Answer:
100 - 4q²
Step-by-step explanation:
(10 - 2q)(10 + 2q)
each term in the second factor is multiplied by each term in the first factor.
10(10 + 2q) - 2q(10 + 2q) ← distribute parenthesis
= 100 + 20q - 20q - 4q² ← collect like terms
= 100 - 4q²
18= +5+x
x=3
If you do 3•5, you get 15.
Then do 3+15, you get 18.
Answer:
20, increased, Bianca
Step-by-step explanation:
First one:
He is shown to have travelled 20km in 1 hour, so that's 20km/h.
Second:
The gradient is how steep the curve is, the steeper the faster the person is travelling. Due to the fact Bianca's curve becomes steeper, it shows she is travelling faster. Therefore, her running speed increases.
Third:
Bianca's line hits 50km before Alberto, so therefore she finished first.
Let me know if this makes sense, hope it helped! :D
15. 6 - -3 = 6 + 3 = 9. Answer: 9 degrees C
16. 7 - -7 = 7 + 7 = 14. Answer: 14 degrees F
17. -1 - -5 = -1 + 5 = 4. Answer: 4 degrees C
18. 5 - -2 = 5 + 2 = 7. Answer: 7 degrees C
19. 130 - -110 = 130 + 110 = 240. Answer: 240 degrees C
