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3 years ago

What are the square roots of the equation x^2 + 6x - 9 = 0? PLEASE HELP!!!

1 answer:

3 0

X^2+ 6x - 9 = 0

Use the quadratic formula
x = (−b± sqrt (b^2−4ac)) / 2a

a = 1
b = 6
c = -9

x = −6± sqrt (6^2−4(1)(-9) / 2(1)
x = (−6± sqrt(72))/2

so these are your two solutions to the equation
x = 1.243
x = -7.243

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How do I round up one number ow do I round up one numder

Alisiya [41]

Answer:How do I round up one number how do I round up one number you word where not spell properly for the question

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The result is less accurate, but easier to use.

round 73 is 70, 76 is 80

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Common Method

3 0

3 years ago

9 Apply index law three to simplify each of the following. a (m2) b 6(p^)

lisabon 2012 [21]

Answer:

See the law and the hypothetical example below.

Explanation:

The index law that you are dealing with is:

$\dfrac{a^m}{a^n}=a^{m-n}$

It is used when you have the quotient of powers with the same base.

To show you how to use that rule, let's work an example

Simplify:

$\dfrac{9a(m^2)}{6b(m^4)}$

Factor 9 as 3² and 6 as 2×3:

$\dfrac{3^2a(m^2)}{2\times 3b(m^4)}$

Group the factor with equal base:

$\dfrac{a}{2b}\times \dfrac{3^2}{3}\times \dfrac{m^2}{m^4}$

Use the index law:

$\dfrac{a}{2b}\times {3^{(2-1)}}\times m^{(2-4)}\\\\\\ \dfrac{a}{2b}\times3\times m^{-2}\\\\\\\dfrac{3a}{2bm^2}$

Note that it was used an additional rule: $a^{-n}=\dfrac{1}{a^n}$

Thus, $m^{-2}=\dfrac{1}{m^2}$

6 0

2 years ago

The amount of water in a bathtub as it drains can be modeled by this equation with y representing the number of gallons of water

zvonat [6]

Given function:
y=-7.3x+39.7
Where y= number of gallons of water
and x= number of minutes
Put value of y=17.8 gallons and solving for x.
17.8=-7.3x+39.7
Subtract 39.7 from both sides
-21.9=-7.3x
Divide both sides by -7.3
3=x
or
x=3 minutes
After 3 minutes the water in the tub will be 17.8 gallons.

Answer: 3 minutes

4 0

3 years ago

Read 2 more answers

1. Consider the chance experiment of selecting an adult at random from the sample. The number of credit cards is a discrete rand

Fantom [35]

Answer:

See the explanation below.

Step-by-step explanation:

Assuming the distribution table given:

X ( Number od Credit Cards) Relative frequency

0 0.26

1 0.17

2 0.12

3 0.10

4 0.09

5 0.06

6 0.05

7 0.05

8 0.04

9 0.03

10 0.03

We can create the histogram for this data using the following code in R:

> x<-c(0,1,2,3,4,5,6,7,8,9,10)

> freq<-c(0.26,0.17,0.12,0.10,0.09,0.06,0.05,0.05,0.04,0.03,0.03)

> x1<-c(rep(0,26),rep(1,17), rep(2,12),rep(3,10), rep(4,9),rep(5,6),rep(6,5),rep(7,5),rep(8,4),rep(9,3),rep(10,3))

> hist(x1,breaks = x,main = "Histogram", ylab = "%", xlab = "Number of credit cards")

And we got as the result the figure attached. We see a right skewed distribution with majority of the values between 0 and 3

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3 years ago

I’m having trouble with this problem can someone help me

anzhelika [568]

Answer: y=2x+5

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3 years ago