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babymother [125]
3 years ago
6

A long distance runner starts a race at 1 m/s. he increases his speed to 3 m/s during the middle of the race and slows down to 2

m/s at the end. in total he runs 2,000 meters in 12 minutes (720 seconds). what is his average speed?
Mathematics
1 answer:
slavikrds [6]3 years ago
6 0
The answer is 2000:720~2.778 m/s
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-9/2+ 1/2 + 13/2 = -1/2 (8+13)
AysviL [449]

Answer:

−9

2

+

1

2

+

13

2

?

=

−1

2

(8+13)

2.5≠−10.5

False

Step-by-step explanation:

5 0
3 years ago
During a weekend the manager of a mall gave away gift cards to every 80th person who visited the mall. On saturday 12010 on sund
inysia [295]

Answer:

172.8 people got a gift card

Step-by-step explanation:

12,010 + 1,814 = 13,824 divided 80

= 172.8 people got a gift card

6 0
3 years ago
A farm had 480 acres more wheat than corn. After the farmers collected 80% of the wheat and 25% of the corn, the area of the whe
SVEN [57.7K]
A farm had 480 acres more wheat than corn. Let use "W" to represent the Wheat and let use "C" to represent the corn. Hence, we have below:
W=C+480

The farmers collected 80% of the wheat and 25% of the corn and the area of the wheat is 300 acres less than the area of the corn:
W-0.8W=C-0.25C+300
0.2W=0.75C+300
We have two equations, two unknowns:
0.2(C+480)=0.75C+300
0.2C+96=0.75C+300
0.55C=294
C=534.55
6 0
3 years ago
Read 2 more answers
Mr Reid needs 5 1/2 yards of fabric to make a costume. He already has 2 1/4 yards. How many yards of fabric does he need?
KiRa [710]
He needs 3 1/4 more yards of fabric because 5.5 - 2.25 = 3.25
8 0
3 years ago
N × 9 = 0 true? please i will give 25 points?
-BARSIC- [3]

Answer:

This can be true if n=0

Step-by-step explanation:

9n = 0

Divide each side by 9

9n/9 = 0/9

n=0

This can be true if n=0

5 0
3 years ago
Read 2 more answers
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