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4 years ago

I need help on 7 and 8 please

Mathematics

1 answer:

Aleksandr [31]4 years ago

3 0

Answer for both;
7) =-1
8) = 7

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Divide 25kg in a ratio of 2:3:5

balandron [24]

2 + 3 + 5 = 10

25 ÷ 10 = 2.5

2.5 × 2 = 5
2.5 × 3 = 7.5
2.5 × 5 = 12.5

5 : 7.5 : 12.5

8 0

3 years ago

Let B1W2 denote the outcome that the first ball drawn is B1 and the second ball drawn is W2. Because the first ball is replaced

Sati [7]

Answer:

$\{B_1B_1, B_1B_2, B_1W_1, B_1W_2, B_1W_3, \\B_2B_1, B_2B_2, B_2W_1, B_2W_2, B_2W_3, \\$

$W_1B_1,W_1B_2, W_1W_1, W_1W_2, W_1W_3, \\W_2B_1, W_2B_2, W_2W_1,W_2W_2, W_2W_3, \\W_3B_1, W_3B_2, W_3W_1, W_3W_2, W_3W_3\}$

Step-by-step explanation:

$\text{If an urn contains two blue balls} (denoted \:B_1 \:and \:B_2) \text{and three white balls}$ , $(denoted \:W_1, W_2, \:and\: W_3)$

If One ball is drawn, its color is recorded, and it is replaced in the urn. Then another ball is drawn and its color is recorded.

The 25 Possible outcomes of this experiment are listed below:

$\{B_1B_1, B_1B_2, B_1W_1, B_1W_2, B_1W_3, \\B_2B_1, B_2B_2, B_2W_1, B_2W_2, B_2W_3, \\$

$W_1B_1,W_1B_2, W_1W_1, W_1W_2, W_1W_3, \\W_2B_1, W_2B_2, W_2W_1,W_2W_2, W_2W_3, \\W_3B_1, W_3B_2, W_3W_1, W_3W_2, W_3W_3\}$

The tree diagram of this event is also attached.

6 0

4 years ago

Navigators locate an object by measuring its location clockwise direction from due north. The measure of the angle is called the

kotegsom [21]

Answer:

<em>Refer to attached.</em>

Part 1

Since bearing is taken from north, i.e. 90°, this will be represented by -45° on the units circle.

Part 2

The ordered pair is: (0.707, -0.707)

Part 3

sin (-45°) = -√2/2
cos (-45°) = √2/2
tan (-45°) = -1

5 0

3 years ago

The figure below is a net for a rectangular prism. Side a = 79 centimeters, side b = 22 centimeters, and side c = 28 centimeters

lesya692 [45]

Answer:

48664

Step-by-step explanation:

79*22*28

6 0

4 years ago

Calculate the pay for the following day of a weekly time card given a wage of $14.50/hr. Name Week of: SI Morning lo Out Monday

Vanyuwa [196]

As we can see in the card, on Monday the worker clocked in at 08:15 and clocked out at 12:15. This means they worked 4 hours.

They then clocked in at 13:00 and clocked out at 17:30. This means they worked for 4 and a half hours.

Since they earn a wage of $14.50/h, they earned:

$(4+4.5)\cdot14.50=8.5\cdot14.50=123.25.$

So that day they earned $123.25

7 0

1 year ago