A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly? (Round to the nearest whole number)
16
Multiply the opposites: 80(20)=1600 then divide by the remaining number
200
What is 5x + 7x = 72
x=6
200
Solve for x and y
y=-2x+4
x=3y+7
x=77x+1
y=33y+0
200
What is the value of x 3^(x+2)-3^x=6^3(3^7)
10
200
What is 2(x-12)
2x-24
300
Jerry, an electrician, worked 7 months out of the year. What percent of the year did he work? (round to nearest hundredth) what percent of 12 is 7? 12 months=1 year
58.33%
300
What is 5 + 4x– 7 = 4x – 2 – x
x=0
300
Solve for y and x 5y + 8 = 2y – 3x + 5
y=-x
x=-1
300
What is (3/x)^-2
X^2/9
300
What is (4x + 3)(7x – 5)
28x^2+x-15
400
12 out of 60 books on a shelf are cookbooks. What percentage of the books are cookbooks? What % is 12 of 60?
20%
205(60)=(20/100)(60)=0.2(60)=12
400
What is -(-x-5)+5(x-9)=2(x+8)-(2x+5)
17/2
400
Solve for y and x
5y+8=2y-3x+5
y=-x
x=-1
400
What is (x^2y^-2/3)^-1/7
---------------------
x^-1/2y^-3
1/x^5/14y^1/3
400
What is (3x – 5)(2*2 – 4x + 7)
6x^3-22x^2+41x-35
500
If 75% of a class answered the 1st question on a certain test correctly, 55% answered the 2nd question on the test correctly and 20% answered neither of the questions correctly, what percent answer both correctly?