4 years ago

Sean answers 4/5 of the questions on a test correctly. If there are 100 questions, how many did he not answer correctly?

Mathematics

2 answers:

Serhud [2]4 years ago

8 0

Convert 4/5 to 80 /100. And you get 20 for the final answer.

DanielleElmas [232]4 years ago

3 0

He would have answered 20 incorrectly.

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Solve for x 7 x − 4 = 6 Give your answer as an improper fraction in its simplest form.

ArbitrLikvidat [17]

Answer:

10\7

Step-by-step explanation:

7x-4=6

7x=6+4

7x=10

7x\7=10\7

x=10\7

4 0

3 years ago

2. - 2/5 (5x - 15) = 10

Serggg [28]

Answer:

x=-2

Step-by-step explanation:

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3 years ago

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Determine the value of the expression 4^3 × 4^-6 .<br> A) -12 <br> B)-1/12<br> C)64 <br> D)1/64

omeli [17]

$\bf 4^3-4^{-6}\implies 4^{3-6}\implies 4^{-3}\\\\
-----------------------------\\\\
now\quad recall\implies a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}\\\\
-----------------------------\\\\
4^{-3}\implies \cfrac{1}{4^3}\implies \cfrac{1}{64}$

7 0

3 years ago

Ziv's taxicab ride cost $33. He left a 15% tip.

sergiy2304 [10]

Answer:

Step-by-step explanation:

1. Find 15% of $33 to find the tip.

Find 1% of $33 (move the decimal over 2 places to the left. $0.33

2. Multiply the 1% tip by 15%

33 * 15 = $4.95

3. Add $33 and $4.95

4.95 + 33.00 = $37.95 total

4 0

3 years ago

The princess traces one plant’s roots to discover that it has exactly 5 roots. One of the roots she can trace to 2−3√5. At least

Y_Kistochka [10]

complex roots occur in conjugate pairs

given 2 - 3√5 is a root then 2 + 3√5 is also a root

one of the other roots is 2 + 3√5

there are 2 roots of - 4

one of the other roots could be another - 4

3 0

4 years ago