The answer is 15

these chords are congruent because the radius of the circle are perpendicular to the them
so we can find EF by making an equation:
$3x + 5 = x + 35 \\ 3x - x = 35 - 5 \\ 2x = 30 \\ x = \frac{30}{2} = 15$

so EF is = 3(15)+5=50
good luck

6 0

3 years ago

Solve the logarithmic equation . Round the answer to four decimal places . 2^x =25

levacccp [35]

Answer:

x = 4.6439

Step-by-step explanation:

2^x =25

Take the log of each side

log 2^x = log 25

We know that log a^b = b log a

x log 2 = log 25

Divide each side by log 2

x = log 25 / log 2

x =4.643856

Rounding to 4 decimal places

x = 4.6439

8 0

2 years ago

Read 2 more answers

3x^2 - x - 10

kramer

One way is to factor it
trial and error, with experience
(3x+5)(x-2)

answer is C

7 0

3 years ago

Read 2 more answers