19. Why are the substitution and elimination methods necessary when we already know how to solve systems of linear equations using the graphing method?

two triangles are complementary. the measure of the larger angle is 26 degrees more than three times the measure of the smaller angle. what is the measure of each angle?

Set up the system of equations and then solve it by using an inverse matrix. One safe investment pays 10% per year, and a more risky investment pays 18% per year.

Devide this fraction 5: 1/2

If you multiply me by 2, I become a number greater than 20 and less than 40. if you multiple me by 6 I end in 8

Use a multiplication table to write two ratios that are equivalent to 6/8

At most restaurants, the more food you order, the more money you have to pay. This is true whether you go to an overpriced "gourmet" restaurant where the plates are tiny but very expensive, or to a cafeteria where the portions are huge and the

What's the inequality of 4n-8<40

Fill in the blank to make the two fractions equivalent. 5/9 = / 36

Given that a, b, and c are non-zero real numbers and a + b ≠ 0, solve for x. ax + bx - c = 0

What value should be added to both sides of the equation X2 + 12 X + 6 equals - 5 to solve the question by completing the square