Can someone help please

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Explanation:

When you have a quadratic in the form ax^2 + bx + c = 0, where a,b,c are real numbers, then a negative discriminant leads to having a pair of complex roots. The roots come in conjugate pairs meaning that p+qi is one root while p-qi is the other root. The p,q are real numbers.

In the case of 4+7i being one root, we have p = 4 and q = 7, since it matches with p+qi. The other root must be 4-7i since it matches with p-qi.

In short, we flip the plus to a minus when going from 4+7i to 4-7i. All of this applies when we have a,b,c as real numbers.

If we allowed a,b,c to be complex numbers, then the roots may not necessarily come in conjugate pairs.

Answer:

4

Step-by-step explanation:

2(8)-3(4)

16-12

4

Answer:

[tex]\boxed {\boxed {\sf 250 \ people}}[/tex]

Step-by-step explanation:

Let's set up a proportion using the following setup.

[tex]\frac {buses}{people}=\frac {buses}{people}[/tex]

We know 30 buses can carry 1,500 people.

[tex]\frac {30 \ buses}{1500 \ people}=\frac {buses}{people}[/tex]

We don't know how many people 5 buses can carry, so we say 5 buses carry x people.

[tex]\frac {30 \ buses}{1500 \ people}=\frac {5 \ buses}{x \ people}[/tex]

[tex]\frac {30 }{1500 }=\frac {5 }{x }[/tex]

Cross multiply. Multiply the numerator of the first fraction by the second fraction's denominator. Then, multiply the first denominator by the second numerator.

[tex]30*x=1500*5\\30x=7500[/tex]

Solve for x. It is being multiplied by 30. The inverse of multiplication is division. Divide both sides by 30.

[tex]30x/30=7500\\x=250[/tex]

5 buses can carry 250 people.

D1=25°

B3=25°

B1=30°

Step-by-step explanation:

1. O1+O2=360°(revolution)

310°+O2=360°

O2=360°-310°

=50°

O2=2D1(centre theorem)

50°=2D1

D1=25°

2. D1=B3=25°(tan chord theorem)

3. B2+B3=A=60°(tan chord theorem)

B1+B2+B3=90°(Radius perpendicular Tangent)

B1+60°=90°

B1=90°-60°

=30°

Answer:

[tex] \displaystyle V_{ \text{pyramid}}= 64 \: {cm}^{3} [/tex]

Step-by-step explanation:

we are given surface area and the length of the square base

we want to figure out the Volume

to do so

we need to figure out slant length first

recall the formula of surface area

[tex]\displaystyle A_{\text{surface}}=B+\dfrac{1}{2}\times P \times s[/tex]

where B stands for Base area

and P for Base Parimeter

so

[tex] \sf\displaystyle \: 144=(8 \times 8)+\dfrac{1}{2}\times (8 \times 4) \times s[/tex]

now we need our algebraic skills to figure out s

simplify parentheses:

[tex] \sf\displaystyle \: 64+\dfrac{1}{2}\times32\times s = 144[/tex]

reduce fraction:

[tex] \sf\displaystyle \: 64+\dfrac{1}{ \cancel{ \: 2}}\times \cancel{32} \: ^{16} \times s = 144 \\ 64 + 16 \times s = 144[/tex]

simplify multiplication:

[tex] \displaystyle \: 16s + 64 = 144[/tex]

cancel 64 from both sides;

[tex] \displaystyle \: 16s = 80[/tex]

divide both sides by 16:

[tex] \displaystyle \: \therefore \: s = 5[/tex]

now we'll use Pythagoras theorem to figure out height

according to the theorem

[tex] \displaystyle \: {h}^{2} + (\frac{l}{2} {)}^{2} = {s}^{2} [/tex]

substitute the value of l and s:

[tex] \displaystyle \: {h}^{2} + (\frac{8}{2} {)}^{2} = {5}^{2} [/tex]

simplify parentheses:

[tex] \displaystyle \: {h}^{2} + (4 {)}^{2} = {5}^{2} [/tex]

simplify squares:

[tex] \displaystyle \: {h}^{2} + 16 = 25[/tex]

cancel 16 from both sides:

[tex] \displaystyle \: {h}^{2} = 9[/tex]

square root both sides:

[tex] \displaystyle \: \therefore \: {h}^{} = 3[/tex]

recall the formula of a square pyramid

[tex]\displaystyle V_{pyramid}=\dfrac{1}{3}\times A\times h[/tex]

where A stands for Base area (l²)

substitute the value of h and l:

[tex] \sf\displaystyle V_{ \text{pyramid}}=\dfrac{1}{3}\times \{8 \times 8 \}\times 3[/tex]

simplify multiplication:

[tex] \sf\displaystyle V_{ \text{pyramid}}=\dfrac{1}{3}\times 64\times 3[/tex]

reduce fraction:

[tex] \sf\displaystyle V_{ \text{pyramid}}=\dfrac{1}{ \cancel{ 3 \: }}\times 64\times \cancel{ \: 3}[/tex]

hence,

[tex] \sf\displaystyle V_{ \text{pyramid}}= 64 \: {cm}^{3} [/tex]

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Answer: Don't run the water, make sure not to touch the ring unless you are 100% sure you can get it, use a hook.

Explanation:

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer:

(5,4)

Step-by-step explanation:

....................

Answer:

30 ft

Step-by-step explanation:

This situation forms a right triangle

a ² +b ²= c ²

50 ² + 40 ²= c ²

2,500 + 1,600 = c ²

900  = c ²

√900 = √c²

30 = c

Answer:

D

Step-by-step explanation:

Answer:

A is the right answer of your question but....

I m little bit doubtful about that

The area of the rectangle that measures 2 4/5 inches by 2 1/5 inches is: 6.16 inches².

Area of a rectangle = (length)(width).

Given the following:

Area of the rectangle = (2.8)(2.2)

Area of the rectangle = 6.16 inches²

Learn more about the area of rectangle on:

https://brainly.com/question/25292087

#SPJ1

Answer:

16

Step-by-step explanation:

Have a nice day :)

Answer:

8 quarts = 16 pints

Step-by-step explanation:

Answer:

a

Step-by-step explanation:

can i get a brainliest

Answer:

0?

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Answer:

b = 19

Step-by-step explanation:

To make it short and sweet, since one angle is 45 degrees and one angle is 90 degrees, the unknown angle is 45 degrees also. That makes it an isosceles triangle with both legs equal.

b = 19

Answer:

this is your answer look it once.

Answer:

this is your answer look it once:

Answer:

58°+90°+x=180°

148°+x=180°

x=180°+148°

x= 32° is your answer ☺️☺️☺️

Answer:

32

Step-by-step explanation:

Answer:

it shows percentage of an item or anything else

Answer:

categorical

Step-by-step explanation:

A circle graph is a way of summarizing a set of categorical data or displaying the different values of a given variable.

Answer:

D

Step-by-step explanation:

2 * sqrt(8) + 2 * sqrt(18) = 14

Answer:

Volume of a right prism = 65 cubic inches

Its height is increased by a factor of 20.

To find:

The new volume of the prism if the other dimensions do not change.

Solution:

The volume of a prism is:

[tex]Volume=Bh[/tex]

Where, B is the base area and h is the height.

A right prism has a volume of 65 cubic inches.

[tex]65=Bh[/tex]

The height of prism is increased by a factor of 20. So, the new volume is:

[tex]Volume=B(20h)[/tex]

[tex]Volume=20(Bh)[/tex]

[tex]Volume=20(65)[/tex]

[tex]Volume=1300[/tex]

The volume of the new prism is 1300 in³.

Therefore, the correct option is B.

Answer:

4996

Step-by-step explanation:

Help this help:)

500x10-4= 4996

Answer:

1 x 10 - 4 x 500 = 4,996 meters thick.

Step-by-step explanation:

Answer:

22

Step-by-step explanation:

Answer:

Reflection

Step-by-step explanation:

A reflection is if a shape was flipped to the other side. The side can be the x or y axis.

Answer:

Reflection

Step-by-step explanation:

Answer:

\tan \left(θ\right)=\frac{\sqrt{3}}{3}

Step-by-step explanation:

Answer: the answer is d

Step-by-step explanation: I did the USA test prep

Answer:

D) No car is expected to average between 33-37 miles per gallon.

Step-by-step explanation: USATESTPREP

Answer:

frog

Step-by-step explanation:

Answer:

74.054 rounded to the nearest tenth is equivalent to 74.1

Step-by-step explanation:

Since you're rounding 74.054 to the nearest tenth, you need to focus on the hundredths place. If the number on the hundredths place is greater than or equal to 5, then you round up. If not, keep the number in the tenths place the same. In this case, 5 is in the hundredths place, which means you need to round the 0 in the tenths place up by 1. So 74.054 rounded to the nearest tenths is equivalent to 74.1.

Answer:

The measure of Angle 2 would also be 57 degrees

Step-by-step explanation: