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Vlad1618 [11]
2 years ago
9

Janelle has taken an online defensive safety driving course and is now completing the course exam. While taking the exam on the

computer the screen tells her the portion of the test she has finished m.she has just completed question 21, which is 30% of the exam.how many total questions are on the test
Mathematics
1 answer:
LenKa [72]2 years ago
5 0
There are 70 questions on the test
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Sara completes 2/5 of her math homewIrk in class. What percentage is left for Sara to finish
Bad White [126]

Step-by-step explanation:

Well 3/5 is left.

20 × 5 = 100

She did 40% because 2/5 = 4/10

So if 20 × 3 = 60 the there is 60% left

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3 years ago
How to solve 4x+7=15
Over [174]
<span>4x+7=15

First step is to subtract 7 from both sides to get rid of it.
4x + 7 - 7 = 15 - 7
4x = 8

Now all you have to do is divide both sides by 4.
4x/4 = 8/4
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The answer is x = 2.</span>
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91/2 gallons =? quarts
jenyasd209 [6]
 the answer is 3648 quarts
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3 years ago
Module 3 DBA: What key features can be identified from graphs of polynomials of higher-
Ksju [112]

Answer:

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Step-by-step explanation:

4 0
2 years ago
Solve log base 6 (x-6) - log base 6 (x + 4) = 2
Ray Of Light [21]

Answer:

no solutions

Step-by-step explanation:

Since the two terms have the same base, we are able to use the rule for subtracting logarithms:

log_{b}(x) - log_{b}(y) = log_{b}(\frac{x}{y} )

Therefore, the equation can be written as:

log_{6}(\frac{x-6}{x+4} )=2

By using the definition of a logarithm we can say that:

\frac{x-6}{x+4} = 6^{2}\\\frac{x-6}{x+4} = 36\\x -6 = 36x+144\\35x = -150\\x =-\frac{30}{7}

When plugging this solution in, you find that the term log_{6}(x-6) has x-6 evaluate to a number less than 0. This is not included in the domain of log functions, so -\frac{30}{7} is not a valid solution. This means that there are no solutions.

4 0
2 years ago
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