Cross multiply to solve
(-3r)(4)=(-27)(2)
Multiply on both sides
-12r=-54
Divide both sides by -12
r=4.5
Final answer: r=4.5
Check:
-3(4.5)= -13.5
-13.5/2= -6.75
-27/4=-6.75
BEAUTIFUL !
Nothing shown below and no choices.
A perfect twofer !
Answer:
Step-by-step explanation:
1) Split the second term in into two terms.
1 - Multiply the coefficient of the first term by the constant term.
2 - Ask: Which two numbers add up to 2 and multiply to -35?
7 and -5.
3 - Split 2x as the sum of 7x and -5x.
2) Factor out common terms in the first two terms, then in the last two terms.
3) Factor out the common term x+1.
4) Solve for x.
1 - Ask: When will (x+1)(7x-5) equal zero?
When x + 1 0 or 7x-5=0
2 - Solve each of the 2 equations above.
So,
All we have to do is multiply the amount of water Andy carried by the fractional amount he drank.
1/2 * 2/3
This is pretty simple. To halve TWO-thirds, just halve the numerator, since it's such a nice number.
Presto. Half of two is one.
Therefore,
1/2 * 2/3 = 1/3
Andy drank 1/3 gallons of water on his hike. That's 5 1/3 cups of water. I would estimate his hike to be about 3 miles. Easy peasy.
the following are my reminders in using this module