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aleksley [76]
3 years ago
12

Can some one plz tell me the answer

Mathematics
2 answers:
VARVARA [1.3K]3 years ago
6 0
1/tan(42)*18=20
Hope it helps
koban [17]3 years ago
4 0

Answer:

Step-by-step explanation:

Step-by-step explanation:

Hello there!!

You can find it through simple way of ratio of sin or also by using cosine rule.

Lets do it simply as i can see your just 1st pic not second one so, i will answer you according to it.

so, here in question a Right angled triangle is given, with one angle 31° and one side 15 cm.

let's take sin angle as sin 31°.

so, p=h

h=15

We dont need base (b) here.

As we know that, thesin in ratio angle is

sin thita = p/h

or, sin 31°=h/15

or, 0.515038×15=h (using calculator sin 31°=0.515038.)

Therefore, the answer is 7.722557cm or 8cm.(as 7>5 and rounding off it we get 8).

Hope it helps...

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A scale drawing for an apartment shown below in the drawing is 2 cm represent 5m
rjkz [21]

Firstly, found out a square that is 7cm long and 5cm wide, you get the 7 from adding 5+2 across the top. Don't forget that, 2cm = 5m so you get the real area we need to work out how many meters are in each length.

So, firstly you know that in 1 cm there is 2.5m, with this information you can then do 7x2.5 to get the distance across the top in meters. That gives you 17.5 megers for the top and 5x2.5 = 12.5m.

After finding that, you have to find the area of this square, so you do 17.5m x 12.5m = 218.75m^2 for the biggest square, that's the total area however we want the bedroom area.

Therefore we have to workout how much area is in the living room and take that away from the total amount. Since we found out how many meters are in the 5cm we can use that here again. 12.5m x 12.5m = 156.25m^2 with this we do 218.75m^2 - 156.25m^2 = 62.5m^2 is for the bedroom and small empty space. now we just need to find the small empty space.

To do that, we do 5-4 which leave us with 1 cm and we already know it's across length is 2, with the information provided and stated we know that it's 2.5m x 5m = 12.5m^2

Then finally we do 62.5m^2 - 12.5m^2 to get the bedroom area. <u>50m^2</u>

6 0
3 years ago
Find the value of x in the triangle below
Tom [10]

Answer:

6.76

Step-by-step explanation:

applying pythogorem theorem

a^2+b^2=c^2

5^2+b^2=13^2

25+b^2=169

b^2=169/25

b^2=6.76^2

b=6.76

3 0
3 years ago
Solve for x:<br> (x+4) = 7.(1 point)<br> 2<br> Ox=3<br> Ox=5<br> Ox=6<br> O x = 10
MArishka [77]

Answer:

A

Step-by-step explanation:

So we have the equation:

x+4=7

To solve for x, subtract 4 from both sides:

(x+4)-4=(7)-4

The left side cancels. Subtract on the right:

x=3

So, the value of x is 3.

And our answer is A.

And we're done!

5 0
3 years ago
How do you write this in scientific notation?<br> 52 thousandths
wlad13 [49]

52 thousandths = 0.052

Move two decimal places to the right:

<h3><u>5.2 x 10⁻²   ⇒  the scientific notation</u></h3>
7 0
3 years ago
Read 2 more answers
What is y - 8 = -1/2 (x + 4) in standard form (8th grade math)
Natalija [7]
Y-8=-1/2x + (-2)
  +8               +8
y=-1/2x +6
I just used a 2 step equation for it. I first used Distributive Property. Then Subtracted 8 from each side
7 0
3 years ago
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