answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Artist 52 [7]
2 years ago
15

What is the area of a trapezoid ABCD with bases AB and CD , if: AB=10cm, BC=DA=13cm, CD=20cm

Mathematics
1 answer:
aliya0001 [1]2 years ago
7 0

Step-by-step explanation:

to find height :

draw a height from A to CD

height = (13) 2 - 5) 2 = 12 Cm

area = 10+20 /2 X 12= 180 cm 2

You might be interested in
Question 9 (3 points)
Mila [183]

From the dot plot, we have that 90.91% of the students have 5 or more vowels in their first and last  names.

---------------------

The dot plot states that:

  • 2 students have 4 vowels in their first and last name.
  • 3 students have 5 vowels.
  • 8 students have 6 vowels.
  • 9 students have 7 vowels.

Then:

  • Total of 2 + 3 + 8 + 9 = 22 students.
  • 3 + 8 + 9 = 20 have or more vowels.

p = \frac{20}{22} \times 100\% = 90.91\%

90.91% of the students have 5 or more vowels in their first and last  names.

A similar problem is given at brainly.com/question/14354536

5 0
2 years ago
Which is the equivalent of 12.42 written in DMS form?
nika2105 [10]
12.42

12°+.42(60)

12°25.2'

12°25'+.2(60)

12°25'12"
3 0
2 years ago
Read 2 more answers
Using the GCF you found in Part B, rewrite 35 + 63 as two factors. One factor is the GCF and the other is the sum of two numbers
nikklg [1K]
__7_|_35+63_
_____|__9+5__
35+63=7(9+5)=7<span>14=98 or 35+63=98</span>
3 0
2 years ago
Using Normal Distribution to Analyze Data Martin suspects that people carry less cash with them than they used to because of cre
jek_recluse [69]

Answer:

Step-by-step explanation:

Sample size = 95

X=cash carried by the persons

x bar = 8.00

s = sample std dev = 2.50

Std error = \frac{s}{\sqrt{n} } =\frac{2.5}{\sqrt{95} } \\=0.2565

Hence Z score would be

\frac{x-8}{0.2565}

a) P(X

-0.00

b) P(9

c) 95% conf interval margin of error = ±1.96*0.2565

=±0.54782

Confi interval = (8-0.5027, 8+0.5027)

= (7.4923, 8.5027)

C)If conf level increases, then width of interval would increase since critical value would increase.

If sample size increases std error would decrease and hence margin of error.

So interval would decrease.

3 0
2 years ago
Factorise 125x^3 -27y^3
telo118 [61]

Answer:

(5x - 3y)(25x² +15xy + 9y²)

Step-by-step explanation:

125x³ - 27y³ is a difference of cubes and factors in general as

a³ - b³ = (a - b)(a² + ab + b²)

Given

125x³ - 27y³

= (5x)³ - (3y)³

= (5x - 3y)((5x)² + (5x)(3y) + (3y)²)

= (5x - 3y)(25x² + 15xy + 9y²)

6 0
2 years ago
Other questions:
  • While crossing the Atlantic, sailors spot two mermaids 120° apart on each end of an island that is 6 miles away. How far apart a
    7·1 answer
  • The floor area of a hall is 1044 m2. The length is 36 m. Give a quick estimate of width of the hall. ?
    15·1 answer
  • A cell phone company charges a monthly fee plus $0.25$0.25 for each text message. The monthly fee is $30.00$30.00 and you owe $5
    9·1 answer
  • A company produces precision 1 meter (1000 mm) rulers. the actual distribution of lengths of the rulers produced by this company
    9·1 answer
  • Gabriella swims 2 laps per minute. What is the unit rate?
    5·2 answers
  • An account with a $250 balance accrues 2% annually. If no deposits or withdrawals are made, which graph can be used to determine
    11·2 answers
  • the jellybean jar has a radius of 4.8 cm and a height of 11.8 cm. what would be a reasonable lower limit for the number of jelly
    7·1 answer
  • ) An cube of ice was melting in the Arizona sun. The Volume of the cube was decreasing at a rate of 42 cubic centimeters per min
    15·1 answer
  • Twenty percent of adults in a particular community have at least a​ bachelor's degree. Suppose x is a binomial random variable
    13·1 answer
  • When the movie is half over, popcorn sells for half price. Which expression can be used to determine the new cost for 3 orders o
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!