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3 years ago

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Question 1 (1 point)

1 answer:

Fittoniya [83]3 years ago

5 0

Answer:4T

Step-by-step explanation:

T

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11 POINTS PLZ HELP EMERGENCY

Bad White [126]

Part A

The given expression is:

$(-5(1+2i)+3i(3-4i)$

We expand to get:

$-5-10i+9i-12i^2$

Note that $i^2=-1$

$12-5-10i+9i$

$-5-10i+9i+12$

$7-i$

Part Bi)

The given expression is;

$\sqrt{-50}$

We simplify to get:

$\sqrt{25\times 2\times -1}$

$\sqrt{25\times} \sqr{2}\times \sqrt{-1}$

Note that:

$\sqrt{-1}=i$

$5\sqr{2}i$

This is now of the form $a+bi$ , where $a=0,b=5\sqr{2}$ .

This explains why it is a complex number;

Part bii)

The given expression is :

$\frac{\sqrt{-50} }{\sqrt{5}}$

We simplify to get

$\sqrt{\frac{-50 }{5}}$

$\sqrt{-25}$

$\sqrt{-25}=\sqrt{25}\times \sqrt{-1}$

$\sqrt{-25}=5\times i$

$\sqrt{-25}=5i$

Part C

We want to simplify:

$i^{22}$

We rewrite in terms of $i^2$

$i^{22}=(i^2)^{11}$

$i^{22}=(-1)^{11}$

$i^{22}=-11$

5 0

3 years ago

A coin is tossed and a spinner numbered 1 to 7 is spun. What is the probability of getting an odd number and heads

Vikki [24]

Your answer is 4/14 or 2/7. There are two possibilities when you flip a coin, heads or tails. Then for the spinner there are 7. Multiply them by each other to get the total number of outcomes of the situation of 14. Then there are only 4 odd numbers from 1-7. This means that you would only be able to get an odd number and heads 4 times.

Hope this helped!

5 0

3 years ago

Read 2 more answers

Make a two-column proof showing statements and reasons to prove that triangle DEF is similar to triangle DGE. (10 points)

spayn [35]

I dont understand that I can’t see the picture that good

4 0

3 years ago

A rock is dropped from the top floor of a tall building. Its height above the ground (in meters) is given by the formula h(t) =

mina [271]

Answer:

457543

Step-by-step explanation:

5 0

3 years ago

Use a verbal statement to describe the solution graphed below.

lana [24]

All real numbers less than 20 has been represented by the graph.

Option B is correct.

Step-by-step explanation:

The graph shown on the number line has unfilled circle on 20 and moves towards the left side of number line.

The unfilled circle shows that 20 is not included

While the graph moving towards left indicates that the numbers are decreasing and are less than 20

So, All real numbers less than 20 has been represented by the graph.

Option B is correct.

Keywords: Solving inequalities

Learn more about Solving inequalities at:

#learnwithBrainly

8 0

3 years ago