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lisabon 2012 [21]
3 years ago
10

JUNIOR MATHEMATICAL CHALLENGE

Mathematics
1 answer:
quester [9]3 years ago
5 0

Answer:

all of these are prime numbers

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Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Minchanka [31]

Answer:

Step-by-step explanation:

2k+10   | Both terms share the common factor two, so you can take it out (divide both terms by 2)

2(k+5)  | Now if you use the Distributive Property to double check, you get 2k+ 10 again

4 0
3 years ago
If line n bisects CE, find CD. ​
Artist 52 [7]

If it bisect, then using the Line Bisector Theorem, it must be equal.

So x+6=4x-21

get like terms on 1 side

x+6=4x-21

-x. +21

27= 3x

x=9

plug the x in

CD= 9+6

CD=15

8 0
3 years ago
Read 2 more answers
While traveling to the office, dolly drives her car at a speed of 60 kmph and then suddenly the car stopped on half of her dista
lisabon 2012 [21]

The average speed of Dolly is 33.33kmph.

Average Speed:

The average speed is defined as the total distance travelled by the object in a particular interval of time. It can be calculated by dividing the total distance travelled by the total time taken.

So, Average Speed = total distance / total time

Here,

Let the total distance is 100 km.

Therefore, consider she will travel 60 km at speed of 60 kmph , 30 km at speed of 30 kmph and 10 km at speed of 10 kmph.

she will required times of 1 hour, 1hour and 1hour

So,

Average speed = 100 / (1 + 1 + 1)

=> 100 / 3 = 33.33

To know more about Average speed here

brainly.com/question/12322912

#SPJ4

6 0
1 year ago
Perform the operation 8-1/2+5-1/8
IrinaVladis [17]

Answer:

12.375 is believed to be the correct answer

7 0
3 years ago
Read 2 more answers
Help me please I really need it please help me
dalvyx [7]

The answer is in the image. If you convert them to improper fractions, the division is easier. Like 2/3 + 1 = 5/3

3 0
2 years ago
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