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zloy xaker [14]
3 years ago
6

I WILL GIVE BRAINLIEST

Mathematics
1 answer:
NeX [460]3 years ago
8 0

Answer:

y = \frac{1}{4} x

Step-by-step explanation:

Given that x and y are in proportion then the equation relating them is

y = kx ← k is the constant of proportionality

To find k use the condition

x = 4 , y = 1, then

k = \frac{y}{x} = \frac{1}{4}

y = \frac{1}{4} x ← equation of proportionality

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slavikrds [6]
386 is the answer.................................
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3 years ago
At what rates did she invest?<br> $1400 invested at ____%<br> $900 invested at ____%
Mars2501 [29]

9514 1404 393

Answer:

  • $1400 at 8%
  • $900 at 10%

Step-by-step explanation:

The 1-year interest is simply the invested amount times the interest rate.

Let r represent the lower interest rate. Then r+0.02 is the higher rate, and the total interest earned is ...

  1400r + 900(r +.02) = 202

  2300r +18 = 202 . . . . . . . . . .simplify

  2300r = 184 . . . . . . . . . .subtract 18

  r = 184/2300 = 0.08 = 8% . . . . . . divide by the coefficient of r

$1400 was invested at 8%.

$900 was invested at 10%.

5 0
3 years ago
Read 2 more answers
Please help me answer this for a test and please explain reasoning behind your answer.
xenn [34]

Answer:

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6 0
3 years ago
Avery is in the business of manufacturing phones. She must pay a daily fixed cost to
tangare [24]

Answer:

The equation that represents the total cost in dollars is C = 100p + 300

Step-by-step explanation:

The form of the linear equation is y = m x + b, where

  • m is the slope ⇒ rate of change
  • b is the y-intercept ⇒ fixed amount

∵ Avery must pay a daily fixed cost to  rent the building and equipment

∴ There is a fixed amount b

∵ She pays a cost per phone produced for  materials and labor

∴ There is a rate m

∵ C represents the total cost of producing p phones in dollars

→ Form the linear equation for the situation

∴ The equation is C = m p + b

∵ The labor and materials cost $100 for each phone

∴ m = 100

→ Substitute it in the equation above

∴ C = 100p + b

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∴ p = 3 and C = 600

→ Substitute them in the equation above to find b

∵ 600 = 100(3) + b

∴ 600 = 300 + b

→ Subtract 300 from both sides to find b

∵ 600 - 300 = 300 - 300 + b

∴ 300 = b

→ Substitute it in the equation

∴ C = 100p + 300

∴ The equation that represents the total cost in dollars is C = 100p + 300

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3 years ago
29. Which property justifies the statement below?
OleMash [197]

Answer:

d I think is right sorry If it's not

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