Answer:
Gave’s speed: 70 mph
Elsa’s speed 77 mph
Step-by-step explanation:
d = rt (distance = rate(speed) * time)
Gave d = 2.2r
Elsa d = (r+7)2
Distance was the same for both.
2.2r = 2r + 14
2.2 - 2r = 14
0.2r = 14
r = 14/0.2
r = 70
Answer:
Answer (C) ⇒ He replaced the wrong term with its reciprocal in step 2
Answer (A) ⇒ How many 3/8 's in 48
Step-by-step explanation:
∵ The distance = 25 miles
∵ The time = 2/3 hour
∵ Average speed = distance ÷ time
∴ Average speed = 25 ÷ 2/3 ⇒ step 1 (he is √)
= 25 × 3/2 ⇒ step 2 (his 1st error 1/25 × 2/3)
= 75/2 miles/h
∵ How many 3/8 's are in 48 means:
48 ÷ 3/8 = 48 × 8/3 = 128
∴ Answer (A) is best modeled with a division expression
A
C
D
E
F
B should be the obvious no-no
Either factor in paren can be equal 0
so either q=-2
or q=-3/4
Answer:
B
Step-by-step explanation:
Cos(0)=1
since the diagram shows x as (1,0)
