What value of x satisfies this equation? log(5x+20)=2

Mathematics

2 answers:

Serggg [28]3 years ago

7 0

Answer:

16 was right

Step-by-step explanation:

Ipatiy [6.2K]3 years ago

5 0

Answer:

Step-by-step explanation:

Given expression:

log(5x + 20) = 2

From the given expression, we are to find x;

Using the rule of logarithm, we can solve this problem;

logₐb = C

b = Cᵃ

So;

log(5x + 20) = 2

this is to base 10;

5x + 20 = 10²

5x = 100 - 20

5x = 80

x = 16

You might be interested in

Please help! will give brainliest !!

Veseljchak [2.6K]

Answer:

1, 2, 8, 128, 32768

Step-by-step explanation:

$recursive \: formula: \\ a _{n} = 2. {( a_{n - 1} )}^{2} \\ \\ a _{1} = 1...(given) \\ \\ a _{2} = 2. {( a_{2 - 1} )}^{2} = 2 {(a _{1} )}^{2} = 2 {(1)}^{2} \\ \\ a _{2} = 2\\ \\a _{3} = 2. {( a_{3 - 1} )}^{2} = 2 {(a _{2} )}^{2} = 2 {(2)}^{2} \\ \\ a _{3} = 8\\ \\a _{4} = 2. {( a_{4 - 1} )}^{2} = 2 {(a _{3} )}^{2} = 2 {(8)}^{2} \\ \\ a _{4} = 128\\ \\a _{5} = 2. {( a_{5 - 1} )}^{2} = 2 {(a _{4} )}^{2} = 2 {(128)}^{2} \\ \\ a _{5} = 32,768\\ \\$

Thus the first five terms are: 1, 2, 8, 128, 32768.

5 0

3 years ago

Which choice is more than 11 but less than 12?

kumpel [21]

Let
x--------> the number

we know that
11²=121
12²=144

then
x² must be greater than 121 and less than 144

case a) √115
if x=√115
then
x²=115-------> is not greater than 121

case b) √121
if x=√121
then
x²=121-------> is not greater than 121

case c) √136
if x=√136
then
x²=136-------> is greater than 121 and is less than 144------> is ok

case d) √150
if x=√150
then
x²=150------> is not less than 144

therefore

the answer is
√136

8 0

3 years ago

Read 2 more answers

Find the midpoint between (-1, -1) and (-9,6).?

ryzh [129]

Answer:

(-5,-3.5) is the midpoint

Step-by-step explanation:

See photo for the step-by-step explanation