Answer:
B
Step-by-step explanation:
x + 3y = 7 → (1)
3x + 2y = 0 → (2)
Multiplying (1) by - 3 and adding to (2) will eliminate x
- 3x - 9y = - 21 → (3)
Add (2) and (3) term by term to eliminate x
0 - 7y = - 21
- 7y = - 21 ( divide both sides by - 7 )
y = 3
Substitute y = 3 into either of the 2 equations and solve for x
Substituting into (1)
x + 3(3) = 7
x + 9 = 7 ( subtract 9 from both sides )
x = - 2
solution is (- 2, 3 ) → B
1.50 pounds.
(dont have pound symbol, only $)
Answer:
64ft
Step-by-step explanation:
d = distance from the Earth/ft
t = time falling/s
d ∝ t²
d = kt²
<u>d = 16 and t = 4:</u>
16 = k(4)²
16 = 16k
k = ¹⁶/₁₆
k = 1
d = t²
<u>t = 8:</u>
d = (8)²
d = 64
Answer:
1, 3, 2, 4, 5
Step-by-step explanation:
