Answer:
17.5 cm
Step-by-step explanation:
Multiply 0.7 by 25 to get 17.5 cm.
Hope it helped.
Answer:
It b
Step-by-step explanation:
Answer:
x = - 5, x = 2
Step-by-step explanation:
Using the rules of logarithms
log x - log y = log (
)
x = n ⇔ x = 
note that log x =
x
Given
log (x² + 3x) - log10 = 0, then
log(
) = 0, thus
=
= 1 ( multiply both sides by 10 )
x² + 3x = 10 ( subtract 10 from both sides )
x² + 3x - 10 = 0 ← in standard form
(x + 5)(x - 2) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 5 = 0 ⇒ x = - 5
x - 2 = 0 ⇒ x = 2
Solution is x = - 5, x = 2
Answer: x = 15, 95 degress, 85 degrees
Step-by-step explanation:
(2x + 65) + (3x+40) = 180
5x +105 = 180
5x = 75
x = 15
2 (15) +65 = 95 deg
3 (15) +40 = 85 deg