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AlexFokin [52]
4 years ago
8

Sarabi drove 20 mi at 40 mph. How long did she drive?

Mathematics
1 answer:
liubo4ka [24]4 years ago
8 0
1/2 of the time

d=st
distance=speed times time
we want to find time
divide both sides by speed
d/s=t

d=20
s=40
20/40=t
1/2=t
this is in hours

she drove for 1/2 hour or 30 mins
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vovangra [49]

The <em>cost of the jacket</em> purchased using the <em>System of equation</em> is $46.16

<u>Given the cost prices</u> :

  • Total cost = $95.11
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  • Cost of jacket = x - 2.79

<u>We could set up an equation relating the cost of each item to the total Cost : </u>

<em>Total cost = cost of jacket + cost of shoes</em>

95.11 = x - 2.79 + x

95.11 = 2x - 2.79

95.11 + 2.79 = 2x

97.90 = 2x

x = 97.90 / 2

x = 48.95

Cost of jacket = $48.95 - 2.79 = $46.16

Therefore, Cost of jacket is $46.16

Learn more : brainly.com/question/24938959

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3 years ago
Simplifying expressions with exponents
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3 years ago
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Junior's brother is 1 1/2
AlladinOne [14]

Answer:

Step-by-step explanation:

1 1/5 of 1 1/2 meters  

= (1+1/5) x (1+1/2)  

= 1x1 + 1x1/2 + 1x1/5 + 1/5*1/2  

= 1 + 1/2 + 1/5 + 1/10  

= 1 + (1x5+1x2+1)/10  

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3 years ago
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Answer:

y=1/2x-3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

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m=(-7+1)/-12

m=-6/-12

m=1/2

y-y1=m(x-x1)

y-(-1)=1/2(x-4)

y+1=1/2x-4/2

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y=1/2x-3

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3 years ago
Write the formula for an exponential function with initial value 300 and decay factor 0.73
postnew [5]

Answer: 300*0.73^x

Step-by-step explanation:

300 is the initial value and every time x goes up by 1, the value get multiplied by 0.73

when x=3

then the value would be 300*0.73*0.73*0.73 or 300*0.73^3

then for x amount of times the equation would be 300*(0.73 x times ) or 300*0.73^x

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