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Irina-Kira [14]
3 years ago
12

Alex is 22 years older than Lana. Four years ago Lana’s age was one-half of Alex’s current age. How old was Alex four years ago?

Mathematics
2 answers:
katen-ka-za [31]3 years ago
7 0

Answer:

33

Step-by-step explanation

22 divided by 2 is 11

it says four years ago so add 11 and 4 and that equals 15

she is 15 right now. then add 22 which is 37 and subtract 4 which your answer would be 33

icang [17]3 years ago
3 0

22 divided by 2 is 11

it says four years ago so add 11 and 4 and that equals 15

she is 15 right now. then add 22 which is 37 and subtract 4 which your answer would be 33

33 is the answer.

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Step-by-step explanation:

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in case of rational numbers.

<h2>hope it helps.</h2><h2>stay safe healthy and happy.</h2>
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Solve the following system for y: 2x – 15y = –10 –4x + 5y = –30
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Please help! 20 points
Bas_tet [7]

Substitute each value in:

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4 0
3 years ago
Read 2 more answers
Simplify.<br> -5x^4(-3x^2+4x-2)
Amiraneli [1.4K]

Answer:

3x^6 - 4x^5 + 2x^4

Step-by-step explanation:

Given

-5x^4 ( -3x^2 + 4x - 2)

Step 1 : open the bracket with -5x^4

-5x^4 * -3x^2= 15x^6

Hint: - * - = +

x^4 * x ^2 = x^ 4+2 = x^6

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Hint: - * + = -

x^4 * x = x^4 + 1 = x^5

(x is always raise to the power of 1 but we don't write it or less it is greater than 1 e.g. 2 , 3 ,4, ..........)

-5x^4 * -2 = 10x^4

Hint: - *- = +

Let's combine the answers

15x^6 - 20x^5 + 10x^4

We can look for a factor that can go through as in that can divide all without a reminder

Factors of

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1 * 15

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2 *10

1 * 20

10 - 2*5

1 * 10

Since the factor of 5 is common in all, so we are using 5 to divide through

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Using 5 to divide through

15x^6 / 5 - 20x^5 / 5 + 10x^4 / 5

= 3x^6 - 4x^5 + 2x^4

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3 years ago
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Fudgin [204]
If you mean half as in 1/2, then yes, 0.31 is less than half because 1/2 as a decimal is 0.50. 

Make me brainliest answer if this helped you!
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