3 years ago

31 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Tresset [83]3 years ago

3 0

Answer:

5 min

Hungarian 3.6 min

Polish nearly 1.4 min

270/190=1.4

5-1.4=3.6 min

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Convert 5,628,457 to scientific notation

Oliga [24]

Answer:

5.628547 x 10 to the 6th power

7 0

4 years ago

I need help with this two questions.

mezya [45]

Always get rid of denominators first. Multiply both right and left side by 6
-7 (6) = -c (6)/6 + 12(6)
-42 = -c + 72
c = 72 +42
c = 114

rearrange like terms together
42 = 18 - 4x
4x = 18 -42
4x = -24
divide both sides by 4
x = -6

8 0

4 years ago

27^x = 9^x − 4 Question 1 options: x = 8 x = 4 x = −4 x = −8

Mariulka [41]

Answer:

x = -8

Step-by-step explanation:

Given the equation:

$27^x=9^{x-4}$

Note that

$27=3^3\\ \\9=3^2,$

then

$27^x=(3^3)^x=3^{3x}\\ \\9^{x-4}=(3^2)^{x-4}=3^{2(x-4)}$

Rewrite the equation as

$3^{3x}=3^{2(x-4)},$

then

$3x=2(x-4)\\ \\3x=2x-8\\ \\3x-2x=-8\\ \\x=-8$

4 0

4 years ago

In the diagram, the length of segment BC is 23 units. What is the length of segment DC? 3 units 8 units 13 units 33 units

Maksim231197 [3]

based on the drawing both sides are the same length

so knowing BC = 23 you need to find the value of x and put it in the formula for the side

23=2x+7

16 = 2x

x=8

4x+1 = 4(8)+1 = 33 units

8 0

4 years ago

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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