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son4ous [18]
2 years ago
6

Is the following shape a rectangle? how do you know?

Mathematics
1 answer:
Usimov [2.4K]2 years ago
8 0
Slope of AB =  1/3 and slope of  BC = -3    so these 2 lines are perpendicular
The same is true for all the other adjjacent pairs of lines.
Oppoitse lines are also paralllel (  slope of AB = 1/3 and slope of  DC = 1/3)  and other pair are both of slope -3.

So Its C
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(b) The man is going to exit the stairwell at the 4th floor, which is at a height of 42 feet above
atroni [7]

The time taken to get to the 4th can be obtained by dividing the distance given by the speed of the lift.

Distance, height from ground to 4th floor = 42 feets

Time taken to get to the 4th floor = t

Recall :

Time = Distance / speed

  • We aren't given the speed of the lift ;

  • Assume speed of lift is 7 ft/sec

The time taken to get to the 4th floor will be :

  • t  =  \frac{42}{7}  = 6 \: seconds

Therefore, to obtain the time taken, divide the distance or height of the 4th floor by the speed of the lift.

Learn more : brainly.com/question/13218948

7 0
2 years ago
Sean has $75 to spend on CDs. If each CD costs $6.98, about how many CDs can he buy?
Daniel [21]
75/6.98=10.744
We would most likely round this down to 10 even though the .7 because if we round up we would go over the budget.
So he can buy about 10 CDs
7 0
3 years ago
Read 2 more answers
I NEED HELP ON THIS ASAP PLEASEEEEE
ryzh [129]

Answer:

b

Step-by-step explanation:

8 0
2 years ago
Find the value of x. Round to the nearest tenth.please help.
Serga [27]

Answer:

39.9

Step-by-step explanation:

A good trick to remember is SOH CAH TOA.

Sine = Opposite / Hypotenuse

Cosine = Adjacent / Hypotenuse

Tangent = Opposite / Adjacent

Here, we're given an angle and the opposite side, and we want to find the adjacent side.  So we need to use tangent.

tan 31° = 24 / x

x = 24 / tan 31°

x ≈ 39.9

5 0
3 years ago
Vladimir says that the equation of the line that passes through points (negative 5, negative 3) and (10, 9) is y = four-fifths x
love history [14]

Answer:

Vladimir and Robyn both are correct.

Step-by-step explanation:

Let us check whether the points (-5,-3) and (10,9) are on the line y = \frac{4}{5}x + 1 or not.

The equation of the straight line passing through the given points (-5,-3) ans (10,9) is \frac{y - 9}{9 + 3} = \frac{x - 10}{10 + 5}

⇒ 5(y - 9) = 4(x - 10)

⇒ 5y = 4x + 5

⇒  y = \frac{4}{5}x + 1 .............. (1)

So, Vladimir is correct.

Now, Robyn says that the line passes through the points (-10,-7) and (-15,-11).

Then, both of the points satisfy the equation (1).

Therefore, Vladimir and Robyn both are correct. (Answer)

4 0
3 years ago
Read 2 more answers
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