3 years ago

Point K is the midpoint of JL. If JK=7x+4 and KL=12x−21, what is the length of JL?

1 answer:

7 0

Since K is the midpoint of JL, it divides the segment JL into two equal halves.
That means ⇒ JK = KL
Substitute expressions for the parts ⇒ 7x + 4 = 12x - 21
Now solve the equation: 7x - 7x + 4 = 12x - 7x - 21
4 = 5x - 21
4 + 21 = 5x - 21 + 21
25 = 5x
5 = x
Substitute the value into one of the expressions: JK = 7(5) + 4 = 39
JL = JK + KL
JL = 39 + 39 = 78

You might be interested in

HELP ASAP!! Linear Equations x/7=3 A. 21 B. 3/7 C. 20 D. -21

vredina [299]

Answer:

Step-by-step explanation:

put 21 were x is and then divide 21÷7=3

6 0

3 years ago

Read 2 more answers

Plzzzz help!!!! I don't understand

Kazeer [188]

Answer:

x = 1

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Rewrite each subtraction problem as a addition problem x-156=279

Sauron [17]

Answer:

the answer is 123 123+156=279.

4 0

3 years ago

~HELP PLEASE~ What is the value of X?

SashulF [63]

I don’t know but your in higher math than me so can you help me on my questions please. Sorry I know that seems kinda selfish but I need help. I know how you feel. No one will help me.

3 0

3 years ago

Read 2 more answers

Hillel is juggling flaming torches to raise money for charity. His initial appearence raises $500, and he raises $15 for each mi

7nadin3 [17]

Answer:

r(t) = 15t+500

Step-by-step explanation:

Since the amount of money (r) is a function of the time (t) we will make it the y-value. t is how much time and he gets $15 a minute so we multiply t by 15. 500 is how much he gets paid for doing it. If he showed up and just left, he would still get 500.

8 0

3 years ago