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3 years ago

ILL GIVE BRAINELST PLZ HELP FAST!!!

Mathematics

1 answer:

Rasek [7]3 years ago

7 0

Answer:

Hello. Let me explain.

Step-by-step explanation:

For the first question.

$m = \frac{y2 - y1}{x2 - x1 } = \frac{8 - ( - 6)}{ - 3 - 4} = \frac{14}{ - 7} = - 2$

For the second question.

$y - y0 = m(x - x0) \\ y + 6 = - 2(x - 4) \\ y = - 2x + 8 - 6 \\ y = - 2x + 2$

So b is +2

Hope you understand

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X equals 125 and y equals 55

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2 years ago

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2 years ago

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If ABCD is a square where A(-4;2) B(-2;-1) C(1;1) , determine the coordinates of of D

larisa86 [58]

Answer:

(4;-1)

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A(-4;2)

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2 years ago

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The total of 3 suitcases is 127 lb. The gray suitcase weighs 11 lb more than the pink suitcase. The pink suitcase weighs 5 lb th

Gnoma [55]

If the gray suitcase weighs 11 lb more than the pink suitcase, the pink suitcase weighs 5 lb than the blue suitcase, and the total of 3 suitcases is 127 lb, then the blue suitcase weighs 35.3 lb

Let the gray suitcase be represented by g

Let the pink suitcase be represented by p

Let the blue suitcase be represented by b

The gray suitcase weighs 11 lb more than the pink suitcase

g = p + 11........(1)

The pink suitcase weighs 5 lb than the blue suitcase.

p = b + 5

b = p - 5...........(2)

Total of 3 suitcases = 127 lb

p + b + g = 127............(3)

Substitute equations (1) and (2) into equation (3)

p + p - 5 + p + 11 = 127

3p + 6 = 127

3p = 127 - 6

3p = 121

p = 121/3

p = 40.3 lb

Substitute p = 40.3 into equation (2)

b = p - 5

b = 40.3 - 5

b = 35.3

The blue suitcase weigh 35.3 lb

Learn more here: brainly.com/question/11865047

7 0

2 years ago

A metalworker has a metal alloy that is 20% copper and another alloy that is 60% copper. How many kilograms of each alloy shou

puteri [66]

<h3>Answer:</h3>

<u>20</u> kg of 20%
<u>80</u> kg of 60%

<h3>Step-by-step explanation:</h3>

I like to use a little X diagram to work mixture problems like this. The constituent concentrations are on the left; the desired mix is in the middle, and the right legs of the X show the differences along the diagonal. These are the ratio numbers for the constituents. Reducing the ratio 32:8 gives 4:1, which totals 5 "ratio units". We need a total of 100 kg of alloy, so each "ratio unit" stands for 100 kg/5 = 20 kg of constituent.

That is, we need 80 kg of 60% alloy and 20 kg of 20% alloy for the product.

_____

<em>Using an equation</em>

If you want to write an equation for the amount of contributing alloy, it works best to let a variable represent the quantity of the highest-concentration contributor, the 60% alloy. Using x for the quantity of that (in kg), the amount of copper in the final alloy is ...

... 0.60x + 0.20(100 -x) = 0.52·100

... 0.40x = 32 . . . . . . . . . . .collect terms, subtract 20

... x = 32/0.40 = 80 . . . . . kg of 60% alloy

... (100 -80) = 20 . . . . . . . .kg of 20% alloy

6 0

3 years ago