3 years ago

David picks a card at random.

Mathematics

1 answer:

jonny [76]3 years ago

7 0

Answer:

Independent

Step-by-step explanation:

These events are independent since a first card is replaced before choosing a second card.

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1. 12(x−4)= 2. −8(y+12)= 3. −(x−11)=

Natali5045456 [20]

Answer:

12x-48

-8y-96

-x+11

Step-by-step explanation:

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4 years ago

An airplane flew with the wind for 2.5 hours and returned the same distance against the wind in 3.5 hours. If the cruising speed

KengaRu [80]

Answer:

60 miles per hour.

Step-by-step explanation:

Let r represent speed of wind blowing in miles per hour.

We have been given that the cruising speed of the plane was a constant 360 mph in air. The speed of the plane is the direction of wind would be $360+r$ .

The speed of the plane is the opposite direction of wind would be $360-r$ .

$\text{Distance}=\text{Speed}\times \text{Time}$

Distance covered in the direction of wind would be $2.5(360+r)$ .

Distance covered in the opposite direction of wind would be $3.5(360-r)$ .

Since both distances are same, so we will get:

$2.5(360+r)=3.5(360-r)$

$900+2.5r=1260-3.5r$

$900-900+2.5r+3.5r=1260-900-3.5r+3.5r$

$6r=360$

$\frac{6r}{6}=\frac{360}{6}$

$r=60$

Therefore, the wind is blowing at a rate of 60 miles per hour.

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3 years ago

Solve the following equation for y. Assume that b and y are non-zero real numbers. show and explain your work.

MA_775_DIABLO [31]

6-by=19
minus 6 from both sides
-by=19-6
-by=13
divide both sides by -b
y=13/-b
y=-13/b

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3 years ago

What does a graph look like when y=-2+5?

dedylja [7]

I’m guessing it’s -2x? if so it’s a straight line going past points (0,5) and (2.5,0)

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3 years ago

0.08 is 10 times as much as what?

Margarita [4]

0.008

(0.008 x 10 = 0.08)

3 0

4 years ago

Read 2 more answers