y = -1/2x + 5 should be your equation because it is 5 ft above sea level and its eroding, or going down, 1 ft per 20 years. So every year, the sand dune erodes 1/20 ft more.
Hope this helps!
17 is the answer
3y-2=y+4
2y-2=4
2y=6
2y/2=6/2
y=3
STEP 1:
determine equations needed
x= # of $10 tickets
y= # of $14 tickets
QUANTITY EQUATION
x + y= 800
COST EQUATION
$10x + $14y= $9,040
STEP 2:
multiply quantity equation by -14
-14(x + y)= -14(800)
-14x - 14y= -11,200
STEP 3:
add new quantity equation in step 2 to cost equation of step 1 to solve for x using elimination
-14x - 14y= -11,200
10x + 14y= 9040
y term cancels out
-4x= -2160
divide both sides by -4
x= 540 ten dollar tickets
STEP 4:
substitute x value in step 3 into either original equation
x + y= 800
540 + y= 800
subtract 540 from both sides
y= 260 fourteen dollar tickets
ANSWER: There were 540 $10 tickets and 260 $14 tickets sold.
Hope this helps! :)
5/8 would be the answer..
<span><span>7/8</span>-<span>1/4</span></span><span>=<span>(7 × 4) - (1 × 8)8 × 4</span></span><span>=<span>20/ 32</span></span><span>=<span>20 ÷ 432 ÷ 4</span></span><span>=<span>5/8<span>
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Answer:
a, b
Step-by-step explanation:
a and b cause all the data are not in a form of a line
