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3 years ago

7

a right triangle has the coordinates a(6,0), b(0,0) and c(0,8). what is the perimeter of the triangle

1 answer:

Mrac [35]3 years ago

8 0

Answer:

28

Step-by-step explanation:

sry if I'm wrong although I used calculator

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What is the graph of the equation y = - 4*+<br> X 2?

3241004551 [841]

if you use the desmos graphing calculator - since you didn't provide answer choices - it should be able to help you.

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2 years ago

How many pounds of a 15% copper alloy must be mixed with 700lb of a 30% copper alloy to maybe a 25.5% copper alloy

lisov135 [29]

Answer:

$300\; \rm lb$ .

Step-by-step explanation:

Let $x$ represent the mass (in pounds) of that $15\%$ copper alloy required, such that the final mixture would contain $25.5\%$ copper by mass.

Consider: if $x$ pounds of that $15\%$ copper alloy is mixed with $700$ pounds that $30\%$ copper alloy, what would be the mass of copper in the mixture?

Mass of copper in $x$ pounds of that $15\%$ copper alloy: $(0.15\, x)\; \rm lb$ .
Mass of copper in $700$ pounds of that $30\%$ copper alloy: $700 \times 0.30 = 210\; \rm lb$ .

Therefore, the mixture would contain $(210 + 0.15\, x) \; \rm lb$ of copper.

The mass of that mixture would be $(700 + x)\; \rm lb$ . The mass fraction of copper in that mixture would be:

$\displaystyle \frac{(210 + 0.15\, x)\; \rm lb}{(700 + x)\; \rm lb} \times 100\%$ .

This ratio is supposed to be equal to $25.5\%$ . These two pieces of equations combine to give an equation about $x$ :

$\displaystyle \frac{(210 + 0.15\, x)\; \rm lb}{(700 + x)\; \rm lb} \times 100\% = 25.5\%$ .

$\displaystyle \frac{210 + 0.15\, x}{700 + x} = 0.255$ .

Simplify and solve for $x$ :

$210 + 0.15\, x= 0.255\, (700 + x)$ .

$(0.255 - 0.15)\, x= 210 - 0.255 \times 700$ .

$\displaystyle x = \frac{210 - 0.255 \times 700}{0.255 - 0.15} = 300$ .

Therefore, $300\; \rm lb$ of that $15\%$ alloy would be required.

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2 years ago

Three friends share the cost of renting a game system. Each person rents one game for 8.50. If each person pays 13.25, what is t

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13.25x3-(8.50x3)=x x is the cost of the system

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3 years ago

What is it called when you have two burgers but one of them is half?

antiseptic1488 [7]

1 1/2? I pretty sure this is the answer.

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2 years ago

Read 2 more answers

How to you solve x2 -20x -17 = -53

Gennadij [26K]

Answer:

solve for x

x=2

Step-by-step explanation:

x2-20x-17=-53

reorder like terms x2= 2x 2x=20x-17=-53

collect like terms 2x-20x=-18x -18x-17=-53

move constant to the right hand side and change its sign -18x=-53+17

calculate the sum -53+17= -36 -18x=-36

divide both sides by -18 -18x÷-18= x -36÷-18=2

x=2

7 0

3 years ago