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coldgirl [10]
3 years ago
11

7.9y-2-3.2y-10=2.8+y

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
3 0

Answer:

y=4

Step-by-step explanation:

7.9y-2-3.2y-10=2.8+y

group like variables

4.7y -12 = 2.8 +y

isolate the variable (y)

3.7y = 14.8

solve for y through division

14.8/3.7=y

4=y

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Which of the following shows one way to simplify 43Σn=1(3+9n)?
kramer

Based on the given summation notation, the expression that shows one way to simplify 43 Σ n=1 (3+9n) is (a) 43 Σ n=1 3 + 43 Σ n=1 9n

<h3>How to determine the summation expression?</h3>

The expression is given as:

43Σn=1(3+9n)

As a general rule, if a summation notation is represented using the following expression

Σ(a + bn)

The equivalent expression of the above summation notation is

Σa + bn

Where the variable a is a constant in the expression

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Using the above equation as a guide, we have the following equivalent equation

43 Σ n=1 (3+9n) = 43 Σ n=1 3 + 43 Σ n=1 9n

Hence, based on the given summation notation; the expression that shows one way to simplify 43 Σ n=1 (3+9n) is (a) 43 Σ n=1 3 + 43 Σ n=1 9n

Read more about summation notation at:

brainly.com/question/16599038

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