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ikadub [295]
3 years ago
7

Felipe finished his history assignment in 2/5 hours. Then he completed his math assignment in 3/4 hours . How much more time did

Felipe spend on his math assignment?
Mathematics
1 answer:
Paha777 [63]3 years ago
3 0

Answer:

Step-by-step explanation:

You have to find the GCF aka greatest common factor, then subtract those fractions. And if able to , simplify ur answer. but sometimes it might not be there

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Use the difference of two squares identity to factor each of the following expressions. (a) x²-81 (b) (3x+y)² -(2y)² (c) 4-(x-1)
ioda

Answer:

a) x^2-9^2=(x+9)(x-9)

b) (3x+y)^2-(2y)^2=(3x+3y)(3x-y)

c) 2^2-(x-1)^2=(1+x)(3-x)

d) (x+2)^2-(y-2)^2=(x+y)(x-y+4)

Explanation:

Factor the expression using difference of two squares.

Formula:

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

Part a)  x²-81

write 81 as perfect square.

x^2-9^2

a\rightarrow x

b\rightarrow 9

x^2-9^2=(x+9)(x-9)

Part b) (3x+y)² -(2y)²

a\rightarrow 3x+y

b\rightarrow 2y

(3x+y)^2-(2y)^2=(3x+y+2y)(3x+y-2y)

(3x+y)^2-(2y)^2=(3x+3y)(3x-y)

Part c) 4-(x-1)²

write 4 as perfect square,

2^2-(x-1)^2

a\rightarrow 2

b\rightarrow x-1

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

2^2-(x-1)^2=(1+x)(3-x)

Part d) (x+2)²-(y-2)²

a\rightarrow x+2

b\rightarrow y-2

(x+2)^2-(y-2)^2=(x+2+y-2)(x+2-y+2)

(x+2)^2-(y-2)^2=(x+y)(x-y+4)

4 0
3 years ago
Can someone give me a step by step explanation because my teacher doesn’t teach us anything? :(
Alex

Answer:

(7x^2 -1)(x - 2).

Step-by-step explanation:

7x^3 - 14x^2 - x + 2

We can factor this by grouping - that is factoring the first 2 terms and the last 2:

= 7x^2(x - 2)  - 1(x - 2)      <-- the x - 2 is common to both parts so we have:

(7x^2 -1)(x - 2).

7 0
2 years ago
Writing to. Explain. Braedyn. Needs to determine how many nickels. Are. In. $7.45. Explain. How she. Can. Find. The. Number. Of.
vladimir2022 [97]
First how much does the nickels worth?

It worths 5 cents Which is .5 in decimal and now you got to divide 

So divide 7.45 over .5 how much is that ?

7.45/.5=14.9

There are approximately 15 nickels.

8 0
3 years ago
Read 2 more answers
5. A soccer ball is kicked from the ground level with an upward velocity of 60 feet per second. The
elixir [45]

Answer:

-16(1)^2+60(1)= -16+60=44

Step-by-step explanation:

6 0
3 years ago
Josh and Lucy share some money in the ratio of 3 : 7 they share 84 in total how much money does Josh receive
Ann [662]
27.30 is the answer
7 0
3 years ago
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