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ozzi
3 years ago
14

A recipe for apple cake needs 10 mL of baking powder, 70 mL of butter, 190 mL of sugar and 420 mL of flour. This is enough to ma

ke a cake for 8 people. How much of each ingredient would be needed to make a cake for 20 people?
Mathematics
1 answer:
Pepsi [2]3 years ago
8 0

20/8 = 2.5

multiply all the ingredients by 2.5

10 ml  * 2.5 = 25 ml of baking powder

70 *2.5 = 175 ml of butter

190 * 2.5 = 475 ml of sugar

420 * 2.5 = 1050 ml of flour

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Madison works part time at a local farm. She makes $10.00 an hour for cleaning the animals
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2 years ago
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PLEASE HELP ASAP
ladessa [460]
1)An equation in the slope-intercept form is written as

y=mx+by=mx+b

Where m is the slope of the line and b is the y-intercept. You can use this equation to write an equation if you know the slope and the y-intercept.

Example

Find the equation of the line

Choose two points that are on the line

Calculate the slope between the two points

<span><span>m=<span>y2−y1x2−x1</span>=<span><span>(−1)−3</span><span>3−(−3)</span></span>=−46=−23</span><span>m=<span>y2−y1x2−x1</span>=<span><span>(−1)−3</span><span>3−(−3)</span></span>=−46=−23</span></span>

We can find the b-value, the y-intercept, by looking at the graph

b = 1

We've got a value for m and a value for b. This gives us the linear function

<span>y=−23x+1y=−23x+1</span>

In many cases the value of b is not as easily read. In those cases, or if you're uncertain whether the line actually crosses the y-axis in this particular point you can calculate b by solving the equation for b and then substituting x and y with one of your two points.

We can use the example above to illustrate this. We've got the two points (-3, 3) and (3, -1). From these two points we calculated the slope

<span>m=−23m=−23</span>

This gives us the equation

<span>y=−23x+by=−23x+b</span>

From this we can solve the equation for b

<span>b=y+23xb=y+23x</span>

And if we put in the values from our first point (-3, 3) we get

<span><span>b=3+23⋅(−3)=3+(−2)=1</span><span>b=3+23⋅(−3)=3+(−2)=1</span></span>

If we put in this value for b in the equation we get

<span>y=−23x+1y=−23x+1</span>

which is the same equation as we got when we read the y-intercept from the graph.

To summarize how to write a linear equation using the slope-interception form you

Identify the slope, m. This can be done by calculating the slope between two known points of the line using the slope formula.Find the y-intercept. This can be done by substituting the slope and the coordinates of a point (x, y) on the line in the slope-intercept formula and then solve for b.

Once you've got both m and b you can just put them in the equation at their respective position.

https://www.mathplanet.com/education/algebra-1/formulating-linear-equations/writing-linear-equations.....


2)https://www.cymath.com/answer?q=6x%20%2B%202y%20%3E%204


3)https://www.cymath.com/answer?q=9x%20%E2%80%93%203y%20%3D%2012

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