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zmey [24]
3 years ago
14

Carol drove 720 km in 9 hours. What was her rate in km/hr? Please help

Mathematics
1 answer:
Nastasia [14]3 years ago
4 0

Answer:

80 km/hr

Step-by-step explanation:

This is asking for speed.

Speed=Distance/Time

Speed=720/9

Speed=80 km/hr

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Find cot theta if 180° < theta < 270° and cos theta = - sqrt 3/2
avanturin [10]

Answer:

cot theta = -√3

Step-by-step explanation:

we are given that  cos theta = - √3/2 within the range 180° < theta < 270° and

since cos theta = adj/hyp

adj = - √3

hyp = 2

Get the opposite using the pythagoras theorem

hyp^2 = opp^2 + adj^2

2² = opp² + (-√3)²

4 = opp² + 3

opp² = 4-3

opp² = 1

opp = 1

tan theta = opp/adj

tan theta = - 1/√3

Recall that cot theta = 1/tan theta

cot theta = 1/(-1/√3)

cot theta = -√3

8 0
3 years ago
The price of a certain painting increased by 20% during the first year and decreased by 15% during the second year. The price of
Rina8888 [55]

Answer:

A.102%

Step-by-step explanation:

Let cost price of painting=$100

In first year price increased 20%

Then , the price=100+100(0.20)=$120

In second year

Price decreased 15%

Then , the price of painting=120-120(0.15)

The price of painting=$102

Percent =\frac{final\;price}{Initial\;price}\times 100

By using this formula

Then, we get

Percent of the original price=\frac{102}{100}\times 100

Percent of the original price=102%

Option A is true.

8 0
3 years ago
After dinner, Mirna had a second serving of her chocolate bar, eating 3
trapecia [35]

The answer is c because 8 - 5 is 3.

3 0
3 years ago
What number on the number line represents ground level?<br>0<br>-1<br>-2<br>-3<br>-4<br>-5<br>-6​
ki77a [65]

Answer:

0 represents ground level.

Step-by-step explanation:

0 on the number line represents ground level. Based on the photo, the 0 is in between the underground and the space above. The answer cannot be one of the negative numbers because those are all shown to be underground in the photo.

5 0
3 years ago
6K x 1/6<br><br> K is just k
NISA [10]

6k · 1/6 = 6/6k = k

.......

5 0
3 years ago
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