All categories

4 years ago

I need help on this thank you

Mathematics

1 answer:

Rasek [7]4 years ago

5 0

I think it B or D I hope i don’t get it wrong

You might be interested in

There are eight performers who will present their comedy acts this weekend at a comedy club. How many different ways are there t

pshichka [43]

The answer would be 64

6 0

3 years ago

Read 2 more answers

Which is f(5) for the function -2x^2+2x-3?

zepelin [54]

-2(5)^2+2(5)-3
-2(25)+10-3
-50+10-3
-40-3
=-43

6 0

4 years ago

going down the river a boat went 13 km/h. going up the river it only 1 km/h. Find the speed of the boat in still water and the s

iris [78.8K]

This question looks really tricky, but it's actually just describing a system of equations. We have the equation for the speed of the boat with the current and the speed of the boat against the current. Call the boat speed b and the current speed c:
$b+c=13$
$b-c=1$

Then
$(b+c)+(b-c)=13+1$
$2b=14$
$b=7$

So the boat's speed is 7 km/h. Find the current's speed by plugging the boat speed back into one of the original equations:
$7+c=13$
$c=6$

The current's speed is 6 km/h.

4 0

3 years ago

If a polygon has 5 sides is it a regular pentagon

hjlf

No it is not anything can have 5 sides but not form a pentogon

7 0

3 years ago

Which of the following statements are always true for any two sets A and B?

Ivanshal [37]

Answer:

If A ⊆ B, then A ⊂ B.

If A = B, then A ⊆ B.

If A = B, then A ⊂ B.

Step-by-step explanation:

In set theory '⊂' is the symbol of proper subset and '⊆' is the symbol of subset of a set.

In option (a),

If A ⊆ B

⇒ A ⊂ B or A = B

Thus, If A ⊆ B, then A ⊂ B.

Option a is true.

(b) If A ⊂ B

⇒ A is the subset of B

That is, all elements of A are also the element of B,

But we can not say A = B

Thus, option b is not true.

(c) If A = B

⇒ A ⊂ B and A ⊃ B or A ⊆ B and B ⊆ A ( Because every set is the subset of itself )

⇒ A ⊆ B.

Option c is true.

(d) If A = B,

⇒ A ⊂ B

Option d is true.

(e) If A ⊂ B,

Then we can not say that,

A = B or A ≠ B

Thus, option e is not correct.

4 0

4 years ago

Read 2 more answers

I need help on this thank you ​

I need help on this thank you