3 years ago

A bag contains 7 red marbles, 8 blue marbles and 4 green marbles. If three marbles

Mathematics

1 answer:

labwork [276]3 years ago

6 0

Answer:

answers is 19cscscsvss

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A square field has a perimeter of 48cm find the area of the field

BabaBlast [244]

Answer:

2,304

Step-by-step explanation:

u multiply one length by it widgth so 48 x 48

7 0

3 years ago

Read 2 more answers

What is the radius of a circle whose equation is x2 + y2 + 8x – 6y + 21 = 0?

s344n2d4d5 [400]

Answer:

2 units

Step-by-step explanation:

The given equation of the circle is:

$x^{2} + y^{2}+8x-6y+21=0$

The general equation of the circle is:

$x^{2} + y^{2}+2gx+2fy+c=0$

Comparing the given equation with the general equation we can say:

g = 4

f = -3

c = 21

The formula for radius of the circle is:

$radius=\sqrt{g^{2} +f^{2} -c }$

Using these values of the given circle, we get:

$radius=\sqrt{(4)^{2}+(-3)^{2}-21}\\\\radius=\sqrt{4}\\\\radius=2$

Therefore, the length of radius of the given circle is 2.

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3 years ago

Serena is making an experiment. For that, she needs 20 grams of a 52% solution of salt. She has two large bottles of salt water:

Fudgin [204]

X + y = 20 --> eqn 1
The second equation would be the mass balance shown below:
(x)(0.40) + y(0.70) = 20(0.52) --> eqn 2
Rearranging eqn 1,x = 20 - ySubstitute this to eqn 2:
(20 - y)(0.40) + y(0.70) = 20(0.52)Solve for y,y = 8 grams Finally, solve for x.x = 20 - 8 = 12 grams
Therefore, Serena needs 12 grams of the 40% solution and 8 grams of the 70% solution.

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3 years ago

Write the following polynomial in standard<br> form: <br><br> 4x+3-4x2-10x3

Ne4ueva [31]

Answer:

− 10 x ^3 − 4 x ^2 + 4 x + 3

Step-by-step explanation:

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3 years ago

HELP PLEASE!!!

Thepotemich [5.8K]

The answer is: 7/7

hope this helps :))

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3 years ago