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3 years ago

Help please :)

Mathematics

2 answers:

Tanya [424]3 years ago

8 0

$59.225 You have to multiply 2369 with 25. That's how you gain your answer.

Marta_Voda [28]3 years ago

5 0

If you are given 25 gallons, then all u have to do is multiply 25 by 2.369
and the answer is $59.225

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The length of a rectangle exceeds its width by 5 inches, and the area is 14 square inches. What are the length and width of the

anzhelika [568]

Answer:

length= 7in

width= 2in

Step-by-step explanation:

7*2=14 which is the area

7-2= 5 which is the difference of inches between the length and width

6 0

3 years ago

How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the same type?

andre [41]

Answer:

Only one.

Step-by-step explanation:

Given that there are 25 cookie of the same type in a cookie jar.

We have to select 4 cookies from these 25.

Since they are all the same type, they are identical.

The question is

How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the same type?

There is no difference if we take any four cookies from these 25.

Hence no of different ways = 1

Only one is the answer.

6 0

4 years ago

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A chip used in the production of particleboard (Question 4) has a 15% chance of containing excessive bark. What is the probabili

salantis [7]

Answer:

0.2

Step-by-step explanation:

Given that:

P(particleboard with excessive bark) = 0.15

The P(that particleboard do not have excessive bark) = 1 - 0.15

i.e the population proportion number of success p = 0.85

The sample size (n) is given to be = 1000

To find the P(X ≥ 860)

Since the sample size is large, we will apply the normal approximation of binomial distribution to treat this question.

The population mean $\mu = n \times p$

$\mu = 1000 \times 0.85$

$\mu =850$

The population standard deviation $\sigma = \sqrt{n*p(1-p)$

$\sigma = \sqrt{1000*0.85*(1-0.85)}$

$\sigma = \sqrt{1000*0.85*(0.15)}$

$\sigma = \sqrt{127.5}$

$\sigma = 11.2916$

Let X be the random variable which obeys a normal distribution;

Then;

$P(X \ge 860) = P(Z\ge \dfrac{x- \mu}{\sigma})$

$P(X \ge 860) = P(Z\ge \dfrac{860- 850}{11.2916})$

$P(X \ge 860) = P(Z\ge \dfrac{10}{11.2916})$

P(X ≥ 860) = P(Z ≥ 0.8856)

P(X ≥ 860) = 1 - P(Z ≤ 0.8856)

From z table

P(X ≥ 860) = 1 - 0.8122

P(X ≥ 860) = 0.1878

P(X ≥ 860) $\simeq$ 0.2

Thus, the probability of having more than 860 bark-free chips in a batch of 1,000 = 0.2

6 0

3 years ago

the weight of the rectangle is 80 grams the weight of the triangle is double the weight of the circle determine the weight if th

andre [41]

20 grams
Triangle is half of rectangle therefore triangle is 40 grams
And since triangle is double the weight of the circle is half of 40 which is 20 grams

6 0

2 years ago

X - y = 3 x + 2y = -6 Giving out brainliest SHOW ALL OF YOUR WORK☺

taurus [48]

$x-y=3$
$x+2y=-6$

Subtract both equations to isolate and solve for y.

$(x-x)+(-y-2y)=3-(-6)$
$0+-3y=9$
$y=-3$

Now, solve for x in either equation by plugging in the y value.
I will choose the simpler first equation: $x-y=3$

$x+3=3$
$x=0 ; y=-3$

3 0

3 years ago

Read 2 more answers