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Anarel [89]
3 years ago
12

Tisha is training for a marathon. In February, she ran LIX miles for her training. In January, she was only able to run XV miles

. How many more miles did she run in February than in January?
A. 44
B. 34
C. 31
D. 29
Mathematics
1 answer:
kogti [31]3 years ago
8 0

Answer:

a

Step-by-step explanation:

smart

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Write an equation of the line that passes through (18, 2) and is parallel to the line 3y−x=−12
miskamm [114]

keeping in mind that parallel lines have the same exact slope, hmmmm what's the slope of the line above anyway?

\bf 3y-x=-12\implies 3y=x-12\implies y=\cfrac{x-12}{3}\implies y = \cfrac{x}{3}-\cfrac{12}{3} \\\\\\ y = \stackrel{\stackrel{m}{\downarrow }}{\cfrac{1}{3}}x-4\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}

so we're really looking for the equation of a line whose slope is 1/3 and runs through (18,2)

\bf (\stackrel{x_1}{18}~,~\stackrel{y_1}{2})~\hspace{10em} \stackrel{slope}{m}\implies \cfrac{1}{3} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{2}=\stackrel{m}{\cfrac{1}{3}}(x-\stackrel{x_1}{18}) \\\\\\ y-2=\cfrac{1}{3}x-6\implies y=\cfrac{1}{3}x-4

3 0
3 years ago
The figures are similar. Find x.
kipiarov [429]
6/9=x/21
x=21*6/9
=126/9
x=14
6 0
3 years ago
plz help quick. the sum of two numbers is 11. Three times the first number minus the second number is -3. what are the numbers?
Lerok [7]

Answer:

the first number is 2, the second number is 9 :)

Step-by-step explanation:

brainliest? :)

6 0
3 years ago
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Aleks04 [339]

Answer:

x = 4

Step-by-step explanation:

Cross multiply:

21*2 = 14(x - 1)

42 = 14x - 14

14x = 56

x = 4

8 0
3 years ago
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40x + 60 = 20. what does x equal?
Elena-2011 [213]

Subtract 60 on both sides to get -40.

You are left with 40x=-40

Divide both sides by 40 to leave x by itself.

You get x=-1.

7 0
3 years ago
Read 2 more answers
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