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VLD [36.1K]
3 years ago
7

Please help I need this done by tomorrow Thank you

Mathematics
2 answers:
PtichkaEL [24]3 years ago
5 0

19. C

20. B

21. 200

22. im not sure if im right but i think p+6

23. C

24. Can't see

Pavlova-9 [17]3 years ago
3 0

Question 1:

For this case we must find the value of the following expression:

4 ^ 3-3 ^ 3

So we have to:

4 ^ 3 = 4 * 4 * 4 = 4 ^ 2 * 4 = 16 * 4 = 64\\3 ^ 3 = 3 * 3 * 3 = 3 ^ 2 * 3 = 9 * 3 = 27

Substituting we have:

64-27 =\\37

Thus, the value of the expression is 37.

Answer:

4 ^ 3-3 ^ 3 = 37

Option C

Question 2:

For this case we have the following expression:

2 * 3 ^ 2

We must simplify it!

We have to:

3 ^ 2 = 3 * 3 = 9

Rewriting the expression we have

2 * 9 =

2 times 9 is 18.

Finally we have to:

2 * 3 ^ 2 = 18

Answer:

2 * 3 ^ 2 = 18

Option B

Question 3:

For this case we have that by definition, the perimeter of a square is given by:

P = 4l

Where:

l: It's the side of the square

In this case they tell us that:

l = 50 \ in

Thus:

P = 4 * 50\\P = 200 \ in

Now we must do a conversion. By definition we have to:

1 foot equals 12 inches. So:

200 \ in * \frac {1} {12} * \frac {ft} {in} = \frac {50} {3} ft = 16.67ft\\

Answer:

The perimeter of the garden is 16.67 \ ft

Question 4:

For this case we have to:

Let "p" be the variable that represents the number of pages Nora read yesterday.

If today I read 6 more than yesterday, then we can write the following expression:

p + 6

So, the number of pages that Nora read today is p + 6

ANswer:

The number of pages that Nora read today isp + 6

Question 5:

For this case we have that by definition, the area of ​​a triangle is given by:

A = \frac {b * h} {2}

Where:

b: It is the base of the triangle

h: It is the height

We have as data that:

b = 5 \ cm\\h = 8 \ cm

Substituting we have:A = \frac {5 * 8} {2} = \frac {40} {2} = 20 \ cm ^ 2

The area of ​​the triangle is20 \ cm ^ 2

Answer:

Option B

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