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3 years ago

Hibdgfhvfbddo you have to multiply 10 220

Mathematics

2 answers:

loris [4]3 years ago

8 0

10•220=2200 answer bc u add a zero

mezya [45]3 years ago

6 0

10*220 is 2200 because u just add 1 zero to the final answer because 10 only has 1 zero

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Сатре о

allsm [11]

Answer:

$mnb^2 = ac(m+n)^2$

Step-by-step explanation:

Given

$ax^2 +bx + c = 0$

Required

Condition that the roots is in m : n

Let the roots of the equation be represented as: mA and nA

A quadratic equation has the form:

$x^2 + (sum\ of\ roots)x + (product\ of\ roots)=0$

$x^2 - (\frac{b}{a})x + \frac{c}{a} = 0$

We have the roots to be mA and nA.

So, the sum is represented as:

$Sum = mA + nA$

$Sum = A(m + n)$

And the product is represented as:

$Product = mA * nA$

$Product = mnA^2$

By comparing:

$x^2 + (sum\ of\ roots)x + (product\ of\ roots)=0$

with

$x^2 - (\frac{b}{a})x + \frac{c}{a} = 0$

$Sum = -\frac{b}{a}$

$Product = \frac{c}{a}$

So, we have:

$Sum = -\frac{b}{a}$

$A(m + n) = -\frac{b}{a}$

Make A the subject:

$A = \frac{-b}{a(m+n)}$

$Product = \frac{c}{a}$

$mnA^2 = \frac{c}{a}$

Substitute $A = \frac{-b}{a(m+n)}$

$mn(\frac{-b}{a(m+n)})^2 = \frac{c}{a}$

$mn\frac{b^2}{a^2(m+n)^2} = \frac{c}{a}$

Multiply both sides by a

$a * mn\frac{b^2}{a^2(m+n)^2} = \frac{c}{a} * a$

$\frac{mnb^2}{a(m+n)^2} = c$

Cross Multiply:

$mnb^2 = ac(m+n)^2$

Hence, the condition that the ratio is in m:n is

$mnb^2 = ac(m+n)^2$

7 0

3 years ago

Suppose you have a group of 8 male and 4 female volunteers. how many ways are there to choose 6 of these volunteers for a treatm

Kay [80]

Since volunteers can be of any sexe (no precision given in your problem), then we can consider the question as how many group of 6 we can make with 12 persons:
It's a combination of 6 chosen among 12

¹²C₆ = (12!)/(6!).(12-6!)

²C₆ = (12!)/(6!).(6!)<span>

</span>¹²C<span>₆</span> = 924 Ways

6 0

3 years ago

What is the square root of -1?

Setler [38]

Sorry, there is not any square root of -1.

Thank you♥♥

3 0

2 years ago

Read 2 more answers

Suzie purchased a dress on sale for $27.20. This is 85% of the original price. What was the original price?

Sladkaya [172]

27.2/0.85= 32

The original price of the dress is $32.

Hope this helps!

3 0

3 years ago

In 2.5 hours a bike-rider travels 45 miles. What is the bike-rider’s speed?

satela [25.4K]

Answer:

18 mph

Step-by-step explanation:

45/2.5= 18

4 0

3 years ago