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4 years ago

What’s the answer of this math problem

Mathematics

2 answers:

Klio2033 [76]4 years ago

5 0

2.1a - 0.4b - 1.2 is the correct answer

finlep [7]4 years ago

3 0

Hey there :)

3.2a - 4.3b - ( 1.4a - 3.9b + 1.2 )

Let us open the brackets
3,2a - 4.3b - 1.4a - ( - 3.9b ) - 1.2
3.2a - 4.3b - 1.4a + 3.9b - 1.2

Combine like-terms
3.2a - 1.4a - 4.3b + 3.9b - 1.2
1.8a - 0.4b - 1.2

Your answer will be option A

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The area of a square tile is 50 square centimeters. To the nearest tenth of a centimeter, how long is one side of this tile?

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Answer:

7.1 cm

Step-by-step explanation:

50 squared is closest to 7, which is the square root of 49.

7 0

3 years ago

What is the equation of the line passing through the point ( 0,0), ( 2, 1), and ( -2, -1)

Lerok [7]

Answer:

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3 years ago

Help me with this question

Ivan

B is the answer because none of the others will be right and b is the one you should always do when to solve a rea word problem

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3 years ago

A radio station claims that the amount of advertising per hour of broadcast time has an average of 10 minutes and a standard dev

podryga [215]

Answer: -0.36

Step-by-step explanation:

Given: Mean : $\mu=10\text{ minutes}$

Standard deviation : $\sigma=5\text{ minutes}$

We know that the formula to calculate the z-score is given by :-

$z=\dfrac{x-\mu}{\sigma}$

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Hence, the z-score for this amount of advertising time = -0.36

4 0

3 years ago

Tapiwa takes 5% more leaves than adam raked. together they raked 697 liters of leaves

Nina [5.8K]

----------------------------------
Define their percentage:
----------------------------------
Adam = 100%
Tapiwa = 100 + 5 = 105%

----------------------------------
Find their total percentage:
----------------------------------
100 + 105 = 205

----------------------------------
Find 1%
----------------------------------
205% = 697 liters
1% = 3.4 liters

----------------------------------
Find 100% (Adam):
----------------------------------
100% = 3.4 x 100
100% = 340 liters

----------------------------------
Find 105% (Tapiwa):
----------------------------------
105% = 3.4 x 105
105% = 357 liters

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Answer: Tapiwa = 357 liters and Adam = 340 liters.
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8 0

3 years ago