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stira [4]
3 years ago
6

Guys what is the answer

Mathematics
1 answer:
timama [110]3 years ago
5 0

150°

Step-by-step explanation:

360° - 210° = 150° .......

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Find an expression for the area of this shape ( plz show working out)
ankoles [38]

Answer:

this is your answer. thanks!!

8 0
3 years ago
Roberto rowed 20 miles downstream in 2.5 hours. The trip back, however, took him 5 hours. Find the rate that Roberto rows in sti
almond37 [142]

Answer:

<em>Roberto's speed in still water is 6 miles/hour and the river speed is 2 miles/hour</em>

Step-by-step explanation:

<u>Relative Speed</u>

When a body is moving at a constant speed v, the distance traveled in a time t is:

d=v.t

When Roberto rows downstream, his speed in still water is added to the speed of the water, making it easier to travel the required distance.

When Roberto rows upstream, his speed in still water is affected by the speed of the water, both are subtracted and the required distance is covered in more time.

Let's call

x = Roberto's rowing speed in still water

y = Speed of the river current

The speed when rowing downstream is x+y, thus the distance traveled is

d=(x+y).t_1

Where t1=2.5 hours. Substituting values:

20=(x+y)*2.5

Rearranging, we find the downstream equation:

2.5x+2.5y=20\qquad[1]

The speed when rowing upstream is x-y, and the distance traveled is

d=(x-y).t_2

Where t2=5 hours. Substituting values:

20=(x-y)*5

Rearranging, we find the upstream equation:

5x-5y=20\qquad[2]

Multiplying [1] by 2:

5x+5y=40

Adding this equation to [2]:

10x=60

Solving:

x=60/10=6

Dividing [2] by 5:

x-y=4

Solving for y

y=x-4=6-4=2

Thus, Roberto's speed in still water is 6 miles/hour and the river speed is 2 miles/hour

3 0
3 years ago
What’s the answer for 12?
Lisa [10]

Answer:

- 3 \sqrt{4 \times 4 \times 3}  \\  - 3 \times 2 \times 2 \sqrt{3 }  \\  - 12 \sqrt{3}

6 0
3 years ago
Select the values of xxx that make the inequality true. x&gt;\dfrac 12x&gt; 2 1 ​ x, is greater than, start fraction, 1, divided
masha68 [24]

Answer:

A. 2⅓ and D.1

Step-by-step explanation:

We are required to select the values of x that makes the inequality x>½ true.

A. 2⅓

B. 0

C.-1½

D. 1

E.-¾

Options C and E are negative numbers and are therefore less than the positive number ½.

Option B(i.e. 0) is also less than ½ or 0.5 and therefore do not satisfy the inequality given.

Options A and D are greater than ½ and therefore satisfies the inequality given.

4 0
3 years ago
Using the graph below, select all statements that are true.
Harrizon [31]

Answer:

b and E and c

Step-by-step explanation:

  • A is false because some elements have the same image like 2.3 and 2.2 , 2.5 ...
  • B is true because the image of an integer remains the same using the greatest integer function. So C is true
  • E is true

6 0
3 years ago
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