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Licemer1 [7]
3 years ago
14

3(5a-b) - 2(3a-b) answer step by step​

Mathematics
1 answer:
tiny-mole [99]3 years ago
4 0

Answer:

9a-b

Step-by-step explanation:

1) 3 (5a - b) - 2 (3a - b)

15a - 3b - 2 (3a - b)

2) 15a - 3b - 2 (3a - b)

15a - 3b - 6a + 2b

3) 15a - 3b - 6a + 2b

9a - 3b + 2b

4) 9a + 3b + 2b

9a - b

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Find the surface area of the cone that has a lateral height of 4.2 and a diameter of 2.8. Use 3.14 for π.
Anvisha [2.4K]

Answer:

here look for it there is a sol

Step-by-step explanation:

https://www.careerlauncher.com/cbse-ncert/class-9/Math/CBSE-SurfaceAreasandVolumes-NCERTSolutions.html

5 0
2 years ago
Help plzzzzzzz......​
Veronika [31]

Answer:

A. England = 56000000

B. 1.046 * 10^7

C. 9.7 to 2sf

Step-by-step explanation:

A. England = 5.60*10000000

=56000000

B. Wale = 3.14*1000000 = 3140000

Scotland = 5.44*1000000 = 5440000

Northern Ireland = 1.88*1000000 =1880000

Total = 10460000

In standard form =1.046*10^7

C. Total population as at 2018 = 66460000

expected population by 2041 = 72900000

increase or change = (72900000 - 66460000) = 6440000

% change = (6440000/66460000)*100

= 0.0969003912 * 100

= 9.69003912

= 9.7 to 2sf

8 0
3 years ago
Experiments on learning in animals sometimes measure how long it takes mice to find their way through a maze. The mean time is 1
Dahasolnce [82]

Answer:

<h3>Option c) H_a:\mu is correct</h3><h3>The alternate hypothesis for the significance test is H_a:\mu</h3>

Step-by-step explanation:

The alternate hypothesis use the sumbol for the population value

Let p be the proportion , Mean be \mu and stadard deviation be \sigma

The null hypothesis states that population value is equal to the value mentioned in the given claim.

H_0:\mu=18 (by given).

The alternate hypothesis for the significance test states that the opposite of the null hypothesis(based on the claim )

∴ H_a:\mu

The symbol "<" because we want to test if the maze is completed faster and thus if the time has decreased.

<h3>∴ option c) H_a:\mu is correct.</h3>
3 0
2 years ago
Solve for all values of x by factoring. x^2-5x=-2x
-Dominant- [34]

Answer:

x = 0

x = 3

Step-by-step explanation:

x^2 - 5x = -2x\\x^2 - 5x + 2x = 0\\x^2 - 3x = 0\\x(x - 3) = 0\\x=0 , x-3=0\\x=0, x=3

4 0
3 years ago
Miss Rodriguez uses 24% for net income to pay her monthly rent of $1635 what is her monthly net and come to the nearest whole ce
Gemiola [76]

( 1635 ÷ 24 ) • 100 = monthly income

1635 ÷ 24 = 68.125

68.125 • 100 = $6812.50 a month

7 0
2 years ago
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