#4
a) 5:1/3 and 1:x
5/ 1/3= 1/x
5x = 1/3
x = 1/3 /5 =1/3 x 1/5 =1/15
x = 1/15 cup of flour to make one roll
b) 3 dozen = 36 1:1/15 and 36:x
1/ 1/15 = 36/x
x =36 x 1/15 = 12/5 = 2 2/5
x = 2 2/5 cups of flour
c) 1:1/15 and x:5 2/3 5 2/3= 17/3
1/ 1/15 = x/ 17/3
1/15x = 17/3
x =17/3 / 1/15
x =17/3 x 15
x =17 x 5
x = 85 rolls
Answer:
$7.20
Step-by-step explanation:
8% as a decimal would be 0.08.
To find the sales tax, you would multiply 0.08(90)
0.08(90)=7.2
In dollars, that would be $7.20
Step-by-step explanation:
2x + 10y = 50 ... 1
1.5x + 25y = 90 ...2
...1 × 2.5
5x + 25y = 125 ...3
...3 - ...2
3.5x = 35
x = 10
replaced x = 10 in ...1
2(10) + 10y = 50
20 + 10y = 50
10y = 50 - 20
10y = 30
y = 3
For the first quarter you would use the equation of $2000+(2000 times 0.08)=the money for the first quarter or $2160. the second quarters equation is $2000+(2000 times 0.08)2= the money for the second quarter or $2320. the thirds quarters equation is $2000+(2000 times 0.08)3= the money for the third quarter or $2480. The fourth quarters equation is $2000+(2000 times 0.08)4=the money for the fourth quarter or $2640.
