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Dimas [21]
3 years ago
9

4 bags of cement do 18m2, how many m2 can be done with 7 bags?

Mathematics
1 answer:
Art [367]3 years ago
5 0

Answer:

You would get 31.5 square meters.

Step-by-step explanation:

To find this, set up a proportion of the amount the first can make and the amount the second can. Use x for the unknown quantity.

4/18 = 7/x

Now cross multiply to solve.

7*18 = 4*x

126 = 4x

31.5 = x

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Solve using the square root property.X^2=-12
Alla [95]

Answer:

x = ± 2i\sqrt{3}

Step-by-step explanation:

note that \sqrt{-1} = i

x² = - 12 ( take square root of both sides )

x = ± \sqrt{-12} = ± \sqrt{4(3)(-1)} = ± 2i\sqrt{3}

5 0
2 years ago
Play help due tomorrow
IgorC [24]
D. 42/8

You can get this by adding the blueberry and banana amounts together. Then multiply by 6. 
5 0
3 years ago
Use the discriminant to describe the roots of each equation. Then select the best description. 3x2 - 10 = 0. A) Double root B) R
Mademuasel [1]

1. discriminant = b^2 - 4ac = (-5)^2 - (4 x 1 x 7) = 25 - 28 = -3  [imaginary root]


2. discriminant = (-5)^2 - (4 x 1 x -4) = 25 - (-16) = 25 + 16 = 41  [real and irrational root]


3. discriminant = (8)^2 - (4 x 16 x 1) = 64 - 64 = 0    [double root]


Read more on Brainly.com - brainly.com/question/1698047#readmore




hope it helps

4 0
3 years ago
Read 2 more answers
With
Hatshy [7]
<span>y - 2418.6 = 5.9(x - 54)
y - 2418.6 = 5.9x - 318.6
y = 5.9x + 2100 
f(x) = 5.9x + 2100 (this is our function)
.
Now we can answer:
What is the weight of the plane with 26 gallons of fuel in its tank? 
f(26) = 5.9(26) + 2100 = 2253.4 pounds 
 (Put me as brainiest!!!! <3)</span>
3 0
3 years ago
PLEASE HELP 40 POINTS!!!
pshichka [43]

Answer:

it seas 40 points but its only 20

Step-by-step explanation:

;-;

7 0
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