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Darina [25.2K]
3 years ago
6

Create a quadratic trinomial with zeros equal to 4 and 5

Mathematics
1 answer:
Ilya [14]3 years ago
5 0

Answer:

x^2 - 9x + 20

Step-by-step explanation:

(x - 4)(x - 5) (have to do the opposite for it to be positive)

FOIL method: X x X = x^2

-5 x X = -5x

-4 x X = -4x

x^2 - 5x - 4x + 20

-5 - 4 = -9 so...

x^2 - 9x +20 is the answer

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What 1 thruogh 100 added up them divided
Marina CMI [18]
We can use the sum of an aritmetic sequence
the sum from n=1 to n=r when the first term is a1 and the nth term is an is
S=\frac{n(a_1+a_n)}{2}
first term is 1
last term is 100
there are 100 terms so n=100

so the sum is S=\frac{100(1+100)}{2}
S=(50)(101)
S=5050
now you want us to divide by 10
5050/10=505


fun fact, gauss (famous math guy) did this when he was younger, legend has it that he was assigned this as an in class assigment to kill time but gauss found a neat pattern, he noticed that adding the end terms wer giving the same sum, example, 100+1=101, 2+99=101, etc, so he just needed to find al the pairs and add them all up




answer is 505
the result is 505
5 0
3 years ago
A group of 55 friends meets for lunch. They greet each other by exchanging fist bumps. How many fist bumps are exchanged if each
ANTONII [103]
55 * 54 = 2,970, hope this helps.
7 0
3 years ago
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A recipe calls for 1 part beans to 1-1/2 parts rice. If 1-1/2 parts of beans are used how much rice should be used
Maurinko [17]
I think the answer is 2 parts rice. If you added half to the beans, do it to the rice too.
5 0
3 years ago
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There are 5 million people in 410 square miles. That is the same as _______ people per square mile.
Mice21 [21]

Answer:

12,195.122

Step-by-step explanation:

there are 5 million people

there are also 410 square miles

the solution for this is 5,000,000÷ 410 which is 12,195.122 people p/sqrm

8 0
3 years ago
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The area of the trapezoid is 9 square centimeters.
Lana71 [14]

Answer:

Height : 3 cm

Step-by-step explanation:

The formula for a trapezoid is

<u> a+b</u> ×height

2

Rearrange for formula :

2 \times \frac{area}{ base + base }

2\frac{9}{ 4 + 2 }  = 3cm

7 0
2 years ago
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