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Ksenya-84 [330]

3 years ago

14

Anthony and Miguel go to the store to purchase some new DVD's. There is an advertisement displayed in the window that states the

y can buy 3 DVD's for $22.50 or 5 DVD's for $37.50.
Is this a proportional relationship? Explain how you know.

1 answer:

inessss [21]3 years ago

5 0

Answer: it is a porportional relationship

Step-by-step explanation: looked it up

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the difference between seven times one number and three times a second number is 25. The sum of twice the first and five times t

inysia [295]

$\left \{ {{7*x - 3*y=25} \atop {2*x + 5*y=95}} \right.$

$\left \{ {{7x - 3y=25}(I) \atop {2x + 5y=95}(II)} \right.$

$\left \{ {{7x - 3y=25}simplify*(5) \atop {2x + 5y=95}simplify*(3)} \right.$

$\left \{ {{35x - \diagup\!\!\!\! 15 y=125} \atop {6x + \diagup\!\!\!\! 15y=285}} \right.$

$\left \{ {{35x =125} \atop {6x =285}} \right.$

$41x = 410$

$\boxed{x=10}$

<span>Replace the value of "x" in the second equation (II) to find the value of "y", thus:
</span> $2x + 5y=95$
$2*(10)+5y = 95$
$20+5y=95$
$5y=95-20$
$5y=75$
$y = \frac{75}{5}$
$\boxed{y=15}$

The numbers (10,15)

5 0

3 years ago

How do i find the answer?

Savatey [412]

distance = rate * time

rate = distance / time

rate = .75 miles / .666666 hours

rate = 1.125 miles per hours (.125 = (1/8) ) so

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3 0

3 years ago

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Given 2x² = -8, x is ____

IrinaVladis [17]

Answer:

2x² = -8

x² = -4

The answer is no real solutions (x ∉ R) because a perfect square cannot be negative.

5 0

3 years ago

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Every month Marina pays $79 for mobile phone service, $59.95 for cable service, and $45.50 for internet service. She can switch

belka [17]

She would save 54.45 because addding them up individually before the plan would cost 184.49 and to find the difference all you have to do is subtract 184.49-129.99 and that would tell you how much she saved

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2 years ago

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A 2-liter bottle is filed completely with water from a faucet in 10seconds. How much water is filled into the bottle each second

andreev551 [17]

In 10 seconds, in fills = 2 L
so, in 1 sec, it will fill = 2/10 L = 1/5 L = 0.2 L or 200 mL

In short, Your Answer would be 0.2 Liter or 200 milliliter

Hope this helps!

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3 years ago

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