MATHEMATICS HIGH SCHOOL

FJ= 24
JH = 3x-3
21. x = ?

can someone help asap please!!!
FJ= 24 JH = 3x-3 21. x = ? can - 1

Answers

Answer 1
Answer:

Answer:

\boxed {x = 7}

Step-by-step explanation:

FJ and JH is half of the whole measurement of FH. So, to find the value of  x, you need to write an expression by using those measurements of both FJ and JH. Then, solve for x:

FJ = 24

JH = 3x - 3

3x - 3 = 24

-Solve:

3x - 3 = 24

3x - 3 + 3 = 24 + 3

3x = 27

(3x)/(3) = (27)/(3)

\boxed {x = 7}

So, the value of x is 7.

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What way of solving systems would you Ik use for these two equations ? X=3 y=2x+1

Answers

Answer:

Substitution

Step-by-step explanation:

Subtitue x=3 into the second equation

y=2(3)+1

y=6+1

y=7

Mr. Mendez ran 13.1 miles at a constant rate for 150 minutes.To find how he ran,you solve the equation 13.1=x•150.What does x represent?

Answers

Answer:

His speed in miles per minute

Step-by-step explanation:

HELP NO EXPLANATION NEEDED :)

Answers

Answer:

C

Step-by-step explanation:

Select the correct answer.The elimination method is ideal for solving this system of equations. By which number must you multiply the second equation to eliminate the
y variable, and what is the solution for this system?
x+3y= 42
2x - y = 14
OA. Multiply the second equation by-3. The solution is x= 12, y=9.
OB. Multiply the second equation by -2. The solution is x = 12, y=10.
OC. Multiply the second equation by 2. The solution is x = 15, y = 9.
OD. Multiply the second equation by 3. The solution is x = 12, y = 10.

Answers

Answer:

Multiply the second equation by 3. The solution is x = 12, y = 10.

Step-by-step explanation:

The given equations are :

x+3y= 42 ....(1)

2x - y = 14 ...(2)

For elimination method,

Multiply the second equation by 3.

6x-3y=42 .....(3)

Adding equations (1) and (3).

x+3y+6x-3y=42+42

7x = 84

x = 12

Put the value of x in equation (1).

12+3y= 42

3y = 30

y = 10

So, x = 12 and y = 10. Hence, the correct option is (d).

Simplify (x - y + 1) - (x + y - 1).
2x - 2y + 2
-2y + 2
2y - 2
-2x + 2y

Answers

(x - y + 1) - (x + y - 1) \n \n x - y + 1 - x - y + 1 \n \n (x - x) + (-y -y) + (1 + 1) \n \n -2y + 2 \n \n Answer: \fbox {-2y + 2}

Answer:The answer is -2y+2

Step-by-step explanation: hope this works

At 3:30 P.M. the angle between the hands of a
clock is

Answers

Well, the "hour" hand is 3.5*30=105 degrees from the "12" marking (30 degrees per hour), while the "minute" hand is 30*6=180 degrees from the "12" marking (6 degs per minute). The difference, that is, 75 degrees, is our angle. The other difference would have been over 180, which is not important for us.

Answer:

At 3:30 , the minute hand is at number 6. At 3:00 the hour hand was at number 3. Now it has moved 15 degree. Hence the angle between the two is  (90 -15) = 75 degree.
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