3 years ago

870 mg sodium is 30% of recommended daily allowance. What is the recommended daily allowance

Mathematics

2 answers:

lidiya [134]3 years ago

7 0

30% = 0.30
870 mg * 0.30 = 261 mg
Daily allowance = 261 mg

Sedbober [7]3 years ago

5 0

The recommended daily allowance is 2,900 Mg. 2,900 times .3 (decimal form of 30%) will give you 870 Mg

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Can someone show me how to write the standard form of the line that contains a slope of 2/3 and passes through the point (1, 1)?

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Answer:

$\large\boxed{y=\dfrac{2}{3}x+\dfrac{1}{3}\qquad\text{slope-intercept form}}\\\\\boxed{y-1=\dfrac{2}{3}x-\dfrac{2}{3}\qquad\text{point-slope form}}\\\\\boxed{2x-3y=-1\qquad\text{standard form}}$

Step-by-step explanation:

$\text{The standard form:}\ Ax+By=C$

$\text{The point-slope form:}\\\\y-y_1=m(x-x_1)\\\\m-slope\\\\\text{We have the slope}\ m=\dfrac{2}{3}\ \text{and the point}\ (1,\ 1).\ \text{Substitute:}\\\\\underline{y-1=\dfrac{2}{3}(x-1)}\qquad\text{use the distributive property}\\\\y-1=\dfrac{2}{3}x-\dfrac{2}{3}\qquad\text{add 1 to both sides}\\\\\underline{y=\dfrac{2}{3}x+\dfrac{1}{3}}$

$y=\dfrac{2}{3}x+\dfrac{1}{3}\qquad\text{multiply both sides by 3}\\\\3y=2x+1\qquad\text{subtract 2x from both sides}\\\\-2x+3y=1\qquad\text{change the signs}\\\\\underline{2x-3y=-1}$