Adel started her homework at 9:10 she finished at 9:45 how long did she spend in her homework

Mathematics

1 answer:

sukhopar [10]3 years ago

8 0

She spent 35 minutes doing her homework

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Please do 24 1/2 - 19 5/8

Luda [366]

In order to subtract mixed numbers, the easiest way to do it is to make them into improper fractions.

In order to do that, multiply the whole number by the denominator and add it to the numerator.

That would make 24 $\frac{1}{2}$ into $\frac{49}{2}$ .

Also, it'd make 19 $\frac{5}{8}$ into $\frac{157}{8}$ .

Now that they're both improper fractions, you need to make them have a common denominator in order to actually subtract them. You can do that by multiplying the numerator and denominator of $\frac{49}{2}$ by 4, to make it stay the same fraction, but have the same denominator as $\frac{157}{8}$ .

$\frac{49}{2} = \frac{196}{8}$

Now we can subtract them!

$\frac{196}{8} - \frac{157}{8} = \frac{39}{8}$
When subtracting fractions, only subtract the numerators. You don't subtract the denominators.

The final answer is $\frac{39}{8}$

7 0

4 years ago

Ten years ago, an organization reported that teenagers spent an average of 4.5 hours per week on the phone. The organization thi

lora16 [44]

Answer: Type I error would be a conclusion that average time spent on phone by teenager is higher than 4.5 hours per week which is actually the same.

Step-by-step explanation:

Type 1 error occurs when a null hypothesis is true but researcher rejects it.

Let $\mu$ be the average time spent on the phone by teenagers .