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S_A_V [24]
2 years ago
14

I WILL MARK YOU BRAINLIEST!

Mathematics
2 answers:
AveGali [126]2 years ago
5 0

Answer:

C. 12 inches

Step-by-step explanation:

The height of the scale model in inches is 12 .

guajiro [1.7K]2 years ago
3 0

Answer:

the answer is 12 inches

every inche equals 15 feet from 30/2 then divide it by the total 180/15 which equals 12

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How many solutions are there for the system x^2+4y^2=100 and 4y-x^2=-20
never [62]
There are 5 solutions for this system.

x^2 + 4y^2 = 100  ____1
4y - x^2 = -20  ____2
Add both 1 & 2 together. x^2 gets cancelled
4y^2 + 4y = 80   (send 80 to the other side and divide by 4)
Then equation the becomes : y^2 + y -20 =0
Now factorise the equation: (y+5) (y-4) = 0
Solve for y :  y = -5 and y = 4
Using the values of y to find the values of x. From equation 1:
x^2 = 100 - 4y^2    x = /100 - 4y^2  (/ means square root) Replace values of y
y = -5, x = /100 - 4(-5)^2 = /100 - 100 = 0
y = 4, x = /100 - 4(4)^2 = / 100 - 64 = /36 = -6 or 6
Thus we have 6 solutions y = -5, 4 and x = -6, 0, 6
6 0
3 years ago
it costs $31.28 to fill your gas tank, which holds 16 gallons. find the price per gallon to fill your gas tank.
tia_tia [17]

Answer:

1.955

Step-by-step explanation:

$31.28 ÷ 16 = 1.955

5 0
2 years ago
Which technique is most appropriate to use to solve each equation drag the name of the technique into the boxing match each equa
alina1380 [7]

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week mo naman salamat sa points

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Help me<br> I don’t remember how to find volume
Vika [28.1K]

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Step-by-step explanation:

Because it's a triangular prism and the base times height makes a rectangular prism, a triangle is half of a rectangle

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