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3 years ago

Do anyone know this answer?

Mathematics

1 answer:

Irina-Kira [14]3 years ago

3 0

Answer:

the last one, 2/2 is your answer

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In the morning, the temperature was -8°F. By noon, the temperature had risen 15°F. What was the temperature at noon?

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2 years ago

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A recipe calls for 4 cups of sugar and 16 cups of water. If the recipe is reduced, how many cups of water should be used with 1

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Divide the recipe by 4. You need 4 cups of water.

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2 years ago

Look at Diagram.<br> It says,"<br> ST and TU are tangent to Q. What is the value of x?"

shutvik [7]

Answer:x=18

Step-by-step explanation:2x-9=x+9

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3 years ago

Evaluate

Montano1993 [528]

Step-by-step explanation:

Multiplication of fractions is easiest operation. Simply multiple numerator to numerator and denominator to denominator. For example,

$\frac{x}{y} * \frac{a}{b }= \frac{x*a}{y*b}$

Addition and subtraction requires that we find a common demoninator.

For example,

$\frac{6}{4} + \frac{4}{3}$

The common denominator is 12. So I need to muliply each fraction to get the right denominator. 4*3 = 12.

$\frac{6}{4}*\frac{3}{3} + \frac{4}{3} \frac{4}{4} = \frac{18}{12}+\frac{16}{12}$

Then we add the numerators

$\frac{18+16}{12} = \frac{32}{12}$

Then we should reduce.

$\frac{16}{6} = \frac{8}{3}$

Division is a little trickier because we have to flip-flop the second term and then multiply. For example: $\frac{1}{10} \div \frac{5}{6} \rightarrow \frac{1}{10} * \frac{6}{5} = \frac{6}{50}$

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3 years ago

The advertising department of a nationally circulated magazine wishes to estimate the mean age of its subscribers within 0.5 yea

zhenek [66]

Answer: Option 'd' is correct.

Step-by-step explanation:

Since we have given that

Margin of error = 0.5 years

Standard deviation = 5

At 90% confidence, z = 1.645

We need to find the minimum size of the sample they must take.

So,

$n=(\dfrac{z\sigma}{E})^2\\\\n=(\dfrac{1.645\times 5}{0.5})^2\\\\n=270.6\\\\n\approx 271$

Hence, Option 'd' is correct.

5 0

2 years ago