Solve using substitutuion

(Question 1)

2x - 7y = - 2

2x + y = 14

(Question 2)

8x - 7y = 17

-x + y = - 3

What number could be added to 0.40 mL for the level of precision to be 0.01mL

The total output from a production system in one day is 700 units and the total labor necessary to produce the 700 units is 350 hours.

The price of a stock, A (x), over a 12-month period decreased and then increased according to the equation A (x) = 0.75x^2 - 6x + 20, where x represents the number of months.

Can a triangle have one obtuse angle and one right angle? Explain.

Find the nth term of the sequence 10, 15, 20, 25

Javier has 15 straws mindy has 3 more straws than javier how many straws do they have together

I what to learn how to cross muilpe

6⁄5 * 1 3⁄4 * 2 3⁄2 =

The probability that a wildcat well will be productive is 1/13. Assume that a group is drilling wells in various parts of the country so that the status of one well has no bearing on that of any other.

Can you simplify this expression [3+4*8 - (16/4+10) ]