Jake and abigail worked a job together. jake earned 3/4 of what abigail did. together they earned $140. how much did each earn?

Let's represent Jake with the variable 'j' and Abigail with the variable 'a':

j = 3a/4

j + a = 140

j = -a + 140

3a/4 = -a + 140

3a = -4a + 560

7a = 560

a = 80

Abigail earned $80 and Jake earned $60

Abigail: x

Jake: 3/4x

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Make their expressions add up to 140 in an equation.

(x) + (3/4x) = 140

Combine like terms.

1 3/4x = 140

Divide both sides by 1 3/4.

x = 80

Plug 80 for x into Jake and Abigail's expressions.

Jake: 3/4(80) = 60

Abigail: (80) = 80

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Jake earned $60 and Abigail earned $80.

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

$113.42

i hope that is right.

step-by-step explanation: