4(7-x)=5(x+2)
how would you solve this i’m comfused on this one.

ANSWER:

STEP:

Multiply the parenthesis by the number before.

28-4x=5x+10

Add 4x to both sides.

28-4x=5x+10

28=9x+10

Subtract 10 from both sides.

18=9x

Divide both sides by 9.

2=x

48 / 6 = x

in this case, x will equal the amount of money in each card!

x therefore will be 8.

trent had $8 in each birthday card.

(a) {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …}

(b) $59 398

step-by-step explanation:

(a) the annual sequence of profits

aₙ = a₁rⁿ⁻¹

the model for the sequence of profits is {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …} .

(b) profit after 15 yr

  a₁ = $ 30 000

  r = 1.05

a₁₅ = 30 000 × 1.05¹⁴

a₁₅ = 30 000 × 1.979 93

a₁₅ = $59 398

the profit in year 15 will be $59 398.