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lapo4ka [179]
2 years ago
6

-19-(k + 7) + 10k I need help on this you have to simplify the expression

Mathematics
1 answer:
Step2247 [10]2 years ago
3 0

Answer: =9k−26

Step-by-step explanation:

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the sum of three numbers is 79. The second number is 5 times the first, while the third is 16 more than the first. Find the numb
swat32
Let the 1st number be x; 2nd number be y; 3rd number be z.

x + y + z = 79

x = number we are looking for.
y = x * 5 ==> 5 times the first
z = x + 16 ==> 16 more than the first

Therefor,

x + (x * 5) + (x+16) = 79

1st step, multiply the 2nd number: x * 5 = 5x

x + 5x + x + 16 = 79

Add all like numbers:

7x + 16 = 79

To get x, transfer 16 to the other side and change its sign from positive to negative.

7x = 79 - 16
7x = 63

To get x, divide both sides by 7

7x/7 = 63/7
x = 9

To check. Substitute x by 9.

x + (x * 5) + (x+16) = 79

9 + (9 * 5) + (9 + 16) = 79
9 + 45 + 25 = 79
79 = 79 equal. value of x is correct.

3 0
3 years ago
1. A coin is tossed and a single die is rolled. What is the theoretical
Vera_Pavlovna [14]

Answer:

A

Step-by-step explanation:

The chance the coin will show 'tails' is 1/2, since there are only 2 sides to a coin. The chance that the die will show an even number is also 1/2, since half of the numbers on a die are even, and half are odd. But, since both of these events depend on each other, or in other words, are dependent, we have to multiply both numbers. 1/2 x 1/2 = 1/4, therefore your answer is A.

5 0
2 years ago
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Help me plz it's due tomorrow
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5) 25 Degree

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The perimeter of a square can be expressed by the function f(s) = 4s, where s is the length of the side in inches.
weeeeeb [17]

Answer:

Mathematical domain is all numbers, as all numbers can be multiplied by 4. However, this is not reasonable as negative lengths don't exist, so the reasonable domain would be all positive numbers.

7 0
2 years ago
The length of a rectanglen is 2/5 meter. Its width is 1/4 of its length. What is the perimeter of the rectangle
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Please see the pic, I'd solved in it.

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3 years ago
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