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2 years ago

7

Write an equation of the line that passes through a pair of points:

2 answers:

inn [45]2 years ago

6 0

Answer: (b)

Step-by-step explanation:

the y-intercept is -3.

the slope of the line is 1x, also known as x.

Vladimir79 [104]2 years ago

4 0

Answer:

y=1x-3

Step-by-step explanation:

find the point where the line crosses the y axis, in this case it would be -3. next, find the next point where the line directly crosses a spot on the graph, this would be 3 on the x axis. find how many squares on the graph it took to get there, it would be up 3 and right 3, this would make it 3/3x, or just 1x. your equation is y=1x-3

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6. Two points in the plane, ????(19,4) and ????(19,−6), represent the endpoints of the diameter of a circle.

dusya [7]

Answer:

Radius = 5

center is (19,-1)

$(x-19)^2(y+1)^2= 25$

Step-by-step explanation:

Two points in the plane, (19,4) and (19,−6), represent the endpoints of the diameter of a circle.

Distance between the points is calculated using formula

$d=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}$

$=\sqrt{\left(19-19\right)^2+\left(-6-4\right)^2}=10$

diameter = 10

radius = diameter divide by 2

Radius = 5

midpoint is the center of the circle

$\left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)$

$\left(\frac{19+19}{2},\:\frac{-6+4}{2}\right)$

(19,-1)

Equation of the circle

$(x-h)^2(y-k)^2= r^2$

h,k is the center and r is the radius

h=19 and k=-1 , r=5

$(x-19)^2(y+1)^2= 25$

8 0

2 years ago

Florence looked at her school lunch account and realized it was –$10.83. Which statement accurately explains the value in her ac

Rudik [331]

Answer:

Step-by-step explanation:

A

3 0

2 years ago

If a sphere’s radius is quadrupled, what is the corresponding change in the volume?

vovangra [49]

The volume is proportional to the cube of the radius:
4^3=64
The volume will be 64 times the original value!

6 0

2 years ago

What is the area of a section of pavement that is 20 ft wide and 70 yd long?

myrzilka [38]

Answer:

A = 4200 ft^2

Step-by-step explanation:

We know the formula for area is

A = l*w

We need to have the same units

convert yd to ft

1 yd = 3ft

Multiply each by 70

70 yds = 210 ft

A = 210 *20

A = 4200 ft^2

6 0

3 years ago

2/3 divided by 7/12<br> PLSLSLSLSLSLLSLSL

GarryVolchara [31]

Answer:

0.00793650794 or 8/7 in fraction form

Step-by-step explanation:

Find the reciprocal of the divisor

5 0

2 years ago