MATHEMATICS MIDDLE SCHOOL

Y varies directly as x
If x= 5 when y= 12 find x when y = 30

Answers

Answer 1
Answer: Set up a proportion so 12/5= 30/x so cross multiply 5 times 30 is = to 12x now divide 150 (which is 30 times 5) by 12 and you get 12.5. So 12.5 is your answer
y 12 - x 5
y 30 - x ?
x= 30 × 5 ÷ 12
x = 12.5

Related Questions

How can I write 2,351 and standard form
self-service car wash charges $4 for the initial 5 minutes plus an additional $0.75 for each minute after that. Nick only has $10 to spend on washing his car. Let m represent the number of minutes Nick spends washing his car. Create the inequality that symbolizes this situation.
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How who u solve 5+2(x-3)

What is the formula for Slope-Intercept Form of the Line

Answers

It's not the slope-intercept form of the line. 

It's the slope-intercept form of the line's equation.

                   Y = mX + B

'X' is the slope of the line

'B' is the y-intercept of the line
The formula would be : m = [y1 - y2] / [x1 - x2] 

For the first 3% of Brenda's salary, her employer matches 100% of her 401(k)contributions, and from 3% to 12%, Brenda's employer matches 50% of her
401(k) contributions. Brenda's salary is $50,000, and last year, she
contributed $6000 to her 401(k) plan. What was her employer's contribution
to the 401(k)?
A. $3000
O
O
O
B. $4500
C. $3750
O
D. $6000

Answers

Answer:$3750

Step-by-step explanation:

Answer:

3650

Step-by-step explanation:

apex

Christopher had a part-time job doing lawn work. During June, he earned $129.99. During July, he earned $412.50. What were his total earnings for June and July?

Answers

Answer:

129.99+412.50=$542.49

Step-by-step explanation:

Which values of m and b will create a system of equations with no solution? Select two options. y = mx + b y = –2x + A system of equations. y equals m x plus b. y equals negative 2 x plus StartFraction 3 over 2 EndFraction. A coordinate grid with a line labeled y equals negative 2 x plus StartFraction 3 over 2 EndFraction and passes through the points (9, 1.5) and (1, 0.5). m = –3 and b = m equals negative 3 and b equals negative StartFraction 2 over 3 EndFraction. m = –2 and b = m equals negative 3 and b equals negative StartFraction 1 over 3 EndFraction. m = 2 and b = m equals 2 and b equals negative StartFraction 2 over 3 EndFraction. m = m equals StartFraction 3 over 2 EndFraction and b equals negative StartFraction 2 over 3 EndFraction and b = m equals negative StartFraction 3 over 2 EndFraction and b equals negative StartFraction 2 over 3 EndFraction m = -2 and b = m equals negative 2 and b equals negative StartFraction 2 over 3 EndFraction

Answers

Answer:

B, E

Step-by-step explanation:

Given the first function:

y=-2x+(2)/(3)

A Linear System with no solutions is graphically represented by two parallel lines, therefore with the same slope. So in this case, m has to be equal to -2.

And to this inconsistent system, if the linear parameter is not so relevant. So if m=-2 then b may be either equal to -1/3 or -2/3 according to the options.

Given the alternatives

No Solution System:

\left\{\begin{matrix}y=-2x+(2)/(3) & \n y=-2x-(1)/(3) & \end{matrix}\right.

Or

\left\{\begin{matrix}y=-2x+(2)/(3) & \n y=-2x-(2)/(3) & \end{matrix}\right.

Answer:

m = -2 and b = -1/3

m = -2 and b = -2/3.

Step-by-step explanation:

y = -2x - 1/3

y = -2x - 2/3

This system has no solutions because y cannot be 2 different values at once.

Erica earns a rebate each month on her meals and movie tickets. She earns $3 for each movie ticket and $0.80 for each meal. Last month Erica purchased 15 meals and earned $18.Part A: Create an equation that will determine the number of movie tickets she purchased. (3 points)

Part B: Solve this equation justifying each step with an algebraic property of equality. (6 points)

Part C: How many movie tickets did Erica purchase last month?

Answers

A) Let t represent the number of tickets Erica bought. The the equation describing her rebates can be written as

... 3t + 0.80×15 = 18

B) Here's the solution to the equation.

... 3t + 12 = 18 . . . . . . simplify; rules of arithmetic

... 3t = 6 . . . . . . . . . . .subtract 12; subtraction property of equality

... t = 2 . . . . . . . . . . . . divde by 3; division property of equality

C) Erica bougth 2 movie tickets last month.

On Serena's tenth birthday,her mom was 3 times Serena's age.How old will Serena and her mom be when her mom's age times 0.5 will equal Serena's age?

Answers

Serena 10th birthday means she was 10 and her mom was 3 times as old which is 30. They are 20 years apart so 0.5 or 1/2 her mom's age will be Serenas age when her mom is 40 and she is 20

Answer:

15 yrs

Step-by-step explanation:

10 x 3 = 30

30 x 0.5 = 15.0

Other Questions
Sue wants to know how many families in her small neighborhood of 50 homes would volunteer to help at a neighborhood animal shelter. She put all the addresses in a bag and drew a random sample of 25 addresses. She then asked those families if they would volunteer to help at the shelter. She found that 18% of the families would volunteer to help at the shelter. She claims that 18% of the neighborhood families would be expected to help at the animal shelter. Is this a valid inference?A Yes, this is a valid inference because the 25 families speak for the whole neighborhood B Yes, this is a valid inference because she took a random sample of the neighborhood C No, this is not a valid inference because she only asked 25 families D No, this is not a valid inference because she did not take a random sample of the neighborhood
Write the number that is 6 more tens and 8 more ones than the number 30
Which statement is true about the diagram below?
For which equation is 7 a solution​