Alexandra correctly answered 90% of the questions on a math test. If she missed 4 questions, how many questions were on the test?
0.1x = 4
x = 4/0.1
x = ?
dont get it
This Warda's question, not alana's.
Alana-- if you want a further explanation, please post under your own name, using "Post a New Question."
To find out how many questions were on the test, we can use the information that Alexandra correctly answered 90% of the questions on the test.
Step 1: Convert the percentage to a decimal by dividing it by 100.
90% = 90/100 = 0.9
Step 2: Calculate the total number of questions she answered correctly by multiplying the decimal by the total number of questions.
Let x be the total number of questions on the test.
0.9x = number of questions answered correctly
Step 3: Set up an equation to solve for x.
0.9x = x - 4
0.9x - x = -4
-0.1x = -4
Step 4: Solve for x by dividing both sides of the equation by -0.1.
x = -4 / -0.1
x = 40
Therefore, there were 40 questions on the test.