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3 years ago

Math question down below

Mathematics

1 answer:

sergeinik [125]3 years ago

7 0

The absolute value symbol (that being when a number has the 2 lines on the outside |-x| simply makes whatever is inside of it positive after it has been solved. Therefore, the easiest way to think about it is without the absolute value signs at all and just assume every number is positive. When we do this, we can see that the correct answer is C. |-3.5|, |4.2|, |-9|.

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Write 4,706 × 10 11 in standard notation

aleksandrvk [35]

I am guessing that is 1011? Just to be safe, I will do 4706*10 and 4706*1011.

4706*10: So, 4,706 times 10 is 47060

4706*1011: 4,706 times 1011 is 4757766

Standard notation is the normal way of writing numbers. So the answers I wrote are all in Standard notation.

5 0

3 years ago

Charlie runs at a speed of 3 yards per second . About how many miles per hour does Charlie run?

MrMuchimi

Ok so this can get tricky, it is basically just asking for you to perform many unit conversions. I'll try to simplify it for you here while still maintaining the explanation. If you have any questions about this process feel free to message me.

3 yards = ____ miles (conversion factor is 1760 because there are 1760 yards in a mile)

3/1760 = 0.017 miles,

Now we just need to convert seconds to hours.

1 second is how many mins, then how many mins in an hour?

360 seconds in an hour.

Ok now we just need to combine these two pieces of info,
0.017/360 = 4.72222 miles per hour. Thus 4.72 is the answer.

6 0

3 years ago

Read 2 more answers

Can some help me pls And fact

Anon25 [30]

Answer:

Step-by-step explanation:

The three angles of a triangle add to 180 degrees. One angle is 10, the second is a right angle( which is 90 degrees). Let the third angle be x

10 +90 +x = 180

Combine like terms

100 +x =180

Subtract 100 from each side

100-100 +x= 180-100

x = 80

6 0

3 years ago

Read 2 more answers

Find the perimeter of a rectangle whose length is 3 cm greater than its height, and whose area is 40 cm².

jonny [76]

Answer: $26\ cm$

Step-by-step explanation:

The perimeter of a rectangle can be calcualated with this formula:

$P=2l+2h$

Where "l" is the lenght and "h" is the height.

The area of a rectangle can be found with this formula:

$A=lh$

Where "l" is the lenght and "h" is the height.

In this case we know that:

$A=40\ cm^2$

Therfore, we can susbsitute them into $A=lh$ and solve for "h" in order to find its value:

$40=(h+3)h\\\\40=h^2+3h\\\\h^2+3h-40=0$

Find two number whose sum is 3 and whose product is -40. These are -5 and 8. Then, factorizing, we get:

$(h-5)(h+8)=0\\\\h_1=5\\\\h_2=-8$

The positive value is the height. Then:

$h=5\ cm$

Since the length is 3 centimeters greater than its height, we get that this is: Then:

$l=5\ cm+3\ cm\\\\l=8\ cm$

Substituting values into $P=2l+2h$ , we get that the perimeter is:

$P=2(8\ cm)+2(5\ cm)\\\\P=26\ cm$

8 0

3 years ago

Read 2 more answers

A card is drawn from a standard deck of 52 playing cards. If the card is a club, a fair coin is flipped 9 times and the number o

olasank [31]

Answer: There are 18 elements in the sample space for this experiment

Step-by-step explanation:

Total cards = 52

Total outcomes on tossing a coin = 2 [1 head , 1 tail]

If the card is a club, a fair coin is flipped 9 times and the number of heads flipped is noted (but card drawn is not noted)).

Possible outcomes for heads = 0,1,2,...,9

So sample space for this event = {0,1,2,3,4,5,6,7,8,9}   (Total 10 elements )  (i)

If it is not a club, the coin is only flipped 3 times, but this time the result of each flip is noted(but card drawn is not noted).

Sample space with all possible outcomes ={TTT,TTH, THT, HTT, HTH,HHT,THH,HHH} (Total 18 elements ) (ii)

From (i) and (ii), Total elements in the sample space for this experiment = 10+8 = 18

Hence, there are 18 elements in the sample space for this experiment

4 0

3 years ago