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3 years ago

Need help please explain !’ The answer

Mathematics

1 answer:

mezya [45]3 years ago

7 0

Add all the numbers up then divide that by 20 that’s your answer. I will not give you the answer because you also need to learn sorry :)

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2. What is the quotient of -18 divided by (- 1/6)? A -108 С 3 B -3 D 108

vivado [14]

Positive 3 is the answer

6 0

3 years ago

Write the following quotient in the form a+bi. -7i/2-7i

Helga [31]

Answer:

$\large\boxed{\dfrac{49}{53}-\dfrac{14}{53}i}$

Step-by-step explanation:

$\text{Use}\\\\i=\sqrt{-1}\to i^2=-1\\\\(a-b)(a+b)=a^2-b^2\to(a-bi)(a+bi)=a^2+b^2\\\\\text{distributive property}\ a(b+c)=ab+ac\\---------------------\\\\\dfrac{-7i}{2-7i}=\dfrac{-7i}{2-7i}\cdot\dfrac{2+7i}{2+7i}=\dfrac{-7i(2+7i)}{2^2+7^2}=\dfrac{(-7i)(2)+(-7i)(7i)}{4+49}\\\\=\dfrac{-14i-49i^2}{53}=\dfrac{-14i-49(-1)}{53}=\dfrac{-14i+49}{53}\\\\=\dfrac{49}{53}-\dfrac{14}{53}i$

8 0

3 years ago

Read 2 more answers

Which inequality statement describes the two numbers on a number line? "−5 and a number 4 units to the right of −5" A) 4 < −5

Marina CMI [18]

Answer: D

Step-by-step explanation:be cause you have to add 4 to negetive 5 and and that negetive 1 which is greater than -5

8 0

3 years ago

To estimate the difference we need four averages for the categorized groups i.e., control group before change, control group aft

nataly862011 [7]

Answer:

b. False

Step-by-step explanation:

In a research study, when a researcher wants to find the impact of a new treatment, then the researcher randomly divides the the study participants into two groups. The groups are :

-- control group

-- treatment group

The control group is a group that is used to establish the cause-and-effect relationship by making the effect of an independent variable isolate. It receives no treatment or some standard treatment for the which the effect is already known.

The treatment group receives the treatment for which the effect the researcher is interested in.

Thus the averages of the four categorized groups are not required for estimating the difference.

Therefore, the answer is FALSE.

3 0

2 years ago

Rewrite it in factored form: x4 - y2 x2

SCORPION-xisa [38]

Answer:

$(x^2+xy)(x^2-xy)$

Step-by-step explanation:

I'm going to write it so I can see it better:

$x^4-y^2x^2$

You can use the difference of squares formula:

$(x^2+xy)(x^2-xy)$

3 0

3 years ago