.06$

And the standard error is given by:

$SE_{p} = \sqrt{\frac{\hat p(1-\hat p)}{n}}$

And replacing we got:

$SE_[p]= \sqrt{\frac{0.06*(1-0.06)}{373}}= 0.0123$

And we want to find this probability:

$P(\hat p < 0.03)$

We can calculate the z score for this case and we got:

$z = \frac{\hat p -\mu_p}{\Se_p} = \frac{0.03-0.06}{0.0123}= -2.440$

And using the normal distribution table or excel we got:

$P(\hat p < 0.03)= P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

For this case we can find the mean and standard error for the sample proportion with these formulas:

$\mu_{p} = p = 0.06$

And the standard error is given by:

$SE_{p} = \sqrt{\frac{\hat p(1-\hat p)}{n}}$

And replacing we got:

$SE_[p]= \sqrt{\frac{0.06*(1-0.06)}{373}}= 0.0123$

And we want to find this probability:

$P(\hat p < 0.03)$

We can calculate the z score for this case and we got:

$z = \frac{\hat p -\mu_p}{\SE_p} = \frac{0.03-0.06}{0.0123}= -2.440$

And using the normal distribution table or excel we got:

$P(\hat p < 0.03)= P(Z$

8 0

4 years ago

The length of a rectangular tabletop is 18 inches more than the width. The perimeter is 244. What is the width of the tabletop?

Colt1911 [192]

Answer:

52 in.

Step-by-step explanation:

Let the width = x.

The length is x + 18.

perimeter = 2(L + W)

244 = 2(x + x + 18)

122 = 2x + 18

2x = 104

x = 52

The width is 52 in.

5 0

3 years ago

Read 2 more answers

Cold Boarders offers snowboard rentals for $5 per trip and an initial fee of

weqwewe [10]

Answer:

The prices will match up at 3 snowboard rental trips. The cost is $25.

Step-by-step explanation:

First, I wrote out the two equations:

Cold Boarders: 5x + 10

Ice Riders: 4x + 13

Next, I kept trying numbers for x until I found one that worked. The two companies prices match up at 3 snowboard rental trips. The cost will be $25. Hope this helped!

4 0

3 years ago

What is the area of the polygon given below?

egoroff_w [7]

Answer:

186

Step-by-step explanation:

Cut it 6+7+11=24×5=120

6+11=66

120+66=186

7 0

3 years ago

Read 2 more answers