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3 years ago

How much of an alloy that is 10 percent copper should be mixed with 500 ounces of an alloy that is 90?

1 answer:

6 0

So 500ounces is 90% of the alloy.
So 500:90
Now divide both sides by 9.
500/9:10
So thats
55.56:10 or
55 5/9:10
Or keep it as
500/9:10

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(x^2-4x)^2+7x^2-28x+12=0

Valentin [98]

Answer:

$x^4-9x^2-28x=-12$

Step-by-step explanation:

$(x^2-4x)^2+7x^2-28x+12=0$

$(x^4-16x^2)+7x^2-28x=-12$

$x^4-9x^2-28x=-12$

7 0

3 years ago

Find the slope of the line that passes through (3, 7) and (6, 8).

OLEGan [10]

Answer:

Slope = 1/3

Step-by-step explanation:

Step 1: Define general form of equation of line

An equation of a straight line on two-dimensional plane could be represented in form of: y = Mx + b, with M is slope and b is y-intercept

Step 2: Set up the system to solve for slope M of equation of line

That equation passes 2 points, which are represented in form of (x, y), (3, 7) and (6, 8).

Substitute these values of x and y into the original equation in step 1:

7 = 3M + b

8 = 6M + b

Step 3: Solve the system of equations in step 2 for M

Subtract 1st equation from 2nd equation:

8 - 7 = 6M - 3M + b - b

Simplify both sides:

1 = 3M

Divide both sides by 3:

=> M = 1/3

Hope this helps!

8 0

4 years ago

Read 2 more answers

This is K12 in sixth grade

zmey [24]

Answer:

Step-by-step explanation:

divide 150 by 12

the answer is 12.5

round 12.5

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8 0

3 years ago

Read 2 more answers

What is the answer to 23,450 to the nearest thousands

miss Akunina [59]

Answer:

23,000

Step-by-step explanation:

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4 0

3 years ago

Determine the intercepts of the line. y-intercept (____,____) x-intercept (____,____)

bija089 [108]

Answer:

y intercept is (0 , 2.5)

x intercept is (3.5 , 0)

Step-by-step explanation:

Khan Academy is fun !!!!!!!!!!

y- intercept is where the line meets the y line l

x- intercept is where the line meets the x line ____

The y-intercept is 2.5

The x-intercept is 3.5

3 0

3 years ago