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TEA [102]
3 years ago
9

Read the following conjecture. Any number that is divisible by 4 is also divisible by 8. Find a counterexample to show that the

conjecture is false.
Mathematics
2 answers:
Leokris [45]3 years ago
7 0
A counterexample would be 4.
4 is divisible by 4 but 4 is not divisible by 8.
12 is divisible by 4 but 12 is not divisible by 8.
20 is divisible by 4 but 20 is not divisible by 8.
zepelin [54]3 years ago
4 0

Answer:

28 is divisible by 2 but not by 8. (Gradpoint)

Step-by-step explanation:

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A triathlon requires participant to complete the following tasks:
Lesechka [4]

Answer:

Step-by-step explanation:

Time taken for task 1:

Distance= 750m= 0.75 km

Speed= 10 km/hr

Time taken1= S (distance)/ V (speed)= 0.75/10= 0.075 hr= 4 mins and 30 sec

Time taken for task 2:

t2=S/V= 20/85= 0.24 hr= 14 mins and 24 sec

Time taken for task 3:

t3= S/V = 5/14= 0.36 hr= 21 mins and 36 sec

Total time took:

T1 +T2+T3= 40 mins and 30 second (approximately)

7 0
3 years ago
The diagram shows a 7cm x 6cm rectangle-based pyramid all the diagonal sides - TA TB TC and TD are length 10cm M is the midpoint
dedylja [7]

Given:

The base is a rectangle of dimension 7 cm×6 cm.

The length of each diagonal side = 10 cm

To find the height of MT.

Formula

By Pythagoras theorem we get,

h^{2} = l^{2}  + b^{2}

where, h be the hypotenuse

b be the base and

l be the height.

Now, in this diagram,

The perpendicular distance of M from BC = 3 cm

Slant height = 10 cm

Taking, b = 3 and h = 10 we get,

10^{2}  = l^{2} + 3^{2}

or, l^{2} = 10^2-3^2

or, l = \sqrt{100-9}

or, l = 9.5

Hence,

The height of MT is 9.5 cm.

4 0
3 years ago
Alana has 2 1/4 bags of chocolate chips that she wants to use in 3 batches of chocolate chip cookies. How much of the chocolate
drek231 [11]

Answer:

1 1/3 bags of chocolate chips

Step-by-step explanation:

If Alana has 2 1/4 bags of chocolate chips that she wants to use in 3 batches of chocolate chip cookies, then we can say;

2 1/4 bags of cookies = 3 batches of chips

To determine how much of the chocolate chips will she use in each batch of cookies, we can say;

1 bag of cookies = x batches of chips

Equating both expressions

2 1/4 bags of cookies = 3 batches of chips

1 bag of cookies = x batches of chips

Cross multiply

2 1/4 x = 3

9/4 x = 3

9x/4 = 3

9x = 12

x = 12/9

x = 4/3

x = 1 1/3

Hence Alana will need 1 1/3 bags of chocolate chips

8 0
3 years ago
PLEASE ANSWER IN LESS THAN 10 MINUTES!!!!!!!!!!!<br> Multiply.<br><br> 3.56 • –14
Inga [223]
If do the math as is shown to you will get -49.84 that I will show you its right @TTSSPony2002 so you do the math like this 3.56*-14= -49.84

5 0
3 years ago
Find the measure of an<br> exterior angle of a regular<br> polygon with 18 sides.
Elenna [48]

Answer:

compute its exterior angle as 360/18, which is 20 degrees

Step-by-step explanation:

8 0
3 years ago
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