Please help me this is a Math 3 post test really important last day of the quarter

Answer:

(x, y) = (8, -2)

Step-by-step explanation:

Substitute:

3(-4y) + 2y = 20

-12y + 2y = 20

-10y = 20

y = -2

x = -4(-2) = 8

Answer:

Step-by-step explanation:

Answer:

Area of circle A =113.14 mm²

Area of circle b = 314.29 mm²

Area of circle C = 452.57 mm²

Area of circle A = 254.57 mm²

2.25 times

Step-by-step explanation:

Area of a circle = nr²

where n = 22/7

r = radius

Circle A's radius = 6mm

Circle B's radius = 6mm + 4mm = 10mm

Circle C's radius = 10mm + 2mm = 12mm

Circle D's radius = 12mm - 3mm = 9mm

Area of circle A = (22/7) x 6² = 113.14 mm²

Area of circle b = (22/7) x 10² = 314.29 mm²

Area of circle C = (22/7) x 12² = 452.57 mm²

Area of circle A = (22/7) x 9² = 254.57 mm²

Number of times the area of circle D is greater than that circle A = Area of circle D / Area of circle A

254.57 mm² / 113.14 mm² = 2.25 times

Answer:

I think it's B, the range is 70 in the mid-range is 50

Answer:

62.8

Step-by-step explanation:

Answer:

Step-by-step explanation:

-3+7=4

x=4

Answer:

K=3

Step-by-step explanation:

Since when you divide 42÷3 you tend to get 14.

Answer:

function b

Step-by-step explanation:

When its asking for which function has a greater rate of change its asking for which slope has a greater value

the slope is calculated by change in y over change in x

for function a, as y goes up 2 x goes up 1

so the slope ( rate of change) is 2/1

for function b is y goes up 3 x goes up 1

so the slope (rate of change) is 3/1

3/1 is greater than 2/1 so function b has a greater rate of change

Answer:

4:7 i think, bc its books to pencils so books go first, which is 4, put the ratio sign, then 7

Answer:

I don't know i just want some points but to be honest i think you have to divide 40 by 30 then multiply by 100.

Step-by-step explanation:

hope this helps but try and work it out.

Answer:

6

Step-by-step explanation:

use the formula of slopes

[tex] = \frac{y2 - y1}{x2 - x1} \\ = \frac{32 - 8}{1 - ( - 3)} \\ = \frac{24}{4} \\ = 6[/tex]

Answer:

[tex]\frac{31 }{11 }[/tex]

Step-by-step explanation:

The formula to solve this is: [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]. In this case, the expression would be: [tex]\frac{32 -1 }{8 -(-3) }[/tex] or [tex]\frac{32 -1 }{8 +3 }[/tex]. This is also [tex]\frac{31 }{11 }[/tex].

Hope it helps and is correct!

Answer:

The train travels 75 mph.

Step-by-step explanation:

Hope this helps!

Answer:

(75, 1)

Step-by-step explanation:

One way we can figure out how fast the train goes, is bylooking at what we have. We know that the train travels 450 miles in 6 hours. When we divide, we get 75. So, we know that the train is going at 75 miles per hour. We can check our work by looking at the second relationship on there. When 675 is divided by 9, we get 75. So for every hour, the train travels 75 miles.

I hope that this helps you out :)

Answer:

It is D

Step-by-step explanation:

Answer:

graph ????

Step-by-step explanation:

Answer:

to be honest I dont know I'm not that good at math....

Answer:

The answer is (A) The sum of x and y is a rational number.

Answer:

95 points

Step-by-step explanation:

Let P = Big Town's points

5/2 = P/38

2P = 190

P = 95 points

Step-by-step explanation:

When he retired in 1997 his card was worth ​$4.51 The value has increased by ​$1.02 each year since then.

Express the relationship relating the value of the card y in dollars and the number of years x

y = $1.02 x + $4.51

Is the relationship between x and y​ proportional?

Yes. This is because as  x increases, the value of y also increases.

What was the value of the card in ​2008?

Number of years from 1997 to 2008 = x = 11

y = $1.02 x + $4.51

y = $1.02 (11) + $4.51

y = $ 11.22  + $4.51

y = $ 15.73

Answer:

To receive 1 foot of snow it will take about 18 hours.

Step-by-step explanation:

Given that a city receives 2 inches of snowfall every 3 hours, to write and graph a function that describes the relationship and determine how long does it take to receive 1 foot of snow, the following calculation must be performed:

1 foot = 12 inches

(12/2) x 3 = X

6 x 3 = X

18 = X

Thus, to receive 1 foot of snow it will take about 18 hours.

Answer:−3r−7

Step-by-step explanation:

I got it of the web.

Answer:

here

Step-by-step explanation:

16 karat gold is 16 parts gold to 8 parts other material for a pure gold percentage of 67%.

Answer:

About 67% because karats are on a scale of 1-24 with 24 being pure gold,

so 16/24.

ASA

Angle-Side-Angle

AAS is the same but the order in different.

SAS is a no because there are no two S.

Can't determine bah! You can determine.

PLEASE BRAINLIEST

Answer:

The markings are different.

SAS and ASA would work, as you can count the sides and angles respectively, however, the markings are different, so I am not sure.

Actually I was wrong. Please give the other person credit.

Answer:

(11m-4)

Step-by-step explanation:

8m+3m=11m

6-2=4

Answer:

90%

2 is 10%

20-2=18

90% left.