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torisob [31]
3 years ago
13

Choose a variable to represent one of the unknowns. Express the remaining unknowns in terms of the variable you chose in step 1.

Look for a relationship between the unknowns given in the problem. Write an equation. (Look for the other relationship given in the problem.) The tens digit of a number is twice the ones digit. The sum of the digits in the number is 12. What is the number? Include the entire process for establishing a set of equations, the solution, and an explanation of what the solution means in terms of the variables. Complete your work in the space provided.
Mathematics
1 answer:
liberstina [14]3 years ago
7 0

Answer:

ye

Step-by-step explanation:

ye

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Answer:

1) 34 square meters

2) 21 square yards

Step-by-step explanation:

1) 7x4=28

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28+6= 34 square meters

2)3x3=9

1/2x3x2x4=12

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Step-by-step explanation: hope this help

3 0
3 years ago
From a point p on level ground, the angle of elevation of the top of a tree is 60°. If the tree is 39m high, how far is its base
zzz [600]
Hello,

tan 60°=√3
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5 0
4 years ago
If the coefficient of determination is 0.9, the percentage of variation in the dependent variable explained by the variation in
vagabundo [1.1K]

Answer:

90% of the variation in the dependent variable is explained by the independent variable.

Step-by-step explanation:

We are given the following in  the question:

coefficient of determination = 0.9

We have to find the percentage of variation in the dependent variable explained by the variation in the independent variable.

Coefficient of Determination:

  • The coefficient of determination is a measure that explains and predicts the dependent variable.
  • It explains the variation in the dependent variable caused by the independent variable.
  • The coefficient of determination, also known as the R squared value and is obtained by squaring the coefficient of correlation.

\text{Coefficient of Determination} = R^2 = 0.9 = 0.9\times 100\% = 90\%

Thus, 90% of the variation in the dependent variable is explained by the independent variable.

8 0
3 years ago
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