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4 years ago

What is the angle of rotation of the minute hand of a clock moving from 6:10 to 7:00?

2 answers:

5 0

Because the movement of the minute han of a clock is clockwise ↓, then the angle of rotation will be negative.

1) we calculate the number of minutes from 6:10 to 7:00

number of minutes=7:00-6:10=6:60 - 6:10=50 minutes.

2)
We know that:
60 minutes of a clock have turned -360º
Then:

60 minutes of a clock------------------------- -360º
50 minutes of a clock------------------------- x

x=(50 minutes of a clock * (-360º))/60 minutes of a clock=-300º

Answer: A. -300º

Y_Kistochka [10]4 years ago

4 0

Answer:

The right answer is A) -300.

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How do I solve for a, b and c?

Naya [18.7K]

Firstly expand (x - 3)(ax^2 + bx + c):
ax^3 + bx^2 + cx - 3ax^2 - 3bx - 3c

Now rearrange it so that it's in the form ax^3 + bx^2 + cx + d:
ax^3 + (b-3a)x^2 + (c-3b)x - 3c

Now we can compare both equations:
ax^3 + (b-3a)x^2 + (c-3b)x - 3c = 2x^3 - x^2 - 19x + 12

We get:
(1) a = 2
(2) b - 3a = -1
(3) c - 3b = -19
(4) -3c = 12

If we substitute (1) into (2) we get:
b - 3*2 = -1
b - 6 = -1
b = 5

Now if we solve (4) we get:
-3c = 12
c = -4

Therefor a = 2, b = 5 and c = -4

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3 years ago

An auditorium has 40 rows of seats. There are 20 seats in the first row. Each row has 2 more seats than the row before. How many

Bezzdna [24]

Answer:

1600

Step-by-step explanation:

(40*2)20=

7 0

3 years ago

Read 2 more answers

In a box there are six envelopes each containing two cards. Three of the envelopes contain two red cards, two of them contain a

Sphinxa [80]

Answer:

$\frac{2}{5}$

Step-by-step explanation:

3 envelopes having 2 red card

2 envelopes having 1 red card and 1 black card

1 envelope having 2 black cards

We are given that . An envelope is selected at random and a card is withdrawn and found to be red.

So, No. of ways of envelope having red card = 3+2 = 5

No. of required ways of envelope having 1 red card and 1 black card = 2

So, probability of getting an envelope having 1 red card and 1 black card = $\frac{2}{5}$

Hence The chance the other card is black is $\frac{2}{5}$

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3 years ago

Write the equation of a line<br>parallel to y = 4x + 3 that goes<br>through (2,-5).

WINSTONCH [101]

Answer:

y = 4x -13

Step-by-step explanation:

parallel lines have the same slope.

y = mx + b

-5 = 2(4) +b

-5 = 8 + b

b = -13

y = 4x -13

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4 years ago

The greatest monthly snowfall total in Alaska is 297.9 inches. This happened in February, 1953. Compare the daily average snowfa

kolbaska11 [484]

What is the daily snowfall

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3 years ago