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katovenus [111]
2 years ago
14

which equation is in standard form ? -1-3y=2(y-2x) -14x+6y=-30 2x+3y=-5x-2y+31 2(x-y)=2

Mathematics
1 answer:
laiz [17]2 years ago
7 0

the second one is standard

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Step-by-step explanation:

Slope (m) = 0.25

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A donut machine can make 3000 donuts in 10 hours. How long would it take the machine to make 600 donuts? How many donuts are mad
lorasvet [3.4K]

Answer:

it would take it 2 hours to make 600 donuts, it makes 5 donuts a minutes

Step-by-step explanation:

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6 0
2 years ago
Maya has 3 times as many dimes as nickels. She has 4 more quarters than nickels. if she has a total of $9.40, how many of each t
puteri [66]

Answer:  nickels = 14, dimes = 42, quarters = 18

<u>Step-by-step explanation:</u>

Let n represent nickels <em>which has a value of $0.05 </em>

Let d represent dimes <em>which has a value of $0.10</em>

Let q represent quarters <em>which has a value of $0.25</em>

It is given that:

                       n = n

                      d = 3n

                      q = n + 4

and their total value is $9.40    ⇒     n + d + q = $9.40

Use substitution to find the quantity of nickels:

.05(n) + .10(3n) + .25(n + 4) = 9.40

 5n    +  10(3n) +   25(n+4)   = 940           <em>multiplied by 100 </em>

 5n    +   30n   +  25n + 100 = 940          <em>distributed</em>

                            60n + 100 = 940          <em>added like terms</em>

                            60n           = 840          <em>subtracted 100</em>

                                 n           = 14            <em>divided by 60</em>

n = 14

                d = 3n

                   = 3(14)

                   = 42

                                       q = n + 4

                                          = (14) + 4

                                           = 18

4 0
2 years ago
The cost of coffee is determined by the type of coffee beans that are mixed together. The cost of a local mix of Arabica and Rob
guapka [62]
700a+1200r=1000000       (then plug in the a)
700(1000) +1200r=1000000        (simplify)
700000+1200r=1000000        (subtract 700000 from both sides)
1200r=300000             (divide by 1200 on both sides)
r=250
250 pounds
5 0
3 years ago
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