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Sliva [168]
3 years ago
13

9. A car has an average speed of 80 km/h for one hour, then an

Mathematics
1 answer:
dsp733 years ago
7 0

Answer:

86.67 km/hr

Step-by-step explanation:

First Hour:  (80 km/hr)(1 hr)             =  80 km

Next two hours:  (90 km/hr)(2 hr)   =  180 km

Total distance traveled:                   = 260 km

Average speed:  total distance / total time elapsed) = 260 km  /  3 hr

= 86.67 km/hr

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lee is planning an event for 28 people, he wants to make a fruit drink and he thinks that each person will drink 3 glasses each.
GenaCL600 [577]

Answer:

84

Step-by-step explanation:

Since there will be 28 people, and each of them will drink 3 glasses, you just multiply the number of people times the number of glasses they will drink each, so 28*3. The result is 84.

I hope this helped! :D

7 0
3 years ago
Find the distance between the points (-3,2) and (0,3).
Alex777 [14]

Answer:

The distance between (-3, 2) and (0,3) is √10.

Step-by-step explanation:

As we go from (-3,2)  to  (0,3), x increases by 3 and y increases by 1.

Think of a triangle with base 3 and height 1.  Use the Pythagorean Theorem to find the length of the hypotenuse, which represents the distance between the points (-3, 2) and (0, 3):

distance = √(3² + 1²) = √10

The distance between (-3, 2) and (0,3) is √10.

7 0
3 years ago
Read 2 more answers
NEEDs HELP<br><br> AB ⊥ AC<br><br> true or false<br> idk i think it's false
jonny [76]
Perpendicular means the slopes are opposite inverse of each other
If line a is slope 2, the perpendicular line to Line a would have a slope - 1/2
Difference in y over difference in x gives slope. If they are opposite inverse values the lines are perpendicular. ( in this case the answer is true.)
4 0
3 years ago
Find the derivative dy, dx for y equals the quotient of the quantity x cubed minus 5 times x and the quantity x squared minus 1.
Elza [17]
Using the quotient rule  

dy/dx  =  (x^-1) * (3x^2 -5 ) - (x^3 - 5x) * 2x
              ----------------------------------------------
                              (x^2 - 1)^2

You are correct
7 0
3 years ago
Solve for x. x2 + x - 6 = 0 A. -2, -3 B. -2, 3 C. 2, -3 D. 2, 3
stiv31 [10]

Factor x^2 + x - 6

(x - 2)(x + 3) = 0

Solve for x

Ask yourself; When will (x - 2)(x + 3) equal zero?

When x - 2 = 0 or x + 3 = 0

Then solve for each of the two equations above

<em>x = 2, -3</em>

<u>Answer: C. 2, -3</u>

5 0
3 years ago
Read 2 more answers
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