What are the answers??? Please help!!!

Mathematics

1 answer:

viktelen [127]3 years ago

3 0

Remember when you see those two signs next to each other its “kao” which is keep add opposite so for b its 6-(-3) but you do keep add opposite so now it’s 6+3=9. for c it’s -2-(-5) and we still do kao which now it’s -2+5 different signs you subtract so now it’s 3 we always keep the sign of the higher variable and 5 is positive so the answer is positive.

You might be interested in

2x + 3y = -2<br> 3x - y = -14

DochEvi [55]

Answer: The answer is x=-4 and y = 2

Step-by-step explanation: you have to use substitution

6 0

3 years ago

Factor the polynomial expression x^4+18x^2+81

Vikentia [17]

Answer:

Step-by-step explanation:

Hello,

please consider the following

$x^4+18x^2+81=(x^2)^2+2*(3^2)x^2+(3)^4\\\\=(x^2+9)^2$

hope this helps

4 0

3 years ago

Cuatro amigos, Andrés, Diego, Jairo y Luis juegan billar y acuerdan que aquel que pierda deberá duplicar la cantidad de dinero d

Cerrena [4.2K]

Answer:

creo que 150

Step-by-step explanation:

4 0

3 years ago

Figure 1 and figure 2 are show on the coordinate plane below.

Mekhanik [1.2K]

Answer:

d think

Step-by-step explanation:

I don't really know but I'm pretty sure that's it.

6 0

3 years ago

An amusement park would like to determine if they want to add in a new roller coaster. In order to decide whether or not they sh

Rzqust [24]

Using the z-distribution, it is found that the 90% confidence interval is given by: (0.6350, 0.6984).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 90% confidence level, hence $\alpha = 0.9$ , z is the value of Z that has a p-value of $\frac{1+0.9}{2} = 0.95$ , so the critical value is z = 1.645.