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kolezko [41]
4 years ago
10

Which value of x from the set {5,6,7,8} makes this equation true? 3x = 24

Mathematics
1 answer:
N76 [4]4 years ago
3 0
The answer is 8 because when you replace x by 8 it equals 24
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Laura has 45 buttons. She gives away b buttons. Write an expression that shows the number of buttons Laura has left.
USPshnik [31]
Giving away indicates subtraction. Therefore, the expression is 45 - b.
6 0
3 years ago
Read 2 more answers
Un número consta de dos cifras cuya suma es 9.Si se invierten el orden de las cifras el resultado es igual al número dado más 9
Dominik [7]

Answer:

45

Step-by-step explanation:

A number consists of 2 digits whose sum is 9 => x + y = 9

If the order of the numbers is inverted, the result is equal to the given number plus 9 units => (10*y + x) + 9 = (10*x + y)

Thus:

x + y = 9  => multiply by -9 => 9*y + 9*x = 81

10*y + x + 9 = 10*x + y =>  9*y - 9*x = -9

We are left then that:

9*y + 9*x = 81  (1)

9*y - 9*x = -9  (2)

we add both equations

18y = 72

y = 72/18 = 4

replacing

x + y = 9

x + 4 = 9

x = 5

Therefore the number is (10y + x) => (10 * 4 + 5) => 45

4 0
3 years ago
How do we multiply numbers
zavuch27 [327]

To multiply a number, simply take a number (Let's say 4) and another number (Let's say 3). If you multiply 4 by 3, you are simply taking the number 4, and adding it to itself 3 times (4 + 4 + 4).

I hope this makes sense, please tell me if you need some more information.

Hope this helps!

7 0
4 years ago
Find the value of x.
kondor19780726 [428]
Use triangle calculator
8 0
3 years ago
$650 is invested in an account at 3%
o-na [289]

Answer:

Step-by-step explanation:

Simple interest = 650*\frac{3}{100}=$19.5

End of first year = 650+19.5 = $669.50

End of second year = 669.50+19.5 = $ 689

End of third year = 689+19.5 = $708.50

End of fourth year = 708.50 +19.5 = $ 728

End of fifth year = 728 +19.5 = $747.50

8 0
4 years ago
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