1) What is the value of the expression 3 4 + 15.45 - 19.75 + 7.87?
1 answer:
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Check the picture below.
we know that AL is an angle bisector, so the angle at A gets cuts into two equal halves, we also know the angle at B is 30°, so the triangle ABC is really a 30-60-90 triangle, meaning the angle at A is really a 60° angle, cut in two halves gives us 30° and 30° as you see in the picture.
if the angles at A and B, inside the triangle ABL, are equal, twin angles are only made in an isosceles by twin sides, that means that AL = BL.
Looking at the triangle ALC, we can see is also another 30-60-90 triangle, and we can just use the 30-60-90 rule to get x=CL.
Answer:
x > -1
Step-by-step explanation:
* Remember that,
if you have a negative sign (-) infront of the x you have to change the direction of the inequality sign.
Hope this helps you .
Let me know if you have any other questions :-)