Malik used these steps to solve the system of equations. 2 x + 4 y = 20. 5 x minus 3 y = 11.

Step 1 6 x + 12 y = 60. 20 x minus 12 y = 44.
Step 2
Step 3 x = 4
Step 4 2 (4) + 4 y = 20. 8 + 4 y = 20. 4 y = 12. y = 3.
Step 5 The solution is (4, 3).

What needs to be done in step 2?
Divide both sides of the equations in step 1 by the same number to eliminate one variable.
Multiply both sides of the equations in step 1 by the same number to eliminate one variable.
Add the equations in step 1 to eliminate one variable.
Subtract the equations in step 1 to eliminate one variable.

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

3questions show how you solved the problem 1. subtract & simplify (–y2 – 4y – 8) – (–4y2 – 6y + 3) 2.multiply and simplify 2x2y3z2 · 4xy4x2 3.multiply and simplify (x – 4) (x2 – 5x – 6)

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to