Answer:
y = x² + x - 12
Step-by-step explanation:
Given the solutions are x = - 4 and x = 3, then the factors are
x(x - (- 4)) and (x - 3), that is (x + 4) and (x - 3)
The equation is then the product of the factors
y = (x + 4)(x - 3) ← expand using FOIL
= x² - 3x + 4x - 12
= x² + x - 12 ← in standard form
Answer:
The sides of a triangle are 8 cm, 11 cm and 13 cm. What is its area? 9. The sides of a triangle are 15 cm, 17 cm and 8 cm. What is its area? 10. The sides of a triangle are in the ratio of 3 : 4 : 5. If its perimeter is 36 cm, then what is its area? 1. D 2. B 3. A 4. B 5. C 6. A 7. C 8. A 9. C 10. B
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
5 = 40
1 = x
Then we multiply by the rule of crisscrossing
5 x X = 40 x 1
5x = 40 then divide both by 5
X = 8
Answer:
1080 notebooks
Step-by-step explanation:
30×36 You can simplify this...
3*36=108
108×10=1080
The answer for -14+19 is 5