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Sonja [21]
3 years ago
9

In order for Brady to earn a B in his biology course, his test scores must average at least 80%. On the first 5 tests, he has an

average of 77%. There is one test remaining in the course. What is the minimum score Brady needs to earn on the last test to receive a B in the class?
Mathematics
2 answers:
Roman55 [17]3 years ago
8 0
Total of percentages in first 5 tests = 77 x 5 = 385.
Minimum total of the percentages in the 6 tests = 80 x 6 = 480.
Required minimum percentage in last test = 480 - 385 = 95%
The answer is 95%.
balandron [24]3 years ago
3 0
L the minimum is like a 60 or 50
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vodomira [7]
Since 8 students take both, that leaves only 4 students who take Algebra I alone.
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Let f(x)=15/(1+4e)^(-0.2x)<br><br> What is the y-intercept of the graph of f(x) ?
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That means when x=0
e^-0.2x =e^0=1
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5 0
4 years ago
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Write a linear function f with f(0)=7 and f(3)=1.
choli [55]

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a = ( 0 , 7 ) & b = ( 3 , 1 )

First need to find the slope using the following equation :

slope =  \frac{y(b) - y(a)}{x(b) - x(a)}  \\

slope =  \frac{1 - 7}{3 - 0}  \\

slope =  \frac{ - 6}{3}  \\

slope =  - 2

_________________________________

We have following equation to find the point-slope form of the linear functions using the slope and one of the through points .

y - y(0) = m \times ( \: x - x(0) \: )

x(0) = x - coordinate \:  \: of  \:  \: through \:  \: point \\

y(0) = y - coordinate \:  \: of \:  \: through \:  \: point \\

m = slope

I choose point (( a )) to put in the equation.

y - 7 =  - 2 \times (x - 0)

y - 7 =  - 2x  + 0

y - 7 =  - 2x

Add sides 7

y - 7 + 7 =  - 2x + 7

y =  - 2x + 7

This the slope-intercept form .

Done...

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7 0
3 years ago
Arlo invested $4000 in an account that earns 5.5% interest, compounded annually. The formula for compound interest is A(t)=P(1+i
USPshnik [31]

\bf ~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$4000\\ r=rate\to 5.5\%\to \frac{5.5}{100}\dotfill &0.055\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{annually, thus once} \end{array}\dotfill &1\\ t=years\dotfill &4 \end{cases} \\\\\\ A=4000\left(1+\frac{0.055}{1}\right)^{1\cdot 4}\implies A=4000(1.055)^4\implies A\approx 4955.2986

4 0
3 years ago
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Alexandra earns $125 from her paper route each month, but she spends about $20 each month on personal expenses to pay for a scho
SVEN [57.7K]
125 per month-$20 per month expences=105 savings each month
800/105= number of months needed to save

Answer 7.6 (rounded) roughly about 7 and a half months. If shes paid monthly, then 8 montjs needed
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