First, plot 2x + 3y = 15 on a graph. Then plot (1,3) on a graph. After that, draw a line that passes through (1,3) and forms 90 degrees angles with 2x + 3y = 15. Then find the equation of that line by finding the y-intercept (0, 1.5). Then head up to the intersection point (1.6153846153846, 3.9230769230769). Subtract 1.5 from y. (2.4230769230769) Then divide by 1.5 (1.6153846153846). Reverse the operations you just did (in reverse order) to get the equation y = 1.5x + 1.5.

(I don't know how to explain this too well. Here's a graph to make more sense of it.)

5 0

3 years ago

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What is 1 and 2 10ths written as a decimal?

kvv77 [185]

1 is the whole number which means it goes before the decimal point. 2/10 is the fractional piece making it go after the decimal point in the tenths place.

1 2/10 = 1.2

8 0

3 years ago

To clean a tank, 3/4 cup of disinfectant is needed for every 2 gallons of water. How many cups of disinfectant are needed for 20

eduard

Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of gallons of water.”How many cups of disinfectant are needed for 20 gallons of water so c is

5 0

3 years ago

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Consider the following equation, bh + hr = 25 when solving for h

Eva8 [605]

Answer:

h = $\frac{25}{b+r}$