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Pepsi [2]
2 years ago
8

I’ll give brainliest pls do all 3

Mathematics
2 answers:
Phoenix [80]2 years ago
6 0

9:0.2

i will do 8 c7. 7 and 8 will take 30 min i will do ot now wait

fgiga [73]2 years ago
6 0

Answer:

Step-by-step explanation:

7.

Speed = Distance / time

Distance is fixed so speed x time = constant

speed1 x time1 = speed2 x time2

speed1/speed2 = time2/time1

speed1/speed2 = 20/27

time2/time1 = 20/27

Percentage decrease in time = (time1 - time2)/time1 x 100%

= (1 - time2/time1) x 100%

= (1 - 20/27) x 100%

= 7/27 x 100%

= 25.9%

8.

Let the equation of the angle bisector be y = mx + C

It is the angle bisector so its slope, m, is half way between slope of the two lines:

y = 2; slope = 0

y = 4x - 2; slope = 4

So m = (0 + 4) / 2 = 2

y = 2x + C

It is the angle bisector so the line must pass through intersection of the two lines:

y = 2 and y = 4x - 2

4x -2 = 2

x = 1

Intersection point is at x = 1 and y = 2

Substitute back into y = 2x + C

2 = 2(1) + C

C = 0

So the equation is y = 2x

9.

\sqrt{\frac{1}{25} } \\= \frac{\sqrt{1}}{\sqrt{25}} \\= \frac{1}{\sqrt{5^{2}}} \\\\

= 1/±5

= ±1/5

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Answer:

Step-by-step explanation:

Equation of the line y = mx + c

The new line is perpendicular to 2x - 3y = -5

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Since the lines are perpendicular to each other : m_{1} . m_{2} = -1

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Slope of the given line

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Slope of the new line

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The equation to the new line passing through (-4, -3) and perpendicular to 2x - 3y = -5

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8 0
3 years ago
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<em>Cancel 33x on both sides</em>

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arc length formula

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William is digging a hole to plant a tree.The hole has to be in 2 ft deep.He is able to dig at a rate of 1/2 ft. per minute.Writ
Mars2501 [29]

Answer:

y=-\dfrac{1}{2}x+2

Step-by-step explanation:

Let

x = the amount of time William has been digging

y = the amount he has left to dig

The hole has to be in 2 ft deep. This means when William starts, the hole was 0 feet deep and has left 2 ft to dig. Hence, y-intercept is b=2

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The slope-intercept form of the equation is y=mx+b, so in your case this equation is

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