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Tanzania [10]
3 years ago
10

Y - 2x=4 3x -5y =15 ddddddddddd

Mathematics
1 answer:
koban [17]3 years ago
6 0

Answer:

Hope this is right and helps :)

Step-by-step explanation:

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Assume you have a safe code that is 8 digits long. The numbers 0-9 may be used for any digit. How many possible codes are there?
Kisachek [45]

Answer:

10^8 choices

Step-by-step explanation:

You have 10 numbers to choose from for each digit of the code.

There are 8 digits of the code.

You have 10*10*10*10*10*10*10*10 = 10^8 choices in total.

3 0
4 years ago
Riley had to add this group of numbers (56 + 47 + 53), but he wanted to add them as quickly and as easily as possible. Here is h
zysi [14]

Answer:

156

Step-by-step explanation:

first add 47 and 53, then add 100 and 56, then you get your answer.

6 0
3 years ago
3(x + 2) = 18 please help
Iteru [2.4K]

Answer:

3(x+2)= 3*x + 3*2

3x * 6 = 18

Step-by-step explanation:

its easy

3 0
3 years ago
Read 2 more answers
If cos theta =-2/3, which of the following are possible
Dima020 [189]
Well, the cos(∅) is negative in the second and third quadrants.  If you are solving for theta, you would use the inverse of the cos or arccos
cos(x) = ( \frac{-2}{3} ) take the inverse of both sides to get:
x = arccos(-2/3) now evaluate the right
x = 131.8103149 degrees
to find your second solution, subtract your reference angle from 360 degrees.
360 - 131.8103149 = 228.1896851 degrees

Now the period of cos is 2π or 360 degrees. So if you want to consider all possible solutions, you would need to add/subtract 360n to both solutions above.. 

Not sure if this is what you're looking for, but thought I would leave it here for you just in case... As a side note, you could do this problem in radian measurement as well.
6 0
3 years ago
Students in Jay's school plant vegetables in one of the rectangular gardens with length 90 feet and width 7 1/2 feet. What are t
luda_lava [24]

convert 7 1/2 to a decimal which becomes 7.5 and here are the 3 different expressions to find the garden's perimeter.

1) p= 2(l + w)

2) p= 2 x 90+ 2 x 7.5

3) p= 90 + 7.5 + 90 + 7.5


7 0
3 years ago
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