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Aleks04 [339]
4 years ago
8

I need help, this problem is screwing me over

Mathematics
1 answer:
VMariaS [17]4 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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Can someone please help with these 2 questions? It would mean the world to me. I have attached the image for the questions.
sweet [91]

Answer:

2 \frac{1}{20}

Step-by-step explanation:

for question a)

It would be easier if you converted these to improper fractions (currently it is in the form of a proper fraction)

to convert to improper fraction, you would multiply the denominator (bottom no. of fraction) by the whole number , then add that with the numerator (top no. of fraction) and put the whole thing over the denominator.

E.g.

7 \frac{1}{4} = 7x4 + 1 = 29

Thus, improper fraction would be \frac{29}{4}

do same thing  for other one

thus , \frac{26}{5}

now,

\frac{29}{4} - \frac{26}{5}

however, you can't do this as the denominators are not the same, so multiply them by a number which would give the a common denominator (20 would be the best option for common denominator)

\frac{145}{20} -\frac{104}{20} = \frac{41}{20}

convert back to mixed number

2 \frac{1}{20}

5 0
3 years ago
Read 2 more answers
Somebody answer plz and thanks if u do
Katarina [22]

Answer:

y=-3, x=3

Step-by-step explanation:

step by step in picture

everything you asked for is in the picture

4 0
3 years ago
Solve 7x – 9 = 28 + 4(x – 1).
lidiya [134]
7x - 9 = 28 + 4x - 4
7x - 4x = 28 - 4 + 9
3x = 33
x = 11
7 0
3 years ago
What is the factored form of the expression? t2 – 81
blondinia [14]
We have that
t²<span> – 81
</span>
we know that
A difference of two perfect squares, <span> (A</span>²<span> - B</span>²)<span>  </span><span>can be factored into </span><span> (A+B) • (A-B)
</span> let
A²-------> t²
B²-------> 9²
then
(t² – 9²)------->(t+9)*(t-9)

the answer is
(t+9)*(t-9)


6 0
4 years ago
Pls help need it done pls
Harman [31]

Answer:

1/4 +m = 2/3

Step-by-step explanation:

3 0
3 years ago
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