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kow [346]
3 years ago
12

I need help plz my mom is making me do more questions and I need to check them.

Mathematics
2 answers:
Nesterboy [21]3 years ago
7 0
The second one would be 80 square feet. It would be that because square feet is used in area, meaning twice. Multiply 24x2 and 16x2. It would be 48 and 32. When adding them you will get 80.
yuradex [85]3 years ago
4 0
Perimeter of square = 4s perimiter of pentagon= 5s, i guess? its a regular one afterall 4s = P 4 (10) = p 40 = P (40 = 5s)/ 5 8 = s


Sorry I dont know how to answer the second one...

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Select the statements that are true based on the following given information. D = {x | x is a whole number} E = {x | x is a perf
likoan [24]
<h3>2 Answers: Choice C and Choice D</h3>

==========================================================

Explanation:

Let's write the roster notation of each set

D = {0, 1, 2, 3, ...} the dots indicate the pattern goes on forever

E = {0, 1, 4, 9, 16, 25} = list of perfect squares smaller than 36

F = {20, 22, 24, 26, 28, 30} = even numbers between 20 and 30

----------------

If we intersect sets D and E, we're looking for what numbers are in both sets at the same time. Therefore, D ∩ E = {0, 1, 4, 9, 16, 25} which is the exact same as set E. This is because all of set E is inside of set D. We say that set E is a subset of set D. So, D ∩ E = E.

Choice A is very close to being true. The problem is that 25 is missing from the set {1,4,9,16}. So this is why choice A is false.

----------------

Now let's intersect sets D and F. The numbers they have in common are {20, 22, 24, 26, 28, 30} which is exactly what set F is. So set F is a subset of set D. We can write D ∩ F = F in much the same way we can say D ∩ E = E.

D ∩ F = {12,14,16,18} is not true. A number like 12 is not between 20 and 30, so it cannot be in set F.

Choice B is false so we cross it off the list.

----------------

Choice C is true and here's why

D ∪ (E ∩ F) is the same as saying D ∪ G where G is the set of intersecting E and F together. In other words, G = E ∩ F

We don't really need to even worry about sets E, F or G. All that matters here is set D.

When we write D ∪ (E ∩ F) or D ∪ G, we're saying "a number is in set D, or it is in set G". If it is in D, then it's a whole number. Otherwise, it's in a subset of whole numbers.

Overall, D ∪ G and D ∪ (E ∩ F) form the entire set of whole numbers.

------------------

Choice D is true.

E and F have nothing in common

E = {0, 1, 4, 9, 16, 25}

F = {20, 22, 24, 26, 28, 30}

So intersecting them leads to the empty set. This is the set with nothing inside it, not even 0.

------------------

Choice F is false

These two sets below

E = {0, 1, 4, 9, 16, 25}

F = {20, 22, 24, 26, 28, 30}

union together to get

H = {0,1,4,9,16,20,22,24,25,26,28,30}

just toss all of the numbers together into one big set

Notice how each of these numbers are whole numbers, so they are part of set D. This means set H is also a subset of set D.

When we intersect sets D and H, we end up with set H. We do not simply end up with the set with 25 only inside it.

6 0
3 years ago
IF A:B =2:3 AND B:C=6:7 THEN WHAT'S A:B:C?
saw5 [17]

Step-by-step explanation:

A:B:C

2:3

6:7

12:18:42

I think...

8 0
3 years ago
Read 2 more answers
Holly wants to make a frame for a painting. The painting is square and has an area of 225 square inches. a. Write an equation to
nalin [4]

Answer:

a) area = side²

225 in² = side²

side = √225 = 15 inches

b) 15 inches per side x 4 sides x $1.35 per inch = $81.00

Step-by-step explanation:

4 0
2 years ago
Need help plzzzz!!!!
uysha [10]

Answer:

11a. 15x + 6

11b. x + 8 < 16 or x + 8 - 16

12. 3x + 15 + 5x = 8x + 15

13. 7x + 31

Step-by-step explanation:

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=4%20%5Cdiv%20%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1" title="4 \div \frac{1}{2} " alt="4
IRINA_888 [86]

Answer:

8

Step-by-step explanation:

4 ÷ 1/2

~Turn the 4 into a fraction

4/1 ÷ 1/2

~Copy Dopt Flip

4/1 * 2/1

~Multiply

8/1

~Simplify

8

Best of Luck!

8 0
3 years ago
Read 2 more answers
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