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3 years ago

Sarah was thinking of a number. Sarah doubles it and gets an answer of 4.5. What was the original number?

Mathematics

2 answers:

Nutka1998 [239]3 years ago

7 0

Answer:

2.25

Step-by-step explanation:

Just half 4.5 and you should get 2.25 which is quite easy to be honest

vodka [1.7K]3 years ago

6 0

Answer:

2.25

Step-by-step explanation:

4/5/2=2/25

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45/200 x + x = 3920<br> what does x equal?

blagie [28]

Answer:

3/52528

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers

3 and 5 over 12 divided by 2 and 1 over 6

LiRa [457]

3 \frac{5}{12} / 2 \frac{1}{6}

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3 years ago

Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was

Marizza181 [45]

Answer:

The raw score for his exam grade is 99.69.

Step-by-step explanation:

Given : The professor announced that the mean for the class final exam was 88 with a standard deviation of 7. Given Daniel's z score of 1.67.

To find : What is the raw score for his exam grade?

Solution :

The formula use to find the z-score is

$z=\dfrac{x-\mu}{\sigma}$

Where, z=1.67 is the z-score

$\mu=88$ is the means

$\sigma=7$ is the standard deviation

x is the raw score for his exam grade

Substitute the values,

$1.67=\dfrac{x-88}{7}$

$1.67\times 7=x-88$

$11.69=x-88$

$x=88+11.69$

$x=99.69$

Therefore, the raw score for his exam grade is 99.69.

7 0

3 years ago

Someone please help me this is the only thing i need for this page .

Aneli [31]

Answer:

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6 0

3 years ago

Corey and Devante both leave the park at the same time but in opposite directions if Corry travels 30 mph and Devonta travels 22

telo118 [61]

Answer:

2 hours 1 minute 9.23 seconds

Step-by-step explanation:

Since they are traveling in opposite directions, their separation speed is the sum of the magnitudes of their speeds: 30 +22 = 52 mph.

The time is related to speed and distance by ...

time = distance / speed

= (105 mi)/(52 mi/h = 2 1/52 h ≈ 2 h 1 min 9.23 sec

It will take a little over 2 hours before they are 105 miles apart.

4 0

3 years ago