3 years ago

Evaluate the expression and enter your answer below. 4•3+13-3^2

Mathematics

1 answer:

Pepsi [2]3 years ago

3 0

If I’m not mistaken, 16

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A 26-foot long ladder is leaning against a building

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What is the probability that a respondent chosen at random is a male or a female?

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High grade steel consists of 85% iron and 15% magnese. Low grade steel consists of 67% iron and 33% mag ese. NASA orders 500 ton

Mamont248 [21]

Answer:

$361\dfrac{1}{9}$ tons of high steel and $138\dfrac{8}{9}$ tons of low steel

Step-by-step explanation:

Let x be the number of tons of high grade steel and y be the number of tons ow low grade steel needed.

In x tons of high grade steel there are

$0.85x$ tons of iron

$0.15x$ tons of magnese

In y tons of low grade steel there are

$0.67y$ tons of iron

$0.33y$ tons of magnese

NASA orders 500 tons of steel, so

$x+y=500$

and specifies that it must be in the proportion 80% iron and 20% magnese, so

$0.85x+0.67y=500\cdot 0.8\\ \\0.85x+0.67y=400$

From the first equation,

$x=500-y$

Substitute it into the second equation:

$0.85(500-y)+0.67y=400\\ \\425-0.85y+0.67y=400\\ \\-0.18y=-25\\ \\y=\dfrac{2,500}{18}=138\dfrac{8}{9}\ tons\\ \\x=361\dfrac{1}{9}\ tons$

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If m = 3 and b = 6, what is the correct equation of the line in slope intercept equation?

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Answer:

the equation would be y = 3x +6

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dude, I just got almost all of my points taken away from somebody that has 0 answers, 0 questions, and almost 2 million points..

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Answer:

Step-by-step explanation:

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