Answer:
$3.00
Step-by-step explanation:
Setting up an equation with a variable and using key words from the problem will allow you to solve for the sum of money.
'x' = sum money
'nine tenths of a sum' =
'is 2.70': = 2.70
=2.70
Multiply both sides by the reciprocal of 9/10 (10/9):
(10/9)(9/10)x = 2.70(10/9)
x = 27/9 = $3.00
Answer:
x = 5
Step-by-step explanation:
x + 5 = {Midpoint theorem}
2(x+ 5) = x² - x
2x + 10 = x² - x
x² - x - 2x - 10 = 0
x² - 3x - 10 = 0
x² - 5x + 2x - (5*2) = 0
x(x - 5) + 2(x - 5) = 0
(x -5)(x + 2) = 0
{x + 2 is ignored because measurement could not be in negative value}
x - 5 = 0
x = 5
Answer:
x ≈ 7.4
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos22° = =
Multiply both sides by 8
8 × cos22° = x, thus
x ≈ 7.4 ( to the nearest tenth )