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elixir [45]
2 years ago
13

Anyone who’s good at trigonometry?

Mathematics
2 answers:
romanna [79]2 years ago
4 0

Answer:

Step-by-step explanation:

u know the sinus theorem for the area of a triangle

u can search it sinus theorem triangle

for the solution:

12.4/sin(74)=y/sin(39)

y=7.85 cm

Musya8 [376]2 years ago
3 0

Answer:

Length y is 8.12cm

Step-by-step explanation:

Use the law of sines.

\frac{sin(a)}{A} =\frac{sin(b)}{B} ⇒\frac{sin(39)}{y} =\frac{sin(74)}{12.4}

y(\frac{sin(39)}{y}) =y(\frac{sin(74)}{12.4})

sin(39)=y(\frac{sin(74)}{12.4})

y=\frac{sin(39)}{sin(74)/12.4}

y=\frac{12.4*sin(39)}{sin(74)}

y=8.118052433 if you don't round.

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A positive integer squared plus 3 times it’s consecutive integer is equal to 43
Eduardwww [97]

Answer:

the integer is 5

Step-by-step explanation:

x^2+3(x+1)=43

x^2+3x+3=43

x^2+3x+(9/4)=43-3+(9/4)

(x+(3/2))^2=42 1/4

x+(3/2)=sqrt(42 1/4)

x+(3/2)=6 1/2

x=(6 1/2)-(3/2)

x=5

check:

5^2+3(6)=43

25+18=43

43=43

3 0
2 years ago
Read 2 more answers
3 2/7 fraction that have the same value
zimovet [89]
46/14. Hoped this helped!
7 0
3 years ago
If a+1/a = 5, find the value of a² +1/a²​
Orlov [11]

a - 1/a =5

take squaring both side

(a - 1/a )^2 = (5)^2

a^2 +1/a^2 -2.a.1/a =25

a^2+1/a^2 -2 =25

a^2+1/a^2 =27 (answer)

6 0
3 years ago
Read 2 more answers
Which of the following inequalities matches the graph?<br> x&lt;2<br> y &gt; 2<br> y&lt;2<br> X&gt;2
Deffense [45]

Answer:

X<2

I think is that never the less could be wrong

5 0
3 years ago
Y=6x – 11<br> -2x – 3y =-7
Eva8 [605]

Answer:

x=2   and   y=1

Step-by-step explanation:

1). Plug the y value into the second equation. It will look like the following afte you plug in what y equals:

              -2x-3(6x-11)=-7

2). Then, you distribute the "-3" to all the terms inside the parenthesis.

              -2x-18x+33=7

3). Then, you subtract the positive 33 from both sides to try to get the x alone on one side.

              -2x-18x=-40

4.) Then, you combine all of the terms containing an x.

              -20x=-40

5). Finally, you divide both sides by -20 and the outcome is x=2.

6).  Hold up...we ain't done yet..

7).  Next, you have to plug the x back into the either equation to get the outcome of what y will be, but for this purpose I will plug it back into the first equation.

              y=6(2)-11

8). I will then distribute the 6 into the all the terms in the parenthesis and then it will look like this.

              y= 12-11

9). Do the math...and the answer is y=1.

4 0
3 years ago
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