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3 years ago

5

Please help! I put a screenshot :) I would like a detailed answer please :) 55 points :)

2 answers:

xxMikexx [17]3 years ago

8 0

A: 19 - -12= 31
B: the absolute value is the difference any number (positive or negative) that number is away from zero so add 12 to 19 to get 31 as well

seropon [69]3 years ago

6 0

Method A: If we count, we see that the answer is 31.

Method B: 19 - -12 = 31. We can even do -12 - 19 and we'll get the same answer: -31, and the absolute value of -31 is 31.

Both methods will give you the same answer.

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Please help on number 15

borishaifa [10]

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6 0

2 years ago

Can someone help me with this please?

Daniel [21]

Answer:

Classify by angles: <u>Equiangular</u>

Classify by sides: <u>Equilateral</u>

Step-by-step explanation:

An equiangular triangle has angles that all measure 60 degrees. An equilateral triangle is a triangle that has sides will all of the same lengths. This triangle meets both of these requirements.

Hope it helps!

5 0

2 years ago

A spherical balloon is inflated so that its volume is increasing at the rate of 3 ft3/min. How fast is the diameter of the ballo

beks73 [17]

When an spherical balloon volume is increasing at the rate of $3ft^3/min$ then the diameter of the balloon is increasing $\frac{3}{2\pi }ft /min$

How can we find the rate of change of balloon's diameter ?

The volume of a spherical balloon is $v=\frac{4}{3} \pi r^3$

In form of diameter we can write as

$v=\frac{4}{3} \pi (\frac{D}{2} )^3\\=\frac{1}{6} \pi D^3$

Now we will differentiate both sides wrt to $t$ we get

$\frac{dv}{dt} =\frac{1}{6} \pi 3D^2 \frac{dD}{dt} \\\frac{dD}{dt} =\frac{2}{\pi D^2} \frac{dv}{dt} \\\\when r=1\\D=2ft$

Given in the question $\frac{dv}{dt} =3ft^3/min$

thus when we substitute the values we get

$\frac{dD}{dt} =\frac{2}{\pi *2^2} (3)\\\frac{dD}{dt}=\frac{3}{2\pi } ft/min$

Learn more about the differentiation here:

brainly.com/question/28046488

#SPJ4

3 0

1 year ago

I need the answer fore both plsss

grandymaker [24]

Answer: 6i) 6a² - 2ab

6ii) -2b³

6iii) b³ + 7b² - 49b

<u>Step-by-step explanation:</u>

6i) (a + b)(5a - 3b) + (a - 3b)(a - b)

= 5a² - 3ab + 5ab - 3b² + a² - ab - 3ab + 3b²

= 5a² + 2ab - 3b² + a² - 4ab + 3b²

= 6a² - 2ab

6ii) (a - b)(a² + b² + ab) - (a + b)(a² + b² - ab)

= a³ + ab² + a²b - ab² - a²b - b³ - (a³ + ab² - a²b -ab² + a²b + b³)

= a³ - b³ - (a³ + b³)

= a³ - b³ - a³ - b³

= -2b³

6iii) (b² - 49)(b + 7) + 343

= b³ + 7b² - 49b - 343 + 343

= b³ + 7b² - 49b

You are allowed a maximum of 3 questions.

Please post #7 on a different question.

5 0

2 years ago

For The Night (feat. Classe

jeka94

The scale for the model length of the fuselage obtained by taking the ratio of the model length and the actual length is 0.125

Actual Length of fuselage = 170 feets

Length of fuselage on model = 21.25

<u>To obtain the scale of the model, we take the ratio of the model length and the actual length</u> :

Model length / Actual length

21.25 feets / 170 feets = 0.125

Therefore, the scale for the model length of the fuselage is 0.125

Learn more :brainly.com/question/18796573

3 0

2 years ago