Answer:
3x + 5y = -2 is x=
−5
/3
y+
−2
/3
2x - y = 3 is x=
1
/2
y+
3
/2
Step-by-step explanation:
Answer:
Options (1), (2), (3) and (4)
Step-by-step explanation:
By applying the sine and cosine rules in the given triangle,
sinθ = ![\frac{\text{Opposite side}}{\text{Hypotenuse}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BOpposite%20side%7D%7D%7B%5Ctext%7BHypotenuse%7D%7D)
cosθ = ![\frac{\text{Adjacent side}}{\text{Hypotenuse}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BAdjacent%20side%7D%7D%7B%5Ctext%7BHypotenuse%7D%7D)
cos(30°) =
= ![\frac{11\sqrt{3} }{22}](https://tex.z-dn.net/?f=%5Cfrac%7B11%5Csqrt%7B3%7D%20%7D%7B22%7D)
= ![\frac{\sqrt{3}}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D)
sin(30°) = ![\frac{BC}{AB}](https://tex.z-dn.net/?f=%5Cfrac%7BBC%7D%7BAB%7D)
= ![\frac{11}{22}](https://tex.z-dn.net/?f=%5Cfrac%7B11%7D%7B22%7D)
= ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
cos(60°) = ![\frac{BC}{AB}](https://tex.z-dn.net/?f=%5Cfrac%7BBC%7D%7BAB%7D)
= ![\frac{11}{22}](https://tex.z-dn.net/?f=%5Cfrac%7B11%7D%7B22%7D)
= ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
sin(60°) = =
= ![\frac{11\sqrt{3} }{22}](https://tex.z-dn.net/?f=%5Cfrac%7B11%5Csqrt%7B3%7D%20%7D%7B22%7D)
= ![\frac{\sqrt{3}}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D)
Options (1), (2), (3) and (4) are the correct options.
1) The expressions are not equivalent. When you expand and multiply 2(x + 3) it becomes 2x + 6. This is not equal to 3x + 5
2) They are equivalent. Again, expand and multiply the second expression. 2(3n + 4) becomes 6n + 8. This makes both sides equal.
3) They are equivalent. In the parentheses, you are adding 3 y's and a 2. This gives you 3y + 2. Now add the additional 3y that follows the closed parentheses. You'll have 6y + 2. Now both sides are equivalent.
<em>Answer:</em>
<em>U10 = 19</em>
<em>Step-by-step explanation:</em>
<em>The sequence is </em>
<em />
<em>x is the coefficient to U.</em>
<em>So, </em>
<em />
<em>Which means </em>
<em />
<em>Which means </em>
<em />
<em>And there is your answer.</em>
<em>Hope this helps. Have a nice day.</em>
Answer:
There are closed addition.
Step-by-step explanation:
Closure (mathematics) ... For example, the positive integers are closed under addition, but not under subtraction: is not a positive integer even though both 1 and 2 are positive integers. Another example is the set containing only zero, which is closed under addition, subtraction and multiplication.
So, 0,2,5 are closed addition
Please mark me brainliest.