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4 years ago

Working together, Jacob and Kristin can

Mathematics

1 answer:

Wewaii [24]4 years ago

6 0

Answer:

15 minutes

Step-by-step explanation:

Their rate together is 1/6 floor per minute.

Her rate alone is 1/10 floor per minute.

His rate is the difference of these:

1/6 - 1/10 = 5/30 -3/30 = 2/30 = 1/15 . . . . floor per minute

It would take Jacob 15 minutes to do it alone.

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Write the slope-intercept form of the equation that passes through the point (-3, 5) and is perpendicular to the line y = 1/5x +

aleksley [76]

Answer:

Step-by-step explanation:

$\text{Let}\\\\k:y=m_1x+b_1\\\\l:y=m_2x+b_2\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\l\ \parallel\ k\iff m_1=m_2\\\\=========================$

$\text{We have}\ y=\dfrac{1}{5}x+10\to m_1=\dfrac{1}{5}\\\\\text{Therefore}\ m_2=-\dfrac{1}{\frac{1}{5}}=-5.\\\\\text{Put the value of a slope and the coordinates of the point (-3, 5)}\\\text{to the equation}\ y=mx+b:\\\\5=-5(-3)+b\\5=15+b\qquad\text{subtract 15 from both sides}\\-10=b\to b=-10\\\\\text{Finally:}\\\\y=-5x-10$

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3 years ago

It is estimated that 7 out of 10 people invited to a wedding will attend. If Mark and Katie invite 120 people, how many should t

Margarita [4]

7 and 10 is half

so we expect the people come to wedding half of 120÷2=60 people

i just try

5 0

3 years ago

what is the image of the point ( -4, 8) after a rotation of 90° counterclockwise about the origin

lesya [120]

Answer:(-8,-4)

Step-by-step explanation:

5 0

3 years ago

X - 2y + 2z = -22 <br> x + 3y - z = 03 <br> x + 2y + 3z = -15

scZoUnD [109]

What is your question?

7 0

3 years ago

Someone help me with this. I forgot my notes in class

Nonamiya [84]

Answer:

see explanation

Step-by-step explanation:

Since AB = BC the the triangle is isosceles and thus

∠ A = ∠ C = 8x

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180

44x + 8x + 8x = 180, that is

60x = 180 ( divide both sides by 60 )

x = 3

Thus

∠ A = ∠ C = 8x = 8(3) = 24°

∠ B = 44x = 44(3) = 132°

6 0

3 years ago

Read 2 more answers