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WARRIOR [948]
3 years ago
5

What is x??? Please explain.

Mathematics
2 answers:
tresset_1 [31]3 years ago
7 0
X is 78 because vertical angles are congruent
kari74 [83]3 years ago
6 0

Answer:

78°

Step-by-step explanation:

when two lines intersect it creates 4 seperate angles, here it gives us 78°, and we know that the angle across from it is the same, so they equal.

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Step-by-step explanation:

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3 years ago
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How many kg of 30% salt solution by mass and 40% salt solution by mass should be mixed to form 200kg of 37% salt solution ?
allochka39001 [22]

Let us assume that x kg of 30% salt solution is mixed with (200-x) kg of 40% salt solution in order to obtain 200 kg of 37% salt solution.

We can set up a linear equation in terms of x by setting amount of total salt before mixing and after mixing equal to each other.

30\%\text{ of }x+40\%\text{ of }(200-x)=37\%\text{ of }200\\0.30x+0.40(200-x)=0.37(200)\\0.30x+80-0.40x=74\\0.10x=6\\x=60

Therefore, 60 kg of 30% salt solution should be mixed with 140 kg of 40% solution.

7 0
3 years ago
20-(+20)-(-65)-(-12)​
Karo-lina-s [1.5K]

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If Θ is in quadrant III and tanΘ >0, then x is negative. True or false.
shutvik [7]

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Step-by-step explanation:

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