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jenyasd209 [6]
3 years ago
11

In the diagram below, determine the value of $x$: [asy] size(6.5cm); pair cis(real magni, real argu) { return (magni*cos(argu*pi

/180),magni*sin(argu*pi/180)); } draw(cis(1.5,15)--cis(-1,15)--cis(-1,15)+cis(2.5,-15)); draw(cis(-1,60)--cis(1,60)--cis(1,60)+cis(2.2,-75)); label("$30^\circ$",cis(-1,15)+(0.2,0),E); label("$45^\circ$",cis(1,60)+(-0.05,-0.2),S); label("$130^\circ$",(-0.03,0.03),SE); label("$x^\circ$",(0.8,-0.64)); [/asy]
Mathematics
1 answer:
Inessa05 [86]3 years ago
6 0

Answer:

55 degrees

I answered the question on AoPS and it said it was correct.

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What is the surface area of the pyramid?
mihalych1998 [28]

Answer:

39

Step-by-step explanation:

square= lw

triangle= 1/2lw

s=9

triangle=15 divided by 2 times 4=30

you add 30 + 9 which will give you 39

3 0
3 years ago
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Saving?
nikitadnepr [17]

Answer:

A man borrows * 8000

He agrees to repay with a total interest of 1360 in 12 monthly instalments.

Each instalment being less than the preceding one by * 40

                                                                      =  \frac{12}{1360} x 40

                                                                      = 12 x 34

                                                                      = 408 (Ans)

                                                             

7 0
3 years ago
Solve the right triangle, ΔABC, for all the missing side and angles to the nearest tenth given sides a = 10.6 and b = 19.2.
Aliun [14]

Answer:

Part 1) c=21.9\ units

Part 2) B=61.1\°

Part 3) A=28.9\°

Part 4) C=90\°

Step-by-step explanation:

step 1

Find the length side c

Applying the Pythagoras Theorem

c^{2}=a^{2}+b^{2}

substitute the given values

c^{2}=10.6^{2}+19.2^{2}

c^{2}=481

c=21.9\ units

step 2

Fin the measure of angle B

we know that

In the right triangle

tan(B)=b/a

substitute the given values

tan(B)=19.2/10.6

B=arctan(19.2/10.6)=61.1\°

step 3

Find the measure of angle A

we know that

The measure of interior angles in a triangle must be equal to 180 degrees

so

∠A+∠B+∠C=180°

Remember that in a right triangle the measure of angle C is 90 degrees

we have

B=61.1\°

C=90\°

substitute

A+61.1\°+90\°=180\°

A=28.9\°

4 0
3 years ago
The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0degrees°C at the fr
Sergio039 [100]

Answer:

Step-by-step explanation:

Hello!

The variable of study is X: Temperature measured by a thermometer (ºC)

This variable has a distribution approximately normal with mean μ= 0ºC and standard deviation σ= 1.00ºC

To determine the value of X that separates the bottom 4% of the distribution from the top 96% you have to work using the standard normal distribution:

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(z*σ)+μ = X

X= (-1.75-0)/1= -1.75ºC

The value that separates the bottom 4% is -1.75ºC

I hope this helps!

5 0
3 years ago
Convert 9 over 16 to a decimal.<br> A. 0.4225<br> B. 0.5225<br> C. 0.5625 <br> D. 0.7455
Brums [2.3K]
C. 0.5625...you find the answer by dividing 6 by 19 :)
7 0
3 years ago
Read 2 more answers
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