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dusya [7]
2 years ago
14

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

Mathematics
2 answers:
Serggg [28]2 years ago
7 0

Answer:

16 was right

Step-by-step explanation:

Ipatiy [6.2K]2 years ago
5 0

Answer:

16

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

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Which values of k are solutions to the inequality StartAbsoluteValue negative k minus 2 EndAbsoluteValue less-than 18? Check all
Stella [2.4K]

Answer:

You could just replace all the given possible values of k in the inequality and see which ones are solutions, but let's solve this in a more interesting way:

First, remember how the absolute value works:

IxI = x if x ≥ 0

IxI = -x if x ≤ 0

Then if we have something like:

IxI < B

We can rewrite this as

-B < x < B

Now let's answer the question, here we have the inequality:

I-k -2I < 18

Then we can rewrite this as:

-18 < (-k - 2) < 18

Now let's isolate k:

first, we can add 2 in the 3 parts of the inequality:

-18 + 2 < -k - 2 + 2 < 18 + 2

-16 < -k < 20

Now we can multiply all sides by -1, remember that this also changes the direction of the signs, then:

-1*-16 > -1*-k > -1*20

16 > k > -20

Then k can be any value between these two limits.

So the correct options (from the given ones) are:

k = -16

k = -8

k = 0

6 0
2 years ago
Read 2 more answers
Midpoint anyone
Natali [406]

Answer:

The answer is S(1,8)

Step-by-step explanation:

.

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4 0
3 years ago
A cubical reservoir has capacity of 480000 l itters of liquid. If ifs length and breadth are 10m and 8m respectively, find the h
sertanlavr [38]

Answer:

Height = 6000 m

Step-by-step explanation:

Volume = length \times breadth \times height \\\\480000 = 10 \times 8 \times  height\\\\480000 = 80 \times height\\\\height = \frac{480000}{80} =  6000 \ m

5 0
3 years ago
P = 215(1.005)t/3
Reil [10]

Answer:

(D) 36

Step-by-step explanation:

0.5%  = 0.5/100  =  0.005

It is given that the population (215) is predicted to increase by 0.5%. To know the value after increment, 215 has to be multiplied by (1 + 0.005) or 1.005.

In the equation P  =  215(1.005)t/3, the value of t/3 has to be equal to 1 for 0.5% increase.

t/3  =  1

t  =  3 years

Convert years to months.

n  =  3 ⋅ 12 months

n  =  36 months

The correct option is D.

Thanks!

Mark me brainliest!

6 0
2 years ago
Andrea gets a monthly allowance. She first spends a fourth of her money on Target. Then, she spends $5 on food. She has $12 left
motikmotik

Answer:

68

Step-by-step explanation:

12 + 5 = 17

17 x 4 = 68

Andrea's monthly allowance is $68.

5 0
2 years ago
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