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vichka [17]
3 years ago
11

Which are perfect squares? Check all that apply.

Mathematics
1 answer:
zmey [24]3 years ago
4 0

Answer:16,625,169,9

Step-by-step explanation:

Find the square root of the number and if it’s even and there’s no decimal than it’s a perfect square

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What is the solution to the system of equations?
Natalka [10]

Answer:

x = 1    y = 3    z = 1

Step-by-step explanation:

(1)  x - 3y - z = -9           (2)   -2x + y + 2z = 3        (3)   2x + y + 3z = 8

                                2x(1)     <u>2x - 6y - 2z = -18</u>      (2)  <u>-2x + y + 2z = 3</u>

                                                 - 5y = -15                           2y + 5z = 11

                                                      y = 3                            2(3) + 5z = 11

                                                                                            6 + 5z = 11

                                                                                                  5z = 5

                                                                                                    z = 1

       x - 3(3) - 1 = -9

       x - 9 - 1 = -9

            x - 10 = -9

            x = 1

Note:  If you write your equations across your paper, then the work can just flow down the paper.  It makes it so much easier to show the work you have done.  OK?

5 0
2 years ago
10 ft area of base 62ft 2 (squared)
AleksAgata [21]

Answer:

12

Step-by-step explanation:

3 0
3 years ago
In Jan's library, she has 24 informational books. If 15% of the books are informational text, how many total books are in her li
tatyana61 [14]

Answer:

160 books

Step-by-step explanation:

To find the total amount of something, when given the percent and how much value the percent is, use this

Total = \frac{Number*100}{Percent}

This way we get:

Total = \frac{24*100}{15} = \frac{2400}{15} = 160

Hope this answer helped! :)

6 0
2 years ago
Help please..! I need the answer to this thank you.
torisob [31]

1. The additive identity is 0. This is because adding 0 to anything leads to the same value. Example: 0+3 = 3.

2. An equation is where you have two expressions separated by an equal sign. In your case it would be "a mathematical sentence whose verb is 'equal' (=)"

3. The multiplicative identity is 1. Multiply 1 with any number and the result is that same number. Example: 1*7 = 7.

4. An open sentence is an equation that contains one or more variables. An example would be x+2 = 4. The reason why we call it open is because the true or false nature of the sentence is up in the air until we know what x is. If we knew that x = 3 for instance, then x+2 = 4 would be false since 3+2 = 4 is false. If we nailed down what x was then it would go from open to closed.

5. The symmetric property is that if a = b then b = a. Think of a mirror how the image reverses.

8 0
3 years ago
Solve the system.<br> x + y - z = 17<br> y +z = 1<br> z = -3
Anna35 [415]

Answer:

(10, 4, -3)

Step-by-step explanation:

z = -3

y + z = 1

y - 3 = 1

y = 4

x + y - z = 17

x + 4 - -3 = 17

x + 4 + 3 = 17

x + 7 = 17

x = 10

(10, 4, -3)

3 0
2 years ago
Read 2 more answers
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