MATH 0103: CH 2

-7a+15=4a-7

-7a+15=4a-7 -7a+22=4a 22=11a 2=a +7 +7 +7a +7a 11 11

Brad has $700 in ten-dollar bills and twenty-dollar bills. If he has two more twenties than tens, how many twenty-dollar bills does he have?

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solve for x .5(x-10)+.07(x+20)=57

.5x-5+.7x+14=57 .5x+.7x+19=57 .12x=38 x=38/.12 +5 +5 .12x+19=57 .12 .12

Solve for m E=mgh

E=mgh E/gh=m E/gh m/gh

Solve

(5+x)/3=(2-x)/6 30+6x=6-3x 24+6x=3x 24= -3x -6=x 6(5+x)=3(2-x) -6 -6 -6x -6x -3 -3

Abby's homework grade, rounded up, was 87%. If she earned points, how many points were possible?

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If 7 quarts of ice cream cost $19.53, find the cost of 12 quarts of ice cream.

7/19.53=12/x 234.36/7=x 234.36=7x 33.48=x

12oz. | $4.80 10oz. | $3.90 What is the better price?

12/4.80=.40 per oz 10/3.90=.39 per oz

solve for a 3(a+5)=-2a+5+2(a-10)

3(a+5)=-2a+5+2(a-10) 3a+15=25 3a=10 a=10/3 3a+15=-2a+5+2a-20 -15 -15 3 3

Solve for N

4/5N= -10 N= -40/5= -8 *4/5 *4/5

The golden gate bridge is 2604 ft longer than the brooklyn Bridge. Together their spans total 5796 ft How long is each bridge?

5796=2x+2604 3192=2x Golden = 4200 -2604 -2604 2 2 Brooklyn= 1596

5x-9=11

5x-9=11 5x=20 x=4 +9 +9 5 5

Clayton earned 48points on a 60 point geometry project. what percentage of the points did he earn?

60X=4800 X=80% 60 60

The perimeter of a certain square is 560 meters. what is the length of each side?

X=560/4 X=140

Find the area and perimeter of a triangle 5" high by 12" long and 13" hypotenuse.

p=5+12+13 A=(5*12)/2 A=30 p=5+26=31