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Effectus [21]
3 years ago
15

laurel went swimming 7 times in 3 weeks. one time she swam for 1 1/2 hours. The other 6 times she swam for 30 minutes each time.

How many hours did Laurel swim in 3 weeks?
Mathematics
1 answer:
saw5 [17]3 years ago
5 0
She swam 12 hours in 3 weeks.
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I REALLY NEED HELP PLEASE!!  
disa [49]


part A)

\bf \begin{array}{ccllll}
hours(x)&velocity(y)\\
-----&-----\\
1&6\\
3&2
\end{array}\\\\
-------------------------------\\\\


\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ 1}}\quad ,&{{ 6}})\quad 
%   (c,d)
&({{ 3}}\quad ,&{{ 2}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{2-6}{3-1}\implies \cfrac{-4}{2}\implies -2

\bf y-{{ y_1}}={{ m}}(x-{{ x_1}})\implies y-6=-2(x-1)\\
\left. \qquad   \right. \uparrow\\
\textit{point-slope form}
\\\\\\
y-6=-2x+2\implies y=-2x+2+6\implies \boxed{y=-2x+8}

part B)

well, we know y = -2x+8.... so.. what's the runner's velocity after 5hours? well, x = 5, thus y = -2(5) +8 ---> y = -2

to graph it, well, is a LINEar equation, meaning the graph is a LINE, and to graph a line, all you need is two points, and by now, you have more than two.. so graph it away.
7 0
3 years ago
last year, total sales for your grocery store were $10,342 with returns of $214 and discounts of $599. the linear feet of shelvi
kompoz [17]

Answer:

The answer would be A. $16.6 per linear foot


8 0
3 years ago
Read 2 more answers
Help will mark Brainliest​
yarga [219]

Answer:

C. is the correct answer

Step-by-step explanation:

A. is incorrect because the sequence does not start with 15

B. is incorrect because the pattern increases by 5, not multiplied by 5

C. is correct because all of the even numbers in the pattern do end in 0

D. is incorrect because even numbers don't end in 5's

Hope this helps!

5 0
2 years ago
Read 2 more answers
What is if-then form
alex41 [277]
40)If any combo purchased then get a free milkshake

If "condition that must be met" then "wat happens when it is met"
7 0
3 years ago
X·|2x+5|+2x·|x-3|=35
VARVARA [1.3K]
You have the answer into the images.

8 0
3 years ago
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