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makvit [3.9K]
3 years ago
13

Opening Exercise

Mathematics
1 answer:
SOVA2 [1]3 years ago
4 0

Answer:

Jayla: 100th number is 200

Yaseen: 100th number is 8

Elijah: 100th number is 0

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Name the marked angle in 2 different ways.
Ganezh [65]

Answer:

Right angle, and angle IJK

Step-by-step explanation:

4 0
2 years ago
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Matthew has a 150 page book he has read one third of it how many pages has he read so far
posledela
You take 150/3. The answer is 50.
8 0
3 years ago
QUICK HELP!!!!!!!!!!!!
Trava [24]

Answer:

50%

Step-by-step explanation:

8+3+4=15

15/3=5

5x10=50

3 0
3 years ago
1. (a). A police car, approaching right-angled intersection from the north, is chasing a speedmg
tamaranim1 [39]

Answer:

<em>The SUV is running at 70 km/h</em>

Step-by-step explanation:

<u>Speed As Rate Of Change </u>

The speed can be understood as the rate of change of the distance in time. When the distance increases with time, the speed is positive and vice-versa. The instantaneous rate of change of the distance allows us to find the speed as a function of time.

This is the situation. A police car is 0.6 Km above the intersection and is approaching it at 60 km/h. Since the distance is decreasing, this speed is negative. On the other side, the SUV is 0.8 km east of intersection running from the police. The distance is increasing, so the speed should be positive. The distance traveled by the police car (y) and the distance traveled by the SUV (x) form a right triangle whose hypotenuse is the distance between them (d). We have:

d=\sqrt{x^2+y^2}

To find the instant speeds, we need to compute the derivative of d respect to the time (t). Since d,x, and y depend on time, we apply the chain rule as follows:

\displaystyle d\ '=\frac{x.x'+y.y'}{\sqrt{x^2+y^2}}

Where x' is the speed of the SUV and y' is the speed of the police car (y'=-60 km/h)

We'll compute  :

d=\sqrt{(0.8)^2+(0.6)^2}=\sqrt{0.64+0.36}

d=1\ km

We know d'=20 km/h, so we can solve for x' and find the speed of the SUV

\displaystyle \frac{x.x'+y.y'}{\sqrt{x^2+y^2}}=20

Thus we have

x.x'+y.y'=20

Solving for x'

\displaystyle x'=\frac{20-y.y'}{x}

Since y'=-60

\displaystyle x'=\frac{20+0.6(60)}{0.8}

x'=70\ km/h

The SUV is running at 70 km/h

7 0
3 years ago
What is 5 days 6 hours 20 minutes minus 3 days 8 hours 40 minutes
Svet_ta [14]
1 day    21 hours    40 minutes   is your answer
8 0
3 years ago
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