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3 years ago

Factor this X^2+10+9=0

Mathematics

1 answer:

Art [367]3 years ago

8 0

To factor this quadratic equation into double brackets, you need to find two numbers that add together to equal 10, but also multiply to give you 9. These two numbers can be identified as 1 and 9, which will be the numbers you place in your parentheses as follows:
(x+1)(x+9)

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I really need help with this please ! I don't understand it, and I have a quiz tomorrow

erik [133]

You can do this by finding a number close to it, and then finding out how to do it.

For example with 63(square root sign), find out what is close to it.

7x7=49 while 8x8=64

Because of this, we now know that it is between 7 and 8 but is also really close to 8.

Our number could be 7.9

Hope this helped!!!

3 0

3 years ago

What is the surface area of the square pyramid?

yawa3891 [41]

The answer is 240 because 11 x 8 is 88 but you divide by 2 since it's a triangle so you get 44 and since there's 4 triangles you do 44 x 4 and get 176 then 8 x 8 is 64 plus 176 is 240

3 0

3 years ago

find the lower quartile for the data {47.2, 33.8, 43, 62, 5.8, 9, 61.4, 30.8, 68.2, 51.6, 13.2, 17.4, 64.2, 50.6, 29.4, 40.4}

mote1985 [20]

Answer:

The lower quartile is 23.4

Step-by-step explanation:

The given data are;

47.2, 33.8, 43, 62, 5.8, 9, 61.4, 30.8, 68.2, 51.6, 13.2, 17.4, 64.2, 50.6, 29.4, 40.4

Rearranging the data, we have;

5.8, 9, 13.2, 17.4, 29.4, 30.8, 33.8, 40.4, 43, 47.2, 50.6, 51.6, 61.4, 62, 64.2, 68.2

The lower quartile, Q₁, is the (n + 1)/4 th term which is (16 +1)/4 = 4.25th term

However since we have an even set of numbers, we place a separator at the middle and we look for the median of the left half as follows

5.8, 9, 13.2, 17.4, 29.4, 30.8, 33.8, 40.4║ 43, 47.2, 50.6, 51.6, 61.4, 62, 64.2, 68.2

We have two numbers (17.4 + 29.4) at the median of the left set of numbers, we find the average of the two numbers to get the lower quartile

The lower quartile is therefore = (17.4 + 29.4)/2 = 23.4.

3 0

4 years ago

Solve for Z. No fractions or variables in solution.

Lorico [155]

x + y - 7 = z

awesome

5 0

4 years ago

What’s the value of x and what’s the angle?

Alinara [238K]

Answer:

X=9 Angle= 55

Step-by-step explanation:

The sum of all the angles of a triangle is always 180

so we add the angles

50 + 75 + (5x + 10)=180

125 +5x+ 10=180

135 +5x = 180

5x= 45

x=9

to find the angle we substitute x for 9

5(9)+10=55

6 0

3 years ago