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borishaifa [10]
3 years ago
11

Ren can eat a pizza in 3 minutes and Isaac can eat a pizza in four minutes. How long will it take them to eat the pizza together

?
Mathematics
2 answers:
Ronch [10]3 years ago
8 0
Ren and Isaac will eat the pizza in a 7 minutes
julia-pushkina [17]3 years ago
8 0

Answer:

1.71 min per pizza

Step-by-step explanation:

Ren's rate:

3 min per pizza (take inverse to get pizza per min)

= 1/3 pizza per min

Issac's rate:

4 min per pizza (take inverse to get pizza per min)

= 1/4 pizza per min

Combined rate = Ren's rate + Issac's rate

= 1/3 + 1/4

= 4/12 + 3/12

= 7/12 pizza per min   (take inverse to get min per pizza)

= 1 / (7/12) min per pizza

= 12/7 min per pizza

= 1.71 min per pizza

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A system of equations has infinitely many solutions. If 2y - 4x = 6 is one of the equations, which could be the other
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Answer:

-y = -2x - 3

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Step-by-step explanation:

When equations are equivalent, they will have infinitely many solutions.

If you want to find an equivalent equation, you can <u>multiply/divide every</u> term in the equation by the same number. You can also <u>rearrange</u> the equation.

Since the options mostly have "y" by itself, start by <u>rearranging</u> to isolate "y" in the given equation.

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2y - 4x = 6                Move "-4x" first. It's reverse is +4x.

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2y/2 = 6/2 + 4x/2

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y = 2x + 3         -y = -2x - 3

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y = 2x + 3

y*-1 = 2x*-1 + 3*-1

-y = -2x + (-3)                Negative and positive make a negative

-y = -2x - 3                     Same as option 3

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