Using the formula <span>Z = (X - μ) / σ, X being 900, </span>μ being 1100, and <span> σ being 100, we can get the Z-score of -2.</span>
Answer:
Let x represent the smaller number and y represent the larger number
<u>For the first equation </u>
Four times a number added to 3 times a larger number is 31 is written as
4x + 3y = 31
Making y the subject we have
3y = - 4x + 31
Divide both sides by 3
That's

<u>For the second equation</u>
Seven subtracted from the larger number is equal to twice the smaller number is written as
y - 7 = 2x
Making y the subject
We have
<h3>y = 2x + 7</h3>
Hope this helps you
Answer:?
Step-by-step explanation:
Answer:
The orginal price was $33.09.
Step-by-step explanation:
You take 30% and move the decimal two places to the left, which gives you .3
Then mutiply .3 to $25.45. This gives you $7.64.
Add $7.64 to discounted price ($25.45) and you get $33.09.