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3 years ago

HELP PLEASE HURRY WILL MARK BRAINLIEST!!!!!!

Mathematics

1 answer:

LiRa [457]3 years ago

8 0

Answer:

c . 63

Step-by-step explanation:

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A coin that, when flipped, comes up heads with probability p is flipped until either heads or tails has occurred twice. Find the

scZoUnD [109]

Answer:

Following are attached the images for step by step solution.

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Step-by-step explanation:

7 0

4 years ago

Decrease £680 by 10%

abruzzese [7]

Two ways to do it.
1
if we decrease 10%, then we'll have the 90% of the original, so we have:
= 680(90%)
= 680(90/100)
= 612
then 612 is 680 decreased by 10%

2
what is the 10% of 680, call it y?, then reduce it from 680
y = 10%(680) = (10/100)(680) = 68
So, to decrease 680 by 10%, we subtract 680 - 68 = 612

3 0

4 years ago

For what value of k does the equation <br> 4+3x=(k+2)x+8

Elena L [17]

4+3x = (k+2)x + 8
4+2+3x = (k+2)x + 8 - 2
6+3x = (k+2)x + 6
then 3x = k+2
so k = 3X-2

6 0

4 years ago

Which is the rationalized form of the expression sqrtx/sqrtx+sqrt7

ArbitrLikvidat [17]

Answer:

(x - √7*√x) / (x - 7)

Step-by-step explanation:

I suppose your expression is √x / (√x + √7)

(√x * (√x - √7)) / ((√x + √7) * √x - √7)) = (√x * √x - √7 * √x) / (x - 7)

= (x - √7*√x) / (x - 7)

5 0

3 years ago

Brady rode his bike 70miles in 4 hours. He rode at an average speed of 17 mph for t hours and at an average speed of 22mph for t

sladkih [1.3K]

Answer:

The Distance cover by Brandy rod at slower speed of bike is 61.2 miles .

Step-by-step explanation:

Given as :

The total distance cover by Brady rode with bike = d = 70 miles

The total time taken by Brady rode with bike = 4 hours

The time taken for average speed of 17 mph = t hours

Let The time taken for average speed of 22 mph = (4 - t) hours

Let The distance cover for slower speed = d miles

<u>Now, From formula </u>

Distance = speed × time

So, Total distance cover = distance at slower speed + distance at faster speed

Or, 70 miles = 17 mph × t hours + 22 mph × (4 - t) hours

Or, 70 = 17 t + 22 × 4 - 22 × t

or, 70 = 88 + 17 t - 22 t

or, 22 t - 17 t = 88 - 70

or, 5 t = 18

∴ t = $\dfrac{18}{5}$

i.e t = 3.6 hours

So, The time taken for average speed of 17 mph = t = 3.6 hours

And The time taken for average speed of 22 mph = (4 - 3.6) = 0.4 hour

So, Distance cover at slower speed = slower speed × time at slower speed

i.e d = 17 mph × 3.6 h

Or, d = 61.2 miles

So, Distance cover at slower speed = d = 61.2 miles

Hence, The Distance cover by Brandy rod at slower speed of bike is 61.2 miles . Answer

4 0

3 years ago