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3 years ago

14

Which of these is a unit rate?

1 answer:

lisov135 [29]3 years ago

8 0

Answer:

4.

Step-by-step explanation:

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How far away can a boy ride on a bicycle if he rides away at 10 kilometers per hour and returns at 9 kilometers per hour? The en

tamaranim1 [39]

Alright, so he went the same distance there and back, but at different speeds

hmm

d=st
d/s=t

total time is 9.5hr

alright

so distance there=distance back we will call both of them d

so

speed there is 10
speed back is 9
total time is 9.5

so
d/sthere+d/sback=totaltime
d/10+d/9=9.5
times both sides by 90
9d+10d=855
19d=855
divide both sides by 19
d=45

he can ride 45mi away

4 0

2 years ago

Evaluate 11y when y=5

aleksklad [387]

Answer:

55

Step-by-step explanation:

11y

11×5

55

hope it helps

4 0

2 years ago

Read 2 more answers

Identify the seventh term in the sequence in which a1=4096 and r=1/2

Alex777 [14]

An=a*q^(n-1)
a7=a*q^6
a7=4096*(1/2)^6=4096/32=128

3 0

3 years ago

n your computer store you charge $1012 per computer sold. Your costs are given by the equation C(x) = 4x^2 + 4x - 80 where x is

ella [17]

Answer:

63568 dollars

Step-by-step explanation:

Given that in your computer store you charge $1012 per computer sold. Your costs are given by the equation

$C(x) = 4x^2 + 4x - 80$

where x is the number of computers sold.

Revenue = sales price *no of computers sold

= 1012x

Profit = Revenue - cost

= $1012x-( 4x^2 + 4x - 80)\\= 1008x-4x^2+80\\$

Use derivative test to find maximum profit

$C'(x) = 1008-8x \\C''(x)= -x$

Equate I derivative to 0

x= 128

i.e. if 128 computers are manufactured and sold profit wouldbemaximum

Profit maximum= $1008(128)-4(128)^2+80\\=63568$

3 0

3 years ago

Pleaseeeeee helppppp, ill give you brainley i promise

Dima020 [189]

Its the third one for the answer

8 0

2 years ago