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denis-greek [22]
3 years ago
15

(3x2 – 5x + 6) + (2x2 + 7x - 9)

Mathematics
1 answer:
tatuchka [14]3 years ago
6 0

Answer:

Step-by-step explanation:

3x^2 + 2x^2 - 5x + 7x + 6 - 9

5x^2 + 2x - 3

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slavikrds [6]

Answer:

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Step-by-step explanation:

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2 years ago
Find the area of the trapezoid.
ss7ja [257]

\bf \textit{area of a trapezoid}\\\\
A=\cfrac{h(a+b)}{2}~~
\begin{cases}
a,b=\stackrel{bases}{parallel~sides}\\
h=height\\[-0.5em]
\hrulefill\\
a=15.8\\
b=21.8\\
h=11.7
\end{cases}\implies A=\cfrac{11.7(15.8+21.8)}{2}
\\\\\\
A=\cfrac{11.7(37.6)}{2}\implies A=219.96

4 0
3 years ago
Read 2 more answers
How do i Evaluate In 7. ?
Pachacha [2.7K]

Answer:

  (b)  1.95

Step-by-step explanation:

One of the easiest ways to evaluate an arithmetic expression of almost any kind is to type it into an on-line calculator. Many times, typing it into a search box is equivalent.

<h3>Application</h3>

See the attachment for the search box input (at top) and the result. This calculator has the benefit that it <em>always follows the Order of Operations</em> when evaluating an expression. (Not all calculators do.)

  ln(7) ≈ 1.95

__

<em>Additional comment</em>

If your math course is asking you to evaluate such expressions, you have probably been provided a calculator to use, or given the requirements for a calculator suitable for use in the course.

There are some very nice calculator apps for phone and tablet. Many phones and tablets already come with built-in calculator apps. For the purpose here, you need a "scientific" or "graphing" calculator. A 4-function calculator will not do.

As with any tool, it is always a good idea to read the manual for your calculator and work through any example problems.

__

Years ago, handheld calculators were not available, and most desktop calculators were only capable of the basic four arithmetic functions. Finding a logarithm required use of a table of logarithms. Such tables were published in mathematical handbooks, and extracts of those often appeared as appendices in math textbooks used in school.

3 0
2 years ago
Maureen used 0.9 meters of fabric to make a pillow. How many more pillows of this size can Maureen make with 12.75 meters of add
Basile [38]

Answer:

14

Step-by-step explanation:

12.75m/0.9m = 14

4 0
3 years ago
Solve the system of equations <br><br> y=2x+1<br> y=x^2+2x-8
Lemur [1.5K]

Answer:

(3,7) and (-3,-5)

Step-by-step explanation:

To solve the system of equations, graph both functions. The (x,y) point(s) where the functions intersect is the solution(s).

See attached picture.

7 0
3 years ago
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