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prohojiy [21]
3 years ago
7

Use log to solve for x: 38^2x=109

Mathematics
1 answer:
Ksju [112]3 years ago
8 0
38^2x = 109
Apply lg on both sides
lg 38^2x = lg 109
Bring the power down
2x lg 38 = lg 109
2x = lg 109/lg 38
x = (lg 109/lg 38) ÷ 2
= 0.645

Hope it helped!
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What is the answer??​
Gelneren [198K]

Answer:

y= 4x+3

Step-by-step explanation:

To write your equation, solve for the slope.

(y2-y1)/ (x2-x1)

Find two coordinate points from the table.

(0,3) (1,7)

(7-3)/ (1-0)= 4

m=4

Use point-slope equation to find your equation.

(y-y1)=m(x-x1)

(y-3)=4(x-0)

y-3= 4x

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5 0
3 years ago
A nike bag cost $122 if for the holiday it's marked down by 20%. What is the total cost after tax if the tax is 8%
Sindrei [870]
The answer would be 105.41
Explantaion: 122 • 0.2=24.4
122-24.4=97.6
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4 0
3 years ago
A store had 175 cell phones in the month of January. Every month, 10% of the cell phones were sold and 10 new cell phones were s
Elenna [48]

Answer: f(n) = 0.9 × f(n − 1) + 10,   f(0) = 175,  n > 0


Step-by-step explanation:

Given: A store had 175 cell phones in the month of January.

Every month, 10% of the cell phones were sold and 10 new cell phones were stocked in the store.

Let n be the number of months

Then when n=0

f(0)=175

After first month , n=1

The number of cell phone in store=175-10\%\ of\ 175+10

Thus f(1)=f(0)-10\%\ of\ f(0)+10

=f(0)-0.1\timesf(0)+10\\=f(0)(1-0.1)+10\\=f(0)(0.9)+10\\

Similarly we can do till n months, we get

f(n)=0.9×f(n−1)+10, f(0) = 175, n > 0

6 0
3 years ago
Read 2 more answers
You and a friend want to know how much rope you need to climb a large rock. Your friend is 5.5 feet tall and casts a shadow that
diamong [38]
The concept that is useful in order to answer this item is the concept of ratio and proportion. Let x be the height of the rock from the ground. We use the equation below to answer.
                                    5.5 ft / 18 ft = x ft / 209.5 ft
The value of x from the equation is 64 ft. Thus, they will be needing approximately 64 ft of rope.
4 0
3 years ago
A granola recipe calls for 2 1/3 (mixed number 2 and 1/3) cups of almonds. A bag of almonds contains 2 cups. To make 2 1/2 (mixe
marta [7]

Answer:

4 1/6 cups of almonds left

Step-by-step explanation:

Granola recipe = 2 1/3 cups of almonds

2 1/2 batches of granola = 2 1/3 cups of almonds × 2 1/2

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= 7/3 × 5/2

= (7*5)/(3*2)

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A bag of almonds = 2 cups

5 bags of almonds = 10 cups

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= 60-35/6

= 25/6

= 4 1/6 cups

3 0
3 years ago
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