There are 3 questions and they are on each picture, I don't understand these so please help!

Mathematics

1 answer:

Lilit [14]3 years ago

8 0

2A. Answer is 42.7. C squared minus B squared equals A squared. C^2 - B^2 = A^2. 48^2 - 22^2 = 42.66^2.

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Ramon rented a sprayer and a generator on his first job he used each piece of equipment for 6 hours at a total cost of $90 on hi

Oliga [24]

Given:
Sprayer and generator

1st Job: 6 hours each for a total of $90
2nd Job: 4 hours sprayer and 8 hours generator for a total of $100

Let x = spayer ; y = generator

6x + 6y = 90
4x + 8y = 100

6x = 90 - 6y
x = 90/6 - 6y/6
x = 15 - y

4x + 8y = 100
4(15-y) + 8y = 100
60 - 4y + 8y = 100
4y = 100 - 60
4y = 40
y = 40/4
y = 10

x = 15 - y
x = 15 - 10
x = 5

Sprayer = 5 per hour ; generator = 10 per hour

To check:
6x + 6y = 90
6(5) + 6(10) = 90
30 + 60 = 90
90 = 90

4x + 8y = 100
4(5) + 8(10) = 100
20 + 80 = 100
100 = 100

5 0

3 years ago

In the last year, a total of 2727 earthquakes occurred in the country. Of these, 85.3 % were minor tremors with magnitudes of

Komok [63]

Answer:

Minor earthquakes occurred in the country in the last year were 2326.

Step-by-step explanation:

Given:

In the last year, a total of 2727 earthquakes occurred in the country.

Of these, 85.3 % were minor tremors with magnitudes of 3.9 or less on the Richter scale.

Now, to find the minor earthquakes occured in the country last year.

Total earthquakes occurred in the country = 2727.