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2 years ago

Eight less than the product of two and a number x xx.

Mathematics

2 answers:

avanturin [10]2 years ago

6 0

2x -8 that’s how u write it in an expression

sergeinik [125]2 years ago

3 0

Answer:

Hi!

The correct answer is 2x - 8.

Step-by-step explanation:

To construct the expression is convenient to do it by parts.

First: Eight less than a number x is: x - 8.

For example if x = 10, eight less than 10 is 2. 10 - 8 = 2.

Second: The product of two and a number x is: 2x.

For example if x = 10, the product of two and 10 is 20. 2*10 = 20.

Third: Eight less than the product of two and a number x: 2x - 8

For example if x = 10, eight less than the product of two and 10. 2*10 - 8 = 12.

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stealth61 [152]

Answer:

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Step-by-step explanation:

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8 0

3 years ago

Read 2 more answers

The antibiotic clarithromycin is eliminated from the body according to the formula A(t) = 500e−0.1386t, where A is the amount re

PolarNik [594]

Answer:

Time(t) = 11.61 hours (Rounded to two decimal place)

Step-by-step explanation:

Given: The antibiotic clarithromycin is eliminated from the body according to the formula:

$A(t) = 500e^{-0.1386t}$ ......[1]

where;

A - Amount remaining in the body(in milligram)

t - time in hours after the drug reaches peak concentration.

Given: Amount of drug in the body is reduced to 100 milligrams.

then,

Substitute the value of A = 100 milligrams in [1] we get;

$100= 500e^{-0.1386t}$

Divide both sides by 500 we get;

$\frac{100}{500}=\frac{ 500e^{-0.1386t}}{500}$

Simplify:

$\frac{1}{5} = e^{-0.1386t}$

Taking logarithm both sides with base e, then we have;

$\log_e (\frac{1}{5})= \log_e (e^{-0.1386t})$

$\log_e (\frac{1}{5})=-0.1386t$ [ Using $\log_e e^a =a$ ]

$\log_e (0.2)=-0.1386t$

$-1.6094379124341 = -0.1386t$

[using value of $\log_e (0.2) = -1.6094379124341$ ]

then;

$t = \frac{-1.6094379124341}{-0.1386}$

Simplify:

t ≈11.61 hours.

Therefore, the time 11.61 hours(Rounded two decimal place) will pass before the amount of drug in the body is reduced to 100 milligrams

6 0

2 years ago

Which statement shows that 6.24 is a rational number?

sp2606 [1]

Answer:

Step-by-step explanation:

8/33 = 0.24242424 ...

so 6.24 repeating = 6 8/33 which is rational. It can be represented by

206/33 which is a fraction and hence rational

7 0

2 years ago

Quadrilateral ABCD is given, the interior angle at vertex B is 97 degrees and the exterior angle at vertex A is 88 degrees. Line

Citrus2011 [14]

Answer:

angle 1 = 83°

angle 2 = 88°

Step-by-step explanation:

angle 1 and angle on vertex B are

pair of co interior angles ( whose sum = 180° )

so, angle 1 + angle B = 180°

angle 1 = 180° - angle B

angle 1 = 180° - 97° = 83°

hence, angle 1 = 83°

but, angle 2 and exterior of vertex A forms alternate interior angle pair ,

so , angle 2 = angle A = 88°

i hope you got it ....

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3 years ago

Which of the following is an example of a matched pairs design? A. A teacher calculates the average scores of students on a pair

Mashutka [201]

Answer:

B. A teacher compares the pre-test and post-test scores of students

Step-by-step explanation:

the answer is true, because it is a good example to compare the tests between students, we know that a matching pair design is a random model and is used when the experiment allows grouping subjects in pairs based on a variable and each pair will receive randomly a different handling, the answer A is not true because in the example all students are uniformly averaged and the variable is not correlated with subgroups, option c is incorrect because the variable was not randomized and generates classification bias and the option d is incorrect because the teacher compares a small sample as her class with a score of a total sample, but does not intervene on her students when selecting the corresponding group

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3 years ago