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2 years ago

15 POINTS AND BRAINLIEST ANSWER!!

Mathematics

2 answers:

lisov135 [29]2 years ago

6 0

Copper: density ≤ 3.4
Iron: density=2.26

Before: 200 t
After: 800 t

Ede4ka [16]2 years ago

3 0

Answer:

density of iron is 7.8g/cm cubed

density of copper is 8.3g/cm cubed

Step-by-step explanation:

density =mass/volume

You might be interested in

What is equivalent to 31/50 in fraction form

tigry1 [53]

$\frac{31}{50} = \frac{31}{50} \times \frac{2}{2} =\boxed{\bf{ \frac{62}{100} }}$

62/100 is equivalent to 31/50.

6 0

3 years ago

2a + 3b = 5<br> b = a - 5

Lunna [17]

<h2>1st Equation:</h2>

Answer for A:

$a = \frac{5 - 3b}{2}$

Answer for B:

$b = \frac{5 - 2b}{3}$

<h2>2nd Equation:</h2>

Answer:

$a = b + 5$

<u>hope it helps</u><u>.</u>

5 0

2 years ago

Sherry was in charge of distributing 25 food items that were donated to the local food pantry. on moday she distributed 8 items

creativ13 [48]

Answer:

Step-by-step explanation:

First you add up all the numbers - 8+7+5=20

Then you know 5 is 1/5 of 25

You know 5+5+5+5=20

ANSWER - 4/5

3 0

2 years ago

Find the equation of the line passing<br> through the points (2, 1) and (5, 10).<br> y = [? ]x + [ ]

sladkih [1.3K]

Answer:

$y=3x-5$

Step-by-step explanation:

$m=10-1/5-2$

$m=9/3$

$m=3$

$y=3x+b$

$x=2, y=1$

$1=3(2)+b$

$1=6+b$

$-5=b$

$y=3x-5$

8 0

2 years ago

The random variable X~(30,2^2) <br> Find p(X<33) <br> Find p(X>26)

Ostrovityanka [42]

Answer:

i) P(X<33) = 0.9232

ii) P(X>26) = 0.001

Step-by-step explanation:

Given that the mean of the Population = 30

Given that the standard deviation of the Population = 4

Let 'X' be the Normal distribution

Given that the random variable X = 33

$Z = \frac{x-mean}{S.D}$

$Z = \frac{33-30}{2} = 1.5$ >0

P(X<33) = P( Z<1.5)

= 1- P(Z>1.5)

= 1 - ( 0.5 - A(1.5))

= 0.5 + 0.4232

P(X<33) = 0.9232

Given that the random variable X = 26

$Z = \frac{x-mean}{S.D}$

$Z = \frac{33-26}{2} = 3.5$ >0

P(X>26) = P( Z>3.5)

= 0.5 - A(3.5)

= 0.5 - 0.4990

= 0.001

P(X>26) = 0.001

5 0

2 years ago