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Elza [17]
3 years ago
5

Help with these 3 please! BIG POINTS!

Mathematics
2 answers:
sesenic [268]3 years ago
8 0

Answer:

26. 14 sq.units

27. I think it's near to be 30

28. I think it is the first one

xeze [42]3 years ago
5 0

Answer:

use (pi*r^2)/2 to find the area of one semi circle, then multiply it by 2 to find the total of both semi circles

the diameter is 3, so the radius is 1.5

approx 7.06858347058

*2

=approx 14.1371669412

+6 (the rest of the blocks)

=20.1371669412

approx = 20.14 =20

\

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Simplify the following equation (2^3)^-2
koban [17]
Multiply the exponents
3 * -2 = -6
It would be 2^-6
Format: a^-b = 1/a^b
1/2^6 = 1/64
The solution is 1/64
6 0
2 years ago
I need some help. Thanks! ​
oee [108]

Simplified to its simplest form, your answer would be 20%. Since there are 30 students in total, and 6 of them are male sophomores, you would have 6/30. This can be simplified down to 2/10 and even further to 1/5. In decimals, this becomes 0.2, which as a percent becomes 20%.

4 0
3 years ago
Subtract. -8 - (- 2)
ddd [48]

Answer:

-6

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Four boxes were mailed and weighted at the post office and the first one is 8.25pounds the second one weights 8.200 and the he t
hoa [83]

Answer:

The first one would be the heaviest

Step-by-step explanation:

becuase if you compare all three of them vertically you wil see that the tenth in the first one is larger than the other two

5 0
3 years ago
Read 2 more answers
What are the solutions of the equation x4+3x2+2=0? use u substitution to solve
sweet [91]

Answer: x = ± i , x = ±√2i are solution .

Step-by-step explanation:

Given : x^{4} +3x^{2} +2=0, use u substitution to solve.

To find : what are the solutions of the equation .

Solution : We have given that x^{4} +3x^{2} +2=0.

Let consider x^{2} = u .

Substitute u =  x^{2} in given equation .

u^{2} + 3u +2=0.

On factoring

u^{2} + 2u+1u +2=0.

Taking common

u( u+2) +1 (u+2) = 0.

On grouping

(u+1) (u+2) =0

Now, u+1 = 0 ⇒ u = -1.

         u+2 = 0 ⇒ u = -2.

In term of x, plugging x^{2} = u.

x^{2} = -1   ;  x^{2} = -2.

taking square root both side

x = ± i

x = ±√2i.

Therefore, x = ± i , x = ±√2i are solution .

8 0
3 years ago
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