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2 years ago

Solve for r. r/5 = -9

Mathematics

2 answers:

frosja888 [35]2 years ago

7 0

Answer:

r = -45

Step-by-step explanation:

in order to get r by itself you must multiply both sides by 5. afterwards you should get -45 because 5 * -9 = -45

harkovskaia [24]2 years ago

4 0

R=-45 because you multiply both sides by 5

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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)

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2 years ago

What is the solution to this system of linear equations?

GarryVolchara [31]

Answer:

I got (1,2).

Step-by-step explanation:

Process of elimination:

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Plug 2 into second equation for Y to get x=1

(1,2)

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2 years ago

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Zolol [24]

Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

PLZ HELP ASAP

svet-max [94.6K]

Answer is D:
e + 5 = 3e - 11

2e = 16
e = 8

Ella is 8 years old
Jamie is 8+5 = 13 years old

6 0

2 years ago