All categories

2 years ago

(-4,r) (-8,3) m=5 Find r please!

Mathematics

1 answer:

viva [34]2 years ago

4 0

Answer:

r = 23

Step-by-step explanation:

m = (y2 - y1)/(x2 - x1)

5 = (3 - r)/(-8 - (-4))

5 = (3 - r)/(-8 + 4)

3 - r = 5 × -4

3 - r = -20

-r = -23

r = 23

You might be interested in

The cheerleading squad is making posters. They have 3 different colors of poster board and 4 different colors of markers. How ma

satela [25.4K]

12 different boards can be made
1 marker can go on 3 different posters and their are 4 markers so 3 times 4 equals 12

3 0

2 years ago

Can You guys help me on these problems

klio [65]

Answer:

5=100

6=900

8=375

Step-by-step explanation:

LxWxH

20x4

300x3

5x5=25 x 15= 375

4 0

2 years ago

What would be the volume of (a) air (b) plastic in a ball with 25cm diameter made from plastic 2mm thick?

morpeh [17]

Answer:

Part a) The volume of the air is $V=7,794.78\ cm^{3}$

Part b) The volume of the plastic is $V=386.45\ cm^{3}$

Step-by-step explanation:

we know that

The volume of the sphere is equal to

$V=\frac{4}{3}\pi r^{3}$

step 1

Find the volume of the complete ball (air +plastic)

we have

$r=25/2=12.5\ cm$ ------> the radius is half the diameter

substitute

$V=\frac{4}{3}\pi (12.5)^{3}$

$V=8,181.23\ cm^{3}$

step 2

Find the volume of the air

we have that

The plastic is 2 mm thick

Convert to cm

2 mm=2/10=0.2 cm

The radius of the interior of the ball is

$r=12.5-0.2=12.3\ cm$

substitute

$V=\frac{4}{3}\pi (12.3)^{3}$

$V=7,794.78\ cm^{3}$ -----> this is the volume of the air (interior of the ball)

step 3

Find the volume of the plastic

we know that

The volume of the plastic is equal to the volume of the complete ball minus the volume of the air

$8,181.23\ cm^{3}-7,794.78\ cm^{3}=386.45\ cm^{3}$

3 0

2 years ago

Read 2 more answers

Translate the sentence into an equation. Twice the difference of a number and 2 equals 9 . Use the variable y for the unknown nu

xxMikexx [17]

Since difference is subtraction, that means that y-2=9 and by adding 2 to both sides we get y=11

8 0

2 years ago

Evan's family drove to a theme park for vacation. They drove the same speed throughout the trip. The first day, they drove 300 m

Lelu [443]

Answer:

150 miles

Step-by-step explanation:

Find the unit rate (MPH) by dividing miles travlled by hours.

300/6 = 50 MPH

250/5 = 50 MPH

Multiply the hours on day 3 (3) by 50 MPH

3*50 = 150 miles

5 0

3 years ago

Read 2 more answers