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ollegr [7]
3 years ago
15

You have prices to rev

Mathematics
1 answer:
Alex17521 [72]3 years ago
8 0

Answer:

34 minutes

Step-by-step explanation:

Given

Time\ Spent = 6

Phone\ Calls = 40

Required

Number of minutes left to spend (x)

Since there's only 1 minute left to spend on every other call;

Time left = x * 1

Time left = x

The required can further be calculated using:

Time\ Spent + Time\ Left = Phone\ Calls

This gives:

6 + x = 40

Subtract 6 from both sides

x = 40 - 6

x = 34

<em>Hence, there are 34 minutes left to spend</em>

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Yakvenalex [24]

Answer:

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3 years ago
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The expression p/x^2 - 5x +6 simplifies to x+4/x-2. Which expression doees p represent?
gladu [14]
We know that
(ad)/(bd)=d/d time a/b=a/b since d's cancel
also
if a/b=c/d in simplest form, then a=c and b=d

we have
p/(x^2-5x+6)=(x+4)/(x-2)
therefor

p/(x^2-5x+6)=d/d times (x+4)/(x-2)
p/(x^2-5x+6)=d(x+4)/d(x-2)

therefor
p=d(x+4) and
x^2-5x+6=d(x-2)

we can solve last one
factor
(x-6)(x+1)=d(x-2)
divide both sides by (x-2)
[(x-6)(x+1)]/(x-2)=d
sub


p=d(x+4)
p=([(x-6)(x+1)]/(x-2))(x+4)
p= \frac {(x-6)(x+1)(x+4)}{(x-2)}

7 0
3 years ago
Help me plsssssssssssssssssss
kotykmax [81]

Answer:

The function that best models the given data is;

B. h(t) = -6.73·t² + 14.19·t + 0.83

Step-by-step explanation:

The data in the given table is presented as follows

\begin{array}{cccccc}Time, \, t(s)&0&0.5& 1.0 & 1.5& 2.0\\Height, \, h \, (m) & 1.0 & 5.42 & 9.71 & 5.9 & 2.6\end{array}

Where;

Time, t(s) is the independent variable

Height, h(m) is the dependent variable

Therefore, we have;

When t = 0, h = 1.0

From the given functions, we have the following table of the result of the function generated with Microsoft Excel

\begin{array}{cccccc}\\t & h & A & B & C& D\\0 & 1.0 & 1.22 & 0.83& 0.83& 1.22\\0.5 & 5.42 & 5.26 & 6.2425 & 9.6075 & 10.17\\1 & 9.71 &  4.39 & 8.79 & 21.75 & 24.03 \\ 1.5 & 5.9 &  -1.39& 6.9725& 37.2575 &42.8\\2& 2.6 & -12.08 & 2.29 & 56.13 & 66.48\end{array}

By comparison, the function that nest models the given data is the function 'B', given as follows;

h(t) = -6.73·t² + 14.19·t + 0.83.

3 0
3 years ago
What is the correct order of operations for simplifying the expression (x+3)^2-(x^2+9)/2x^2?
kramer

Answer:

The given expression is simplified as \frac{(x+3)^2-(x^2 +9)} {2x^2}  = \frac{3}{x}

Step-by-step explanation:

Here, the given expression is:

\frac{(x+3)^2-(x^2 +9)} {2x^2}

Now, with ALGEBRAIC IDENTITIES:

(a+b)^2  = a^2 + b^2 + 2ab

Now, similarly: (x+3)^2  = x^2 + (3)^2 + 2x(3)   = (x^2  + 9 + 6x)

Now, substituting the values in the given expression, we get:

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Hence, the given expression \frac{(x+3)^2-(x^2 +9)} {2x^2}  = \frac{3}{x}

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3 years ago
Find the solution to the systems. x+y=1 and 3y=-3x+3
jenyasd209 [6]

Answer:

infinite number of solutions

Step-by-step explanation:

x+y=1

3y=-3x+3 ⇒ y=-x+1 ⇒ y+x=1

both equations are the same, so they have infinite number of solutions

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