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3 years ago

Whats the algebraic expression that describes 1, 4, 7, 10, 13. And how?

Mathematics

1 answer:

bearhunter [10]3 years ago

5 0

The answer would be c)x+3 because if you substitute 1 for x, the expression would be 1+3 and it comes out as 4. Also, if you substitute 4 for x the expression would be 4+3 which comes out to 7

Hope this helps!

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Erica knits 18 squares on Monday. She knits 7 more squares each day for the rest of the week. How many squares does Erica have

Ne4ueva [31]

She knits 18 squares on Monday.
Then she knits 7 more squares each day:
Tuesday: +7, Wednesday: +7, Thursday: +7 and Friday: +7
18 + 7 * 4 = 18 + 28 = 46
Answer: She has 46 squares on Friday.

7 0

3 years ago

Factor the expression completely. 625x4 - 256y4

scoundrel [369]

Answer:

(625 • (x4)) - 28y4

54x4 - 28y4 3.1 Factoring: 625x4-256y4

Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)

Proof : (A+B) • (A-B) =

A2 - AB + BA - B2 =

A2 - AB + AB - B2 =

A2 - B2Note : AB = BA is the commutative property of multiplication.

Note : - AB + AB equals zero and is therefore eliminated from the expression.

Check : 625 is the square of 25

Check : 256 is the square of 16

Check : x4 is the square of x2

Check : y4 is the square of y2

Factorization is : (25x2 + 16y2) • (25x2 - 16y2) 3.2 Factoring: 25x2 - 16y2

Check : 25 is the square of 5

Check : 16 is the square of 4

Check : x2 is the square of x1

Check : y2 is the square of y1

Factorization is : (5x + 4y) • (5x - 4y)this is the answer: (25x2 + 16y2) •(5x + 4y) • (5x - 4y)

5 0

3 years ago

What is the slope-intercept form of the equation of the line that contains the points (3, 8) and (6,5) ?

Rashid [163]

The answer is y=-1x +11

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3 years ago

I NEED HELP PLZ!!!!!! 20 POINTS

Amanda [17]

Answer:

1 is c

2 is d

3 is a

Step-by-step explanation:

Sorry it took a bit not pretty good at these but i used an app called desmos and it basically gives the answer

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3 years ago

Ugh geez can ANYONE help with 2 questions????????????

just olya [345]

What's the 2 question

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3 years ago