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3 years ago

Please help don’t understand

Mathematics

1 answer:

sergejj [24]3 years ago

8 0

Answer:

x=35

Step-by-step explanation:

2x+15+2x-10+x=180

combine factors

5x+5=180

-5 from both sides

5x=175

divide 175/5x

x=35

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A random sample of 10 chocolate energy bars of a certain brand has, on average, 230 calories per bar, with a standard deviation

Troyanec [42]

Answer:

The confidence interval for the true mean calorie content is

$215$

Step-by-step explanation:

In this problem we know the mean and standard deviation fo the sample, so we can compute the CI like this:

$\bar{x}-t*s/\sqrt{n}< \mu$

We need to determine t for 10-1=9 degrees of freedom and 99% confidence level. We look up in the t-table and the value for t is 3.2498.

Then we can calculate the limits of the CI:

$\bar{x}-t*s/\sqrt{n}< \mu$

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4 years ago

What number makes the equation true? Enter the answer in the box<br> 16= X4

Assoli18 [71]

Answer: 4=X

Step-by-step explanation:

You divide 4x by itself, and divide 16 by 4x leaving you with X and 4 (I'm pretty sure)

3 0

3 years ago

Read 2 more answers

What is the ratio of 4 cm x 72 cm what is the ratio of 6 cm x 48 cm what is the ratio of 8 cm x 36 cm and what is the ratio of 2

My name is Ann [436]

4/72 = 1/18

6/48 = 1/8

8/36 = 2/9

2/144 = 1/72

6 0

3 years ago

How to do the problem

trapecia [35]

Step-by-step explanation:

$g(0.5) = 2 \\ \\ h(x) = g(x).f(x) \\ \therefore \: h(2) = g(2).f(2) \\ \therefore \: h(2) = 5 \times 2\\ \therefore \: h(2) = 10\\ \\ \\ j(x) = g(x) - f(x) \\ \therefore \: j(4) = g(4) - f(4) \\ \therefore \: j(4) = 9 - 8\\ \therefore \: j(4) = 1\\ \\ \\$

4 0

3 years ago

I don’t do really good with this kinda math

vesna_86 [32]

The formula for finding the area of a circle is A=pi(r^2). In this problem, you do 3.14 x 23^2.

3.14 x 23^2--->3.14 x 529--->1661.06 yards.

If you still don't understand and still need help, be free to ask me! Hope this helps!

6 0

4 years ago