Answer:
<u>Option C. 9</u>
Step-by-step explanation:
The question is as following:
In triangle ABC, D is the midpoint of line AB and E is the midpoint of line BC. If AC= 3x-15 and DE= 6, what is the value of x?
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See the attached figure which represents the problem.
As shown:
D is the midpoint of line AB ⇒ AD = DB
E is the midpoint of line BC ⇒ BE = EC
Apply The Mid-segment theorem which states that the mid-segment connecting the midpoints of two sides of a triangle is parallel to the third side of the triangle, and the length of this mid-segment is half the length of the third side.
So, DE = 0.5 AC
Given: Ac = 3x-15 and DE =6
∴ 6 = 0.5 (3x - 15)
solve for x
Multiply both sides by 2
12 = 3x - 15
3x = 12 + 15 = 27
x = 27/3 = 9
So, the value of x is 9
<u>The answer is option C. 9</u>
Answer:
A
Step-by-step explanation:
It's A just trust me I'm not doing the work lol
Step-by-step explanation:
we all think then our ans is come
Step-by-step explanation:
1. +2-(+3) also is equal to 2-3. answer is -1
2. +11+(-10) also is equal to 11-10. answer is 1
3. 3+(-5) is also equal to 3-5. answer is -2
4. 22-21= 1
5. -8-(-44) is also equal to -8+44. answer is 36
6. -12+6+3 answer is -3
7. 16+12 answer is 28
8. -36+36=0
9. -4 x 10= -40
10. -1 x -1= 1
11. 7 x -7= -49
12. -4/4= -1
13. -7 x -5=35
14. -10 x 8 = -80
15. -2 x -7 = 14
Key tips to remember
a negative+ a negative also known as a double negative is always added.
negative * negative always equals positive
negative * positive always equals negative
1. The number '2' is located in the tens place
2. Since the number '3' is located in the ones place, it's telling the number '2' to stay the same
Stays the Same: 1,2,3,4
Goes Up: 5,6,7,8,etc
223 ⇒ 220
