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3 years ago

Make sure to pick ALL and It needs To BE CoRRECt

Mathematics

1 answer:

umka2103 [35]3 years ago

4 0

Answer:

(a): 9x + 45

Option A, 9(x + 5) because it distributes into 9x + 45

Option B, 9 * x + 9 * 5 because it multiplies into 9x + 45

(b): 13 + 9y - 3 - y

Option D, 8y + 10 because it combines into this number

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the following numarically ordered sequence has a mean of 17 and a median of 18 given the data values 7,a,12,15,17,b,20,22,24,25

olga_2 [115]

Answer:

a=9 b=18

Step by-step explanation:

First we will find b.

Because there is no 18 in this set and it's an even set of numbers, this would mean that 18 is not present in the set.

The only way for 18 to the be the mean is for b to equal 19. When calculating the average of 17 and 19 your average, or mean, is 18.

a has to be a number ranging from 7-12.

Through trial and error, it can be found that the missing value of a is 9.

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3 years ago

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ICE Princess25 [194]

Answer:

5/2 or c

Step-by-step explanation:is correct trust me

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4 years ago

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Umnica [9.8K]

Answer: 17x+9

Step-by-step explanation:

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3 years ago

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I need all of these please help someone

Fudgin [204]

Ok so i only did 9-18
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3 years ago

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40x=10x^2+41 Identify the number of solutions and their types using the discriminant

nydimaria [60]

Number of solutions: no roots

Type of solution: Not Real

Step-by-step explanation:

We need to identify the number of solutions and their types using the discriminant.

We are given: $40x=10x^2+41\\$

Rearranging:

$40x-10x^2-41=0\\10x^2-40x+41=0$

Discriminant can be found by: $b^2-4ac$

where b=-40, a=10 and c=41

Putting values:

$b^2-4ac\\=(-40)^2-4(10)(41)\\=1600-1640\\=-40\\$

So, Discriminant is -40

If the discriminant is less than zero i.e -40 then there are no real roots.

So, Number of solutions: no roots

Type of solution: Not Real

Keywords: discriminant

Learn more about discriminant at:

#learnwithBrainly

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3 years ago