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3 years ago

13

if nickle brass consists of 70% copper, 24.5% zinc and 5.5% nickel and the mass of the copper is 25.7Kg what is the total mass o

f all three materials

1 answer:

Dmitry [639]3 years ago

3 0

Answer:

36.71kg

Step-by-step explanation:

25.7 = .7x

x = 36.71kg

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mafiozo [28]

Answer:

-539.25

Step-by-step explanation:

(w^2x−3)÷10⋅z

w=−9, x = 2.7, and z=−25

((-9)^2*2.7−3)÷10⋅(-25)

Parentheses first

The exponent in the parentheses

(81*2.7−3)÷10⋅(-25)

Then multiply

(218.7−3)÷10⋅(-25)

Then subtract

(215.7)÷10⋅(-25)

Now multiply and divide from left to right

21.57*(-25)

-539.25

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2 years ago

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What is the equation for this line

pogonyaev

The equation of the line is $y=\frac{-1}{5} x-\frac{21}{5}$ .

Solution:

The points on the line are (–6, –3) and (4, –5).

$x_{1}=-6, y_{1}=-3, x_{2}=4, y_{2}=-5$

Slope of the line:

$$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

$$m=\frac{-5-(-3)}{4-(-6)}$

$$m=\frac{-5+3}{4+6}$

$$m=\frac{-2}{10}$

$$m=\frac{-1}{5}$

Point-slope formula:

$y-y_{1}=m\left(x-x_{1}\right)$

$$y-(-3)=\frac{-1}{5}(x-(-6))$

$$y+3=\frac{-1}{5}(x+6)$

$$y+3=\frac{-1}{5} x-\frac{6}{5}$

Subtract 3 from both sides of the equation.

$$y=\frac{-1}{5} x-\frac{21}{5}$

The equation of the line is $y=\frac{-1}{5} x-\frac{21}{5}$ .

6 0

3 years ago

Need help FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

vova2212 [387]

Answer:

Right angle 90 degrees is always going to be a right angle.

Step-by-step explanation:

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2 years ago

At 6:00 p.m. the temperature was –5°F outside. By midnight the temperature had dropped 12 degrees. What was the temperature at m

USPshnik [31]

-5 - 12 = -17

Starts at -5 degrees, then it drops another 12, so you subtract 12 from -5.

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2 years ago

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

Ad libitum [116K]

Answer:

11+2i=9

Step-by-step explanation:

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2 years ago

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