3 years ago

Hi!! I need some help with those exercises can anybody help me please !! Thanks you

Mathematics

1 answer:

elena55 [62]3 years ago

6 0

Answer:

Step-by-step explanation:

(a+b)^2=a^(2)+2ab+b^(2)

(a-b)^2=a^(2)-2ab+b^(2)

13)

(x+2)^(2)-(x-1)^2

x^(2)+4x+4-(x^(2)-2x+1)

x^(2)+4x+4-x^(2)+2x-1

6x+3

15)

(x+5)^(2)-(x+1)^2

x^(2)+10x+25-(x^(2)+2x+1)

x^(2)+10x+25-x^(2)-2x-1

8x+24

You might be interested in

PLEASE HELP ME WITH THIS QUESTION

valentina_108 [34]

Set 7x-4 and 31 equal to each other
7X-4=31
Add four to both sides
7X=27
X=3
The answer is D

4 0

3 years ago

Read 2 more answers

The physics department of a college has 8 male professors, 11 female professors, 16 male teaching assistants, and 6 female teach

Lera25 [3.4K]

To determine the probability that one or the other circumstances will occur, you will count the number of possible outcomes and divide it by all the possible outcomes.

#of female teaching assistants + # of male teaching assistants + # of female professors

6 + 16 + 11 = 33

Total = 41

33/41 = 80

There is a approximate 80% probability that one or the other will occur.

6 0

3 years ago

Read 2 more answers

A goal keeper saved 5 out of 50 shots what is the chance that he will save the next shot

Anna [14]

Answer:

10%

Step-by-step explanation:

i think

6 0

3 years ago

Samantha's notebook has 14 pages more than three times as much as Lisa's notebook. If Samantha's notebook has 260 pages , how ma