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3 years ago

I don’t get number 7

Mathematics

2 answers:

pogonyaev3 years ago

7 0

Answer:

Correct answer is C 0.86

Step-by-step explanation:

The best way to do this kind of problem with decimals is to make it into a problem that is close to 100.

$\frac{43}{50}$ , but that may be difficult without a calculator to find the decimal of 43/50.

If you multiply 43/50 by 2, you would get $\frac{86}{100}$ which can also be written as $0.86$

VikaD [51]3 years ago

5 0

C because 43 divided by 50 is 0.86

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Given f(2) = 12, which of the following could be an equation of the function?

Viktor [21]

The equation of the function would be:
B. f(x)=4x+4, because if x=2, and if the answer is 12, 12 divided by 2 is 6, so f=6 4 multiplied by 2 is 8 added by 4 is 12. The equation in numbers would be 6(2)=12 or 6(2)=4(2)+4 which ends up being 12=12.

4 0

3 years ago

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Need help FAST!

trapecia [35]

Karla can only rent the hall for a maximum of 4.4 hours with $300.

<h3>Inequality</h3>

Inequality is an expression used to show the non equal comparison of numbers and variables.

Let y represent the total fee for renting the hall for x hours.

They charge a fixed fee of $200 plus an hourly fee of $22.50. Hence:

y = 22.5x + 200

Karla has $300, hence:

22.5x + 200 ≤ 300

x ≤ 4.4 hours

Karla can only rent the hall for a maximum of 4.4 hours with $300.

Find out more on Inequality at: brainly.com/question/22354790

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2 years ago

Evaluate the sum of the following finite geometric series.

rjkz [21]

Answer:

$\large\boxed{\dfrac{156}{125}\approx1.2}$

Step-by-step explanation:

<h3>Method 1:</h3>

$\sum\limits_{n=1}^4\left(\dfrac{1}{5}\right)^{n-1}\\\\for\ n=1\\\\\left(\dfrac{1}{5}\right)^{1-1}=\left(\dfrac{1}{5}\right)^0=1\\\\for\ n=2\\\\\left(\dfrac{1}{5}\right)^{2-1}=\left(\dfrac{1}{5}\right)^1=\dfrac{1}{5}\\\\for\ n=3\\\\\left(\dfrac{1}{5}\right)^{3-1}=\left(\dfrac{1}{5}\right)^2=\dfrac{1}{25}\\\\for\ n=4\\\\\left(\dfrac{1}{5}\right)^{4-1}=\left(\dfrac{1}{5}\right)^3=\dfrac{1}{125}$

$\sum\limits_{n=1}^4\left(\dfrac{1}{5}\right)^{n-1}=1+\dfrac{1}{5}+\dfrac{1}{25}+\dfrac{1}{125}=\dfrac{125}{125}+\dfrac{25}{125}+\dfrac{5}{125}+\dfrac{1}{125}=\dfrac{156}{125}$

<h3>Method 2:</h3>

$\sum\limits_{n=1}^4\left(\dfrac{1}{5}\right)^{n-1}\to a_n=\left(\dfrac{1}{5}\right)^{n-1}\\\\\text{The formula of a sum of terms of a geometric series:}\\\\S_n=a_1\cdot\dfrac{1-r^n}{1-r}\\\\r-\text{common ratio}\to r=\dfrac{a_{n+1}}{a_n}\\\\a_{n+1}=\left(\dfrac{1}{5}\right)^{n+1-1}=\left(\dfrac{1}{5}\right)^n\\\\r=\dfrac{\left(\frac{1}{5}\right)^n}{\left(\frac{1}{5}\right)^{n-1}}\qquad\text{use}\ \dfrac{a^n}{a^m}=a^{n-m}\\\\r=\left(\dfrac{1}{5}\right)^{n-(n-1)}=\left(\dfrac{1}{5}\right)^{n-n+1}=\left(\dfrac{1}{5}\right)^1=\dfrac{1}{5}$

$a_1=\left(\dfrac{1}{5}\right)^{1-1}=\left(\dfrac{1}{5}\right)^0=1$

$\text{Substitute}\ a_1=1,\ n=4,\ r=\dfrac{1}{5}:\\\\S_4=1\cdot\dfrac{1-\left(\frac{1}{5}\right)^4}{1-\frac{1}{5}}=\dfrac{1-\frac{1}{625}}{\frac{4}{5}}=\dfrac{624}{625}\cdot\dfrac{5}{4}=\dfrac{156}{125}$

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3 years ago

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faltersainse [42]

100 divided by 15.5 = 0.155

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4 years ago

Sam rotated parallelogram ABCD 90° clockwise around the origin. If angle A is 130° and angle B is 50°, what is the degree measur

fomenos

The degree measurement of angle A is already equal to 50 degrees.

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3 years ago

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