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BARSIC [14]
3 years ago
11

What is 20% of the number 45

Mathematics
2 answers:
WINSTONCH [101]3 years ago
6 0

Answer:

9

Percentage Calculator: What is 20 percent of 45? = 9.

Step-by-step explanation:

Nezavi [6.7K]3 years ago
4 0

Answer:

The correct answer is 9

Step-by-step explanation:

math knowlegde

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D<x =8 18+6 is 24 and 24/3 is 8
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38 ×29 use rounding to estimate each product
nydimaria [60]
38 rounds to 40.
29 rounds to 30.
40 x 30 = 120.
8 0
3 years ago
In △ABC, AB = 13.2m,
luda_lava [24]

Answer:

(i) ∠ABH  = 14.5°

(ii) The length of AH = 4.6 m

Step-by-step explanation:

To solve the problem, we will follow the steps below;

(i)Finding  ∠ABH

first lets find <HBC

<BHC + <HBC + <BCH  = 180°  (Sum of interior angle in a polygon)

46° + <HBC  + 90 = 180°

 <HBC+ 136°  = 180°

subtract 136 from both-side of the equation

 <HBC+ 136° - 136°  = 180° -136°

 <HBC  = 44°

lets find <ABC

To do that, we need to first find <BAC

Using the sine rule

\frac{sin A}{a} =  \frac{sin C}{c}

A = ?

a=6.9

C=90

c=13.2

\frac{sin A}{6.9} = \frac{sin 90}{13.2}

sin A = 6.9 sin 90  /13.2

sinA = 0.522727

A = sin⁻¹ ( 0.522727)

A ≈ 31.5 °

<BAC  = 31.5°

<BAC + <ABC + <BCA = 180° (sum of interior angle of a triangle)

31.5° +<ABC + 90° = 180°

<ABC  + 121.5°  = 180°

subtract 121.5° from both-side of the equation

<ABC  + 121.5° - 121.5°  = 180° - 121.5°

<ABC = 58.5°

<ABH = <ABC - <HBC

           =58.5° - 44°

            =14.5°

∠ABH = 14.5°

(ii) Finding the length of AH

To find length AH, we need to first find ∠AHB

<AHB + <BHC = 180°  ( angle on a straight line)

<AHB + 46° = 180°

subtract 46° from both-side of the equation

<AHB + 46°- 46° = 180° - 46°

<AHB  = 134°

Using sine rule,

\frac{sin 134}{13.2}  = \frac{sin 14.5}{AH}

AH = 13.2 sin 14.5 / sin 134

AH≈4.6 m

length AH = 4.6 m

8 0
3 years ago
Which angle is vertical to ∠3?
djverab [1.8K]

Answer:

5

Step-by-step explanation:

*Just a highly recommended guess.*

4 0
2 years ago
Read 2 more answers
2 3/5 ÷ 2/7<br><br>9 1/10<br><br>26/35<br><br>6/35<br><br>4 1/10<br>choose one please
Step2247 [10]

Answer:

The answer is 91/10

Step-by-step explanation:

hope this helps

Solutions:

2 3/5÷2/7

13/5÷2/7

13/5×7/2

=13×7=91

=5×2=10

That's why the answer is 91/10

6 0
3 years ago
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