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emmainna [20.7K]
3 years ago
7

O suma de bani a fost cheltuita astfel : In prima zi 10 la suta din suma In a 2-a zi 30 la suta din rest si au mai ramas 40 lei

. Aflati suma initiala . [ probleme cu procente ]
Mathematics
1 answer:
Shtirlitz [24]3 years ago
8 0
For All Who Speak English

<span>A sum of money was spent as follows: On the first day 10 percent of the amount in the 2nd rest day and 30 percent of the remaining 40 lei. Learn initial amount. [Trouble cent]
</span>The Initial Amount is 0.00075.



<span>Suma inițială este de 0,00075.</span>
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Find the common ratio of the geometric sequence 11, -55, 275,...11,−55,275,...
Kaylis [27]

Answer:

r = -5

Step-by-step explanation:

common ratio (r) is found be dividing one term by its preceding term:

r = 275 ÷ -55 = -5

or, r = -55 ÷ 11 = -5

Therefore, r = -5

3 0
2 years ago
Troy Ulman received his annual savings account statement, showing $78.75 in interest. If his savings account balance was $2,100
Naya [18.7K]
Answer is 3.75%

3.75% = 0.0375

0.0375 + $2,100 = <span>$78.75</span>

4 0
3 years ago
YO PLZ HELP!! MARKING BRAINIEST!!
Yuliya22 [10]

Answer:

x = 26, 16

Step-by-step explanation:

( x-21) ^2 = 25

Take the square root of each side

sqrt(( x-21) ^2) = ±sqrt(25)

x-21 = ±5

Add 21 to each side

x-21+21 = 21±5

x = 21±5

x = 21+5  and x = 21-5

x = 26, 16

8 0
3 years ago
The equation ​yˆ=−6.2x2+41.5x−5.6​ approximates the average number of cars that pass through an intersection x hours after 3:00
Neko [114]

Answer:

59

Step-by-step explanation:

5: 30 pm is 2.5 hours after 3 : 00 pm

Substitute x = 2.5 into the equation

y = - 6.2(2.5)² + 41.5(2.5) - 5.6

  = - 38.75 + 103.75 - 5.6

  = 59.4

The average number of cars is 59

8 0
3 years ago
The population in the trapezoid-shaped region shown is about 3000 people. How many people are there per square mile?
Anastasy [175]

Answer: \frac{3,000}{A}

Step-by-step explanation:

<h3> Since the figure is not attached, below you can see a general explanation of the procedure to solve the exercise: </h3>

For this exercise you can apply the following formula, which is used to calculate the area of a trapezoid:

A=\frac{h(B+b) }{2}

Where  "B" and "b" are the bases of the trapezoid and "h" is the height.

So, substituting values into the formula and evaluating, you can find the area of  trapezoid-shaped region.

Since the population in the trapezoid-shaped region is about 3,000 people, you can find the number of people per square mile dividing the population by the area of the region.

Then, the following expression represents the number of people per square mile in that region:

\frac{3,000}{A}

7 0
3 years ago
Read 2 more answers
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