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4 years ago

A long distance telephone company advertised the rates of 5 minutes for 85¢ and 10 minutes for $1.10.

1 answer:

8 0

Let x represent the number of minutes and y the cost. Then
y - 0.85 = (1.10 - 0.85)/(10 - 5) (x - 5)
y - 0.85 = 0.25/5 (x - 5) = 1/20 (x - 5) = 1/20 x - 1/4
y = 0.05x - 0.25 + 0.85 = 0.05x + 0.6
y = 0.05x + 0.6

The cost of 25 minutes = 0.05(25) + 0.6 = 1.25 + 0.6 = $1.85

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Help please I really need it

gtnhenbr [62]

So we want to solve 2x − 40 = 3y for x2x − 40 + 40 = 3y + 40(Add 40 to both sides!)2x = 3y + 40
Now divide both sides by 2!
 $\frac{2x}{2} = \frac{3y + 40}{2} \ \textgreater \ x = \frac{3}{2}y + 20$
Now substitute $\frac{3}{2}y + 20 for x in 2y = -4x + 48

$
$2y = -4( \frac{3}{2}y + 20) + 48$
Which then gives us..
2y = −6y − 32(Make sure to simplify both sides of the equation)2y + 6y = −6y − 32 + 6y(Now add 6y to both sides)8y = −32
Now divide both sides by 8
 $\frac{8y}{8} = \frac{-32}{8} \ \textgreater \ y = -4$
Now we have to substitute -4 for y in $x = \frac{3}{2}y + 20 \ \textgreater \ \frac{3}{2}(-4) + 20 \ \textgreater \ x = 14$
So we end up getting...
x = 14 and y = −4.
Hope this helps!

7 0

3 years ago

Previous problem : From Andy's house to Billy's hometown you can travel by 3 roads. And to get from Billy's hometown to Willie's

brilliants [131]

Answer:

Andy's house to Billy's hometown 15 ways

Andy's house to Willie's hometown 2 ways.

Step-by-step explanation:

Andy's house to Billy's hometown there are 3 roads. There 5 road from billy's hometown to Willie's house . In total there will be 15 ways to travel which is calculated by 3 * 5. For traveling to Willie's hometown there will be two ways. There are two roads that are built to get to Willie's house.

3 0

3 years ago

PLEASE HELP!!! The question is in the picture shown.

sveta [45]

Answer:

Step-by-step explanation:

The volume (V) of a cone is calculated as

V = $\frac{1}{3}$ area of base × height

= $\frac{1}{3}$ × πr² × height

Here diameter = 22, thus r = 11 and h = 22

V = $\frac{1}{3}$ × π × 11² × 22

= $\frac{1}{3}$ × π × 121 × 22

= $\frac{\pi (121)(22)}{3}$

≈ 2787.64 → C

6 0

3 years ago

Read the problem below and find the solution.

dybincka [34]

Answer:

440 ft

Step-by-step explanation:

Ball dropped and we start count from that moment:

160 ft down
80 ft up and down
40 ft up and down
20 ft up and down, end

Total distance:

160 + 80*2 + 40*2 + 20*2 = 440 ft

7 0

3 years ago

Can you add 4√10 and 4√6 together? If so, what is the answer?

Mnenie [13.5K]

Answer:

No, because the radicands are not the same

Step-by-step explanation:

7 0

3 years ago