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notsponge [240]
3 years ago
10

If a • b = b, what must the value of a be?

Mathematics
1 answer:
Usimov [2.4K]3 years ago
6 0

Answer:

the value of a would be one, i think

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The position of an open-water swimmer is shown in the graph. The shortest route to the shoreline is one that is perpendicular to
Stolb23 [73]

Answer:

Step-by-step explanation:

To define the perpendicular line we need to first know the slope of the reference line graphed.

m=(y2-y1)/(x2-x1) we have points (0,5) and (2,1)

m=(1-5)/(2-0)

m=-4/2

m=-2

For lines to be perpendicular their slopes must satisfy

m1m2=-1, we have a line with a slope of -2 so

-2m=-1

m=1/2, so our perpendicular line is so far

y=x/2+b, it must have point (3,2) so we can solve for b

2=3/2+b

b=1/2, so the swimmer will travel along the line

y=x/2+1/2

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Bridget buys a pair of shoes that cost $89.99. She has a coupon for 30% off. How much does she pay for the shoes?
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Step-by-step explanation:

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geniusboy [140]

Answer:

x=7 is the line parallel to the given line x=8 . Parallel lines are the lines which are always same distance apart and never intersect. The given line is x=8 with intersects the x axis at x=8 and it is parallel to y axis with slope infinite or not defined.

Step-by-step explanation:

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6.<br> 5x – 2y = 17<br> 2x + 3y = 3<br><br> How do i do elimination on this problem.
kolbaska11 [484]

Answer:

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The point form is (3,-1)

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Write the slope-intercept form of the equation of the line through thr given point with the given slope.
dimaraw [331]

\bf (\stackrel{x_1}{-4}~,~\stackrel{y_1}{0})\qquad \qquad \qquad  slope =  m\implies -\cfrac{1}{3} \\\\\\ \stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-0=-\cfrac{1}{3}[x-(-4)] \\\\\\ y=-\cfrac{1}{3}(x+4)\implies y=-\cfrac{1}{3}x-\cfrac{4}{3}

8 0
4 years ago
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