2 years ago

When subtracting polynomials,distribute the negative sign,then add.

Mathematics

1 answer:

Doss [256]2 years ago

5 0

Answer:

7m^2 - 11m - 2

Step-by-step explanation:

Subtract (-3m^2 + 10m + 4) from 4m^2 - m + 2:

4m^2 - m + 2

- (-3m^2 + 10m + 4) Now distribute the negative sign:

4m^2 - m + 2

+ 3m^2 - 10m - 4

--------------------------

7m^2 - 11m - 2 is the final answer.

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What is the mass of a solid ball of iron with a radius equal to 18 cm if it is known that the density of iron is 7800 kg/m

Shtirlitz [24]

Answer:

60.6528 kg

Step-by-step explanation:

Assuming the solid ball of iron is a sphere with a radius of 18 cm (or 0.18 m), we can compute the volume of the sphere:

$V=\frac{4}{3}\pi r^3\\\\V=\frac{4}{3}\pi (\frac{18}{100})^3\\\\V=\frac{4}{3}\pi (0.005832)\\\\V=0.007776$

Therefore, the volume of the solid ball is 0.007776 m³

Since we know that density is mass/volume, then we can find the mass of the iron:

$\rho=\frac{mass}{volume}\\ \\7800\: kg/m^3=\frac{mass}{0.007776\: m^3}\\\\mass=60.6528\:kg$

Thus, the mass of the solid ball of iron is 60.6528 kg

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2 years ago

Can someone help me out with this problem ?

expeople1 [14]

I believe that’s it .... i’m so so sorry if it’s not

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2 years ago

“Drew has 50 red, green, and blue marbles. He has six more red marbles than blue marbles and four fewer green marbles than blue

kolezko [41]

(1) R+G+B=50
(2) R=B+6
(3) G=B-4 so substitute G in (1)
R+B-4+B=50 substitute (2) in here
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3B+2=50
3B=50-2
B=48/3=16 substitute in (2) and (3)
R=16+6=22
G=16-4=12
Check
22+12+16=50✅

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2 years ago

A graph of the whole numbers is drawn on the number line. Which of the following points is not included on the graph? A. -1) B.

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gizmo_the_mogwai [7]

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Step-by-step explanation:

all angles together is 180. p=70 degrees and q = 70 degrees

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1 year ago