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Debora [2.8K]
3 years ago
13

What is 30 percent of 25

Mathematics
1 answer:
sweet [91]3 years ago
6 0
7.5 is 30 percent of 25 because

25 divided by 10 is 2.5 times 3 is 7.5
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What is the square root of 9​
taurus [48]
The square root of 9 is 3
3 0
3 years ago
Read 2 more answers
When i am solving for the sides of a right triangle when will i use trigonometric functions
AnnZ [28]

Answer:

The ratios of the sides of a right triangle are called trigonometric ratios. We need to use trigonometric functions to find them when we don't have any angle other than 90 degree shown.

Three common trigonometric ratios are the sine (sin), cosine (cos), and tangent (tan). These are defined for acute angle.

However when we have one angle given with the 90 degree we can deduct without trigonometry but we would use all angles to find the hypotenuse or all angles to find the side of a right angle.

Alternatively, we cna do this with one given angle but if we have one, we might as well work out the other one without trigonometry and do a division with Sin = 25 (sin 35) sin 90  / sin 55

is one example when given the base 25ft that would find the hypotenuse or the length of elevation for buildings looking down or zip-wire questions.

Step-by-step explanation:

       A

       |  \

       l     \

4cm|        \ 5cm

       |          \

       |            \

   B | -  -  -  -  \ C      

          3cm

Suppose we wanted to find sin( A) in△ABC    

(The height of the wall in elevation questions would be used above the base shown 3cm at the start) Sin = 3 (sin 35)° sin 90°  / sin 55° to find the height side (4).

Sine is defined as the ratio of the opposite to the hypotenuse

sin(A) =  hypotenuse          ​= AB/BC        = 3/5

             / opposite

                                           

​

​

6 0
3 years ago
Solve the system using elimination
antoniya [11.8K]
Eliminate x's
multiply 2nd equation by -2 ad add to first

2x+3y=9
<u>-2x-10y=-16 +</u>
0x-7y=-7

-7y=-7
divide by -7
y=1

sub back

2x+3y=9
2x+3(1)=9
2x+3=9
minus 3
2x=6
divide 2
x=3


x=3
y=1

(x,y)
(3,1)

D
6 0
3 years ago
I will mark that person brainliest if they answer correctly and must be well explained
Zolol [24]

it is 180

hope this helps

6 0
3 years ago
Read 2 more answers
What is the following simplified product? Assume x≥0. 2√8x^3(3√10x^4-x√5x^2)
natta225 [31]

i think the answer is A.

5 0
3 years ago
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