3 years ago

PLEASE HELP!!!!!!!!! Solve the equation showing all work. 7 + 14 = −21

Mathematics

1 answer:

scZoUnD [109]3 years ago

3 0

False -The equality is false because one side is positive and other is negative

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An alloy is composed of nickel, zinc, and copper in a ration of 7:2:9. How many kilograms of each metal are needed to make 3.6kg

motikmotik

Well, the short answer is, we divide that 3.6 by (7+2+9) and then we give as many pieces at the ratio to each, so let's do so,

$\bf \stackrel{nickel}{7}~~:~~\stackrel{zinc}{2}~~:~~\stackrel{copper}{9}
\\\\\\
\stackrel{nickel}{7\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{zinc}{2\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{copper}{9\cdot \frac{3.6}{7+2+9}}
\\\\\\
\stackrel{nickel}{7\cdot 0.2}~~:~~\stackrel{zinc}{2\cdot 0.2}~~:~~\stackrel{copper}{9\cdot 0.2}
\\\\\\
\stackrel{nickel}{1.4}~~:~~\stackrel{zinc}{0.4}~~:~~\stackrel{copper}{1.8}$

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3 years ago

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I really need help. What would be the slope-intercept equation?

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y = -3.71x + 147.25

Step-by-step explanation:

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A rectangle has a width of 24 inches and a height of 12 inches.

NARA [144]

Hello there.

What is the height of the second rectangle?

12.

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4 years ago

What is the slope of the line shown?<br> (0.4)<br> (54)

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Step-by-step explanation:

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The probability of drawing two red cards without replacement is 25/102 , and the probability of drawing one red card is 1/2 .

sergey [27]

Answer:

The probability of drawing a second red card, since the first card is red is 25/51

Step-by-step explanation:

The probability of drawing a second red card since the first Card is red is:

P (R2 | R1) = P (R2 and R1) / R1

So:

P (R2 | R1) = (25/102) / 1/2

P (R2 | R1) = 25/51

Therefore the correct option is option 2.

the probability of drawing a second red card, since the first card is red is 25/51

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4 years ago