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Aleks04 [339]
3 years ago
8

I need help, this problem is screwing me over

Mathematics
1 answer:
VMariaS [17]3 years ago
4 0

Answer:

  C.  40.5 cm²

Step-by-step explanation:

Use the formula for the area of a trapezoid:

  A = (1/2)(b1 +b2)h

The bases are the parallel sides, 4.5 cm and 9 cm. The height is the perpendicular distance between them, 6 cm. Filling in these numbers, we have ...

  A = (1/2)(4.5 +9)(6) = 40.5 . . . cm²

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If a → b is true, then ~a → b is also true.
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Answer:

False

Step-by-step explanation:

To determine whether the statemaent "If a\Rightarrow b is true, then \neg a\Rightarrow b is also true" holds, you can form the truth table:

\begin{array}{ccccc}a&b&a\Rightarrow b&\neg a&\neg a\Rightarrow b\\1&1&1&0&1\\1&0&0&0&1\\0&1&1&1&1\\0&0&1&1&0\end{array}

When the result of the column a\Rightarrow b takes value 1 (true), the result of the column  \neg a\Rightarrow b is not always 1, then the statement is false.

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Which is a counterexample that disproves the conjecture? After completing several multiplication problems, a student concludes t
Dahasolnce [82]
When you make the product of a binomial of the kind x + a times other binomial that is of the kind x - a, you obtain another binomial (not a trinomial), so any example with that form will be a counterexample that disproves the conjecture:

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For example, (x +3) * (x - 3) = x^2 - 9. So, not always the product of two binomials is a trinomial.
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3 years ago
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SO THE FIRST ANSWER IS 540 FEET AND THE SECOND ANSWER IS  YEA U CAN

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3 years ago
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Theorem: The segment joining the midpoints of two sides of a triangle is parallel to the third side and half its length.
Taya2010 [7]

Answer:

Segment DE is half the length of segment AC. -- Substitution property of equality

Step-by-step explanation:

Here is given a proof for proving line joining mid segment is parallel and half the length of third side.

Stepwise proof is given in two columns

We find that for every line there is a justification as

STatement                                        Justification

D and E coordinates found out       MId point formula

DE and BC are measured                Distance formula

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This justification was missing in the given proof and with this included proof would be complete

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3 years ago
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