Add the 3 numbers that you know.
Multiply the mean of 73 by 5 (numbers you have).
Add the numbers you are given.
Subtract the sum you have from the total sum to find your missing number.
B because 4 - 10
is 4 less then 10
To solve number eight, you would set it up as an equation equal to 180
72+7x+24=180
Next you would combine like terms 24 and 72 to get 96
Now the equation is 96+7x=180 Now, subtract 96 from 180 and then divide by seven to get x, so then x is equal to 12
Answer:
The answer is the third option, C = 5 + 0.25m
Step-by-step explanation:
We already know that the official price for the taxi is 5 dollars, so we aren't multiplying that value by anything.
However, the text mentions that for each mile, Maria is taxed an extra .25 cents. Therefore, you have to add the base amount, 5, plus the 25cent with the m next to it to symbolize that however many miles she goes, the 25 cents will be multiplied by that value.
<h3>
Answer: 14 km per hour</h3>
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Work Shown:
x = rowing speed when there is no current
c = speed of the current
speeds are in km per hour
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Going downstream, i.e. with the current:
x+c = faster speed since the current is pushing you
distance = rate*time
d = r*t
40 = (x+c)*2
x+c = 40/2
x+c = 20
c = 20-x
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Going upstream, i.e. against the current:
x-c = slower speed since the current is working against you
d = r*t
16 = (x-c)*2
16 = 2x-2c
2x-2c = 16
2(x-c) = 16
x-c = 16/2
x-c = 8
x-(20-x) = 8 ... plug in c = 20-x
x-20+x = 8
2x-20 = 8
2x = 8+20
2x = 28
x = 28/2
x = 14 km per hour is the rowing speed when there is no current
Side note: the speed of the current is c = 20-x = 20-14 = 6 km per hour.
