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Anestetic [448]
4 years ago
13

Find the area of a trapezium whose parallel sides are 25 cm ,13 cm and other sides are 15 cm and 15 cm

Mathematics
1 answer:
cupoosta [38]4 years ago
8 0
The answer is area= 285 cm
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Which term of the Ap: 3,8,13,18.......is 78?<br>​
Alex Ar [27]

Answer:

             \bold{a_{16}=78}

Step-by-step explanation:

a_1=3,\ a_2=3+5=8,\ a_3=8+5=13,\ a_4=13+5=18\ \implies\ d=5\\\\a_n=a_1+(n-1)d\\\\a_n=3+(n-1)(5)\\\\a_n=3+5n-5\\\\a_n=5n-2\\\\ a_n=78\quad\implies\quad n=\,??\\\\78=5n-2\\\\78+2=5n\\\\5n=80\\\\n=16

4 0
3 years ago
What’s the answer for 6x + 5 = 2x -15 ?
lakkis [162]

Answer:

x=-5

Step-by-step explanation:

7 0
3 years ago
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How do I simplify the following to "a+bi" form: (1+2i)^3
damaskus [11]

Answer:

Expand it.

(1+2i)^3 is equal to (1+2i)(1+2i)(1+2i).

Multiply everything out (being sure to multiply <em>every</em> term. (1+2i) * (1+2i) = 1+2i+2i+4i^2.

i is the square root of negative one, so i^2 is just -1. 1+2i+2i-4 is what you get from the first two, so now simplify that:

1-4 + 2i+2i = (-3+4i) and now multiply that by (1+2i):

(-3+4i) * (1+2i) = -3 - 6i +4i +8i^2.

Simplify again, and the answer is: -11-2i

Step-by-step explanation:

I hope this helps - really my only tip is don't spend time thinking about what i is, that just hurts your brain. Just remember that i^2 is equal to negative one, and treat it like regular multiplication and you will be fine.

7 0
2 years ago
9 divided by 234 <br> Breakdown
Hunter-Best [27]

Answer:

0.0384615385

Step-by-step explanation:

look at picture

7 0
4 years ago
Keith and Michelle went out to dinner. The total cost of the meal, including the tip, came to $53.70. If the combined tip came o
Bond [772]
53.70 - 9.60 = 44.10.  44.10 / 2 = 22.05.  Each friend paid (not including the tip) $22.05. 
3 0
3 years ago
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