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3 years ago

6

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% gal

ena by mass. If the lead can be extracted with 92.5 % efficiency, what mass of ore is required to make a lead sphere with a
6.50cm radius?

1 answer:

r-ruslan [8.4K]3 years ago

6 0

Answer:

ds hj bfsj gjhbyuabfdbsybfy

Step-by-step explanation:

sdbhabjbgfybsbfsad gfhysabfubdfr

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Find the coefficient of mt in the expansion of 4m(3n-2t)+3t(3t-2m)

Drupady [299]

Answer:

-14

Step-by-step explanation:

12mn-8mt+9t²-6mt

12mn+9t²-14mt

the coefficient of mt is -14

4 0

3 years ago

Solving algebraic equationsSolve:1/5m = 4 - 3/10m

sertanlavr [38]

EXPLANATION

Given the equation:

1/5m = 4-3/10m (Adding +3/10 to both sides)

1/5m +3/10m = 4 (Adding 1/5 + 3/10)

1/2m = 4 (Isolating m)

m = 2*4 (Multiplying)

m=8

ANSWER: m=8

3 0

1 year ago

Which equation is equivalent to the given equation? 7m+11=-4(2m+3)

Vladimir [108]

Answer/Step-by-step explanation:

7m + 11 = -4(2m + 3)

<u>Use distributive property:</u>

7m + 11 = -8m - 12

<em>Therefore the equations are equivilent!</em>

<h2><u><em>Will gladly take Brainliest, please!!!</em></u><em> =D</em></h2>

8 0

3 years ago

1. Jack is 30 years old and Alice is 35 years old. What percent of Alice's age is Jack, rounded to the nearest tenth of a percen

Firlakuza [10]

The answer would be 57percent

4 0

3 years ago

On August 20, 1989, in Cologne, West Germany, Said Aouita of Morocco also established a world record when he ran the 3000. m run

zalisa [80]

Answer:

Average speed of Aouita = 6.68 meter per second.

Step-by-step explanation:

To create a world record Aouita ran a distance = 3000 m

He took the time to cover this distance = 7 minutes 29.45 seconds

= (7×60) + 29.45 seconds

= 449.45 seconds

Since, formula for the average speed is given by,

Average speed = $\frac{\text{Total distance covered}}{\text{Total time taken}}$

Therefor, average speed of Aouita = $\frac{3000}{449.45}$

= 6.675

≈ 6.68 meter per second

Average speed of Aouita was 6.68 meter per second.

8 0

3 years ago