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ioda
3 years ago
14

How can you use 10% and 20% of an amount to find 15% of anl amount?

Mathematics
1 answer:
beks73 [17]3 years ago
3 0
You just need to know how much 10% is and then you just divided what 10% is and that will be equal to 5% and then you just add the 10 % and 5%
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From a survey of 100 people we found that 62 drink pepsi, 36 drink coke and 30 drink both. How many drink only Coke? How many dr
Wittaler [7]
The numbers aren't accurate, they dont add up
6 0
3 years ago
You and your friend are practicing for a rowing competition and want to know how far it is to an island in the Indian River Lago
zepelin [54]

The drawing is missing, so i have attached it.

Answer:

24 yards

Step-by-step explanation:

From the image, we can see that AB and DE are both adjacent sides of their respective triangles.

While, CE and BC are both opposite sides of their respective triangles

Now, from your side, x is the distance to the island.

So, from ratio of similar triangles, we can find x.

Thus;

8/x = 3/9

Cross multiply to get;

8 × 9 = 3x

3x = 72

x = 72/3

x = 24

Thus, distance from your side to the island is 24 yards

6 0
2 years ago
PLEASE HELP!!<br><br>Sin &lt;k=<br>A. 1/2<br>B. (sqrt3)/3<br>C. 2<br>D. 2sqrt3​
algol [13]

Answer:

1/2

Step-by-step explanation:

Sine is opposite over hyp.

So the opp is 5 and the hyp is 10

5/10 equal 1/2

4 0
2 years ago
Simplify completely x^2+4x-45 / x^2+10x+9
S_A_V [24]

Answer: x - 5/x + 1

Step-by-step explanation:

This algebraic fraction

The task to be performed here is factorisation and simplification. Now going by the question,

x² + 4x - 45/x² + 10x + 9, the factorisation of

x² + 4x - 45 = x² + 9x - 5x - 45

= x(x + 9 ) - 5(x + 9 )

= ( x + 9 )(x - 5 ), don't forget this is the algebraic fraction's Numerator

The second part

x² + 10x + 9 = x² + x + 9x + 9

= x(x + 1) + 9( x + 1 )

= ( x + 9 )( x + 1 ), this is the algebraic denominator.

Now place the second expression which is the denominator under the first expression which is the numerator.

( x + 9 )( x - 5 )/( x + 9 )( x + 1 ).

You can see that, ( x + 9 )/( x + 9 ) divide each other , therefore therr then cancelled and left with

x - 5/x + 1

4 0
3 years ago
DUE MIDNIGHT PLEASE HELP &lt;33
marishachu [46]

Answer: slope=3 Y=1

Step-by-step explanation:

Step 1: Find two points (0,2) & (1,5)

Step2: Y2-Y1 over X2-X1

5-2.       3

——- =  ——

1-0.         1

(1,3)

3 0
2 years ago
Read 2 more answers
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