Answer:
x = 4 and y = 0
Step-by-step explanation:
Given expression:
-2x + 8y = -8
5x - 8y = 20
Now, to solve this problem by elimination, follow this procedure:
-2x + 8y = -8 --- i
5x - 8y = 20 --- ii
Coefficient of y in both expression have similar values;
Now, add equation i and ii;
(-2x + 5x) + (8y -8y ) = -8 + 20
3x = 12
Divide both sides by 3;
x = = 4
Now, to find y; put x = 4 into equation i,
-2(4) + 8y = -8
-8 + 8y = -8
Add +8 to both sides of the expression;
-8 + 8 + 8y = -8 + 8
8y = 0
y = 0
Answer:
4. °
Step-by-step explanation:
Given:
The tangent of the angle is given as:
Since the angle is negative, it means that it is measured in the clockwise direction as angles measured in clockwise direction are negative and that measured in counter clockwise directions are positive.
-212° when measured from counter clockwise direction will be equal to:
Therefore, =
Now, we have the identity for tan as:
Here,
Therefore,
Hence, = = °
<h3>
Answer: Choice D which is (13-5x)/(2x-8)</h3>
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Explanation:
Fractions in all honesty are quite simply a pain. They complicate things greatly. Luckily we can cancel out some of the fractions here. Note we have inner fractions 3/(x-2) and 4/(x-2), both of which having a denominator of (x-2).
Focus on just the stuff up top which is 3/(x-2) - 5. Multiply both of the terms by the expression (x-2) to get the fraction 3/(x-2) turning into just 3. The 5 becomes 5(x-2) = 5x-10. So we end up with the expression 3 - (5x-10) = 3-5x+10 = 13-15x up top
Similarly, in the denominator we have 2 - (4/(x-2)) which becomes 2(x-2) - 4 = 2x-4-4 = 2x-8 when we multiply everything by (x-2) to cancel out that inner fraction.
So that's how we end up with (13-5x) all over (2x-8) as our final answer.
Answer:
No
Step-by-step explanation:
6/2=3
14/42=1/3=0.33333333333333333333