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Andre45 [30]
3 years ago
12

Simplify: (x2 − 8x + 5) + (−3x2 + 5x − 9)

Mathematics
2 answers:
Nana76 [90]3 years ago
7 0
<span>−2x2 − 3x − 4 is your answer hope this helps</span>
Paladinen [302]3 years ago
4 0

Answer:

-2x^2-3x-4

Step-by-step explanation:

We have to simplify the expression (x^2-8x+5)+(-3x^2+5x-9)

Distribute the positive sign over the parenthesis

x^2-8x+5-3x^2+5x-9

Combine the like terms

-2x^2-3x-4

Therefore, the expression after simplification is -2x^2-3x-4

Second option is correct.

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The mean if 5 numbers is 19 what is the sum of the number?​
Dahasolnce [82]

Answer:

95

Step-by-step explanation:

Use the mean formula: mean = sum of elements / number of elements

Plug in the mean and number of elements, then solve for the sum of the numbers:

mean = sum of elements / number of elements

19 = sum of elements / 5

95 = sum of elements

So, the sum of the numbers is 95.

4 0
3 years ago
A cone-shaped paper drinking cup is to be made to hold 33 cm3 of water. find the height and radius of the cup that will use the
alekssr [168]
The height and radius that will give us the smallest amount of paper, should have should have the perfect dimension, in that the diameter should be equal to the height. thus let the diameter be x, the height will be x and the radius will be x/2
thus the volume of the cone will be:
V=1/3πr^2h
=1/3*π*(x/2)^2*x
=0.262x^3
hence the value of x will be:
33=0.262x^3
x^3=125.95
x=(125.95)^(1/3)
x=5.0126=5.01 cm
thus the diameter=height=5.01cm
6 0
4 years ago
Find the area of a rectangle whose length is 68 cm and breadth 4 m.
OLga [1]

Area= length × Breadth of rectangle

> Area = 68 × 4 m^2

> Area = 272 m^2

4 0
3 years ago
Steven's kite rose into the air at the rate of five feet per second. How many feet did it rise in 2/3 minute (please explain how
igor_vitrenko [27]

Answer:

800 ft

Step-by-step explanation:

2/3 minutes = 2/3 min * 60 sec/min = 40 sec

5 ft/sec * 40 sec = 800 ft

4 0
3 years ago
Two people taking the test are chosen at random. what is the probability that at least one of them scores more than 500 points?
Lyrx [107]
It depends what their IQ level is.
7 0
3 years ago
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