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alukav5142 [94]
3 years ago
7

Danielle needs to walk 2.5. if she wants to teach her destination in 30 minutes(1/2),how fast does she need to walk?

Mathematics
1 answer:
adelina 88 [10]3 years ago
8 0

Answer:

the correct answer is B. 5 miles per hour

Step-by-step explanation:

if she walks 5 miles in a hour she can walk 2.5 miles in 30 minutes

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What is (x - 4y) (-3x - 2y) = ?
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Randy has to raise $50.00 to repair his bicycle. He is only $1.00 short. He has only $1 and $5 bills. If he has one more $1 bill
Nezavi [6.7K]

Answer:

Randy has eight $5 bills and nine $1 bills

Step-by-step explanation:

Randy needs $50.00

And we know that he his only $1.00 short, so he has $49.00

let's define:

x = number of $1 bills that he has

y = number of $5 bills that he has.

then:

x*$1 + y*$5 = $49

We know that he has one more $1 bills than $5 bills.

we can write this as

x = y + 1

So we have a system of two equations and two variables:

x*$1 + y*$5 = $49

x = y + 1

First we can see that the variable "x" is isolated in the second equation, now we can replace that in the other equation:

x*$1 + y*$5 = $49

(y + 1)*$1 + y*$5 = $49

now we can solve this for y.

y*$1 + $1 + y*$5 = $49

y*($1 + $5) = $49 - $1 = $48

y*$6 = $48

y = $48/$6 = 8

He has 8 $5 bills

and we know that:

x = y + 1

x = 8 + 1 = 9

he has 9 $1 bills.

8 0
3 years ago
Lucy fills a bathroom sink with water. Is the amount of water more than one liter, about one liter, or less than one liter . Exp
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What is y? i am having trouble figuring out what y is
Andre45 [30]

Answer:

\sf \boxed{\bf y =5\sqrt{22}}

Step-by-step explanation:

<h3>45° - 45° - 90° triangle:</h3>

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a is the side opposite to 45°.

From the figure, a = 5√11

The side opposite to 90° is a√2.

y = a√2

  \sf = 5\sqrt{11} * \sqrt{2}\\\\   = 5*\sqrt{11*2}\\\\   = 5\sqrt{22}

8 0
1 year ago
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