MATHEMATICS COLLEGE

The difference of two times a number and three

Answers

Answer 1
Answer:

Answer:

2n - 3

Step-by-step explanation:

The difference of implies a subtraction between two terms.  Two times a number, implies some number being multiplied by two.  Hence, we can build the expression:

2n - 3

Where n represents the unknown number.

Cheers.

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Which is the solution to the system of equations?y = 1/8x - 1
-5x + 4y = -13
A. (0, -1)
B. (8,0)
C. (1, -7/8)
D. (2, -3/4)

Answers

Answer:

D. (2, -3/4)

Step-by-step explanation:

Using the substitution method:

-5x+4(1/8x-1)=-13

-5x+0.5x-4=-13

-4.5x/4.5=-9/4.5

-x=-2

x=2

You are supposed to replace 2 in the first equation now but as there is no other option with x value of 2 D is the answer.

If continued:

-5(2)+4y=-13

-10+4y=-13

4y=-3

y=-3/4

A woman leaves home and walks 3 mi. west, and then 4 mi. south. What is the magnitude of her displacement? Note: they are not asking you to add how far she went west and south. They are asking how far she is from home if she went directly back. Think of a triangle.

Answers

Answer:

  • 5 miles

Step-by-step explanation:

The route makes a right triangle with legs 3 mi and 4 mi, and the hypotenuse of x mi.

Use Pythagorean to find the distance:

  • x = √(3^2 + 4^2)
  • x = √(25)
  • x = 5 miles

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5. D - Vectors u and v are neither because the angle between the two vectors is not equal to 0 degrees, 90 degrees, or 180 degrees

6. C - approximately 4 mi. at a direction angle of 56 degrees northeast

7. A - approximately 174 mph at a direction angle of 58 degrees northeast

8. A - -200

9. D - W = 59 ft*lbs

10. C - u = 4/5i - 3/5j

From data gathered in the period 2008−2012, the yearly value of U.S. exports can be modeled by the function E(x) = −228x3 + 2,252.8x2 − 6,098.5x + 11,425.8 where x is the number of years after 2008 and E(x) is the value of exports in billions of dollars. The yearly value of U.S. imports can be modeled by the function I(x) = −400.4x3 + 3,954.4x2 − 11,128.8x + 17,749.6 where x is the number of years after 2008 and I(x) is the value of imports in billions of dollars. Estimate the total value the U.S. imported and exported in 2011. Round to the nearest whole number. About billion dollars were imported and exported by the U.S. in 2011.

Answers

Answer:you got this:)

Step-by-step explanation:

The number of people who caught a col is 8t-5t^2+t^3,. A9nd the number of people who recovered are t-t^2+1/5t^3. Write a polynomial for people who are still sick

Answers

well.. so many folks caught a cold
so many off that total, recovered,
keep in mind that, the folks who recovered
are just a fraction of the ones who were
sick

so... simply subtract the "recovered" polynomial,
from the "caugh cold" polynomial, namely
\begin{cases} 8t-5t^2+t^3\impliedby &\textit{caught a cold}\n \textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\textendash\n \cfrac{5-t^2+1}{5t^3}\impliedby &recovered \end{cases} \n \quad \n\ [8t-5t^2+t^3]-\left[ \cfrac{5-t^2+1}{5t^3} \right]\implies \textit{still sick}
The number of people who caught a col is 8t-5t^2+t^3,. A9nd the number of people who recovered are t-t^2+1/5t^3.

The hospital has a ratio of 8 nursing assistants to 1 mny, there are 6 nurses working. How many nursing assis
working today?

Answers

Two because it’s dhdj sus

A painter can finish painting a house in 3 hour

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Answers

Answer:

cool

Step-by-step explanation:
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