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kvv77 [185]
3 years ago
13

The sum of two numbers is 85. twice one number plus four times the other is 218. find the numbers

Mathematics
1 answer:
Nina [5.8K]3 years ago
6 0
X + y = 85
2x + 4y = 218
x = 85 - y 
<span>2(85 - y) + 4y = 218 </span>
<span>170 - 2y + 4y = 218 </span>
<span>170 + 2y = 218 </span>
<span>2y = 48 </span>
<span>y = 24 </span>
<span>x = 61</span>
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The response variable in the study that Ann has done here can be said to be Time spent exercising.

<h3>What is a response variable?</h3>

This is the name that is used to refer to the dependent variable. This is the variable that is of interest in the study. The goal is to see the changes that occurs in the particular variable based on the actions that another variable would have such as the independent variable.

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8 0
1 year ago
Find f(12) = 3/4 x + 2
AlekseyPX

Answer:

f(12) = 11

Step-by-step explanation:

To solve this question:

  1. Substitute x = 12 into the equation: f(12) = 3/4 (12) + 2
  2. Simplify: 3/4 × 12 = 36/4 which is 9 → f(12) = 9 + 2
  • f(12) = 11

Hope this helps!

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