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Flauer [41]
2 years ago
9

The sum of three numbers is 129. The third number is 4 times the first. The first number is 9 less than the second. What are the

numbers?
Mathematics
1 answer:
Rasek [7]2 years ago
8 0
X=23, Y=14, & Z=92 is your answer
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Find AB, given that line AD is the perpendicular bisector of BC
astraxan [27]

Answer:

AB = 9

Step-by-step explanation:

The perpendicular bisector divides Δ ABC into 2 congruent triangles, that is

Δ ABD ≅ Δ ACD , then

AB = AC = 9

5 0
3 years ago
Mr Gordon bought 2 1/2 pounds of apples 1.25 pounds of pears and 3 3/4 pounds of oranges to his sister on the way home . How man
Anton [14]
The answer would be 7.5 pounds of fruit.
3 0
3 years ago
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Jack and Jill are trying to find the slope of a line segment connecting two points, (x1, y1) and (x2, y2). Jack uses the formula
Nikolay [14]
The correct question is
<span>Jack and Jill are trying to find the slope of a line segment connecting two points, (x1, y1) and (x2, y2). Jack uses the formula m = (y2 - y1)/( x2 - x1) . Jill mistakenly uses a different formula, but still gets the right answer. Which formula COULD she have used? A) (x2 - x1)/( y2 - y1) B) (y1 - y2)/( x1 - x2) C) (x1 - x2)/( y2 - y1) D) (y2 - y1)/( x1 - x2)

we know that

the correct formula to calculate the slope is
m=(y2-y1)/(x2-x1)
then 
</span><span>if both numerator and denominator multiply it by -1
</span>
m=-(y2-y1)/-(x2-x1)---------> m=[-y2+y1]/[-x2+x1]
m=[y1-y2]/[x1-x2]

therefore

the answer is the option 
B) (y1 - y2)/( x1 - x2)

4 0
3 years ago
Solve for x.<br><br> 12 = x + 3 X=_____
alexandr1967 [171]

For this case we must find the value of the variable "x" of the following equation:

12 = x + 3

So, we follow the steps:

Subtracting 3 from both sides of the equation we have:

12-3=x+3-3

Different signs are subtracted and the sign of the major is placed:

9 = x\\x = 9

Thus, the value of x is 9.

Answer:

x = 9

5 0
3 years ago
What is the answer to the question?​
kotegsom [21]

Answer:

What is the sum of the exterior angles in a regular 15-gon?

The sum of the exterior angles in any convex polygon, including a regular 15-gon, is 360∘.

Step-by-step explanation:

thank me later

mark me as brainliest please

3 0
3 years ago
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