MATHEMATICS HIGH SCHOOL

Solve the given equation. State the number and type of roots.
x^2+2x-8=0

Answers

Answer 1
Answer: I hope this helps you

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A painter worked 142 days last year. His total earnings for that time was $13,916. His approximate daily wage was___​

I WILL GIVE BRAINLEST PLEASE HELPWhich of the following is an example of the difference of two​ squares?
A x2−9
B x3−9
C (x+9)2
D (x−9)2
I know the answer is either A or B i might be wrong tho pls help im not sure.

Answers

Answer:

A

Step-by-step explanation:

In this question, we are concerned with selecting which of the options best represents the difference of two squares.

Let’s have an exposition below as follows;

Consider two numbers, which are perfect squares and can be expressed as a square of their square roots;

a^2 and b^2

where a and b represents the square roots of the numbers respectively.

Inserting a difference between the two, we have;

a^2 - b^2

Now by applying the difference of two squares, these numbers will become;

a^2 - b^2 = (a + b)(a-b)

So our answer out of the options will be that option that could be expressed as above.

The correct answer to this is option A

Kindly note that;

x^2 -9 can be expressed as x^2 - 3^2 and consequently, this can be written as;

(x-3)(x + 3)

Lia has already written 3 pages, and she expects to write 2 pages for every additional hour spent writing. How many hours will Lia have to spend writing this week in order to have written a total of 7 pages? Write and solve an equation to find the answer.

Answers

Required equation : 7 = 2h+ 3. Lia have to spend 2 hours writing this week in order to have written a total of 7 pages.

What is equation?

" Equation is defined as the algebraic expression which represents the relation between given variables using sign of equality."

According to the question,

Number of pages Lia has already written = 3

Time taken to write 2 pages = 1hour

Total number of pages Lia has to write = 7

'h' represents the time required to write total 7 pages

As per the given condition equation we get,

7 = 2h + 3\n\n\implies 2h = 7- 3\n\n\implies 2h = 4\n\n\implies h = 2hours

Hence, required equation : 7 = 2h+ 3.Lia have to spend 2 hours writing this week in order to have written a total of 7 pages.

Learn more about equation here

brainly.com/question/10413253

#SPJ3

7 =(2 × M) + 3

M = 2

It will be two hours

A coin is tossed ten times. The probability of heads on each toss is 0.5. Evaluate the probability of getting exactly 6 heads.

Answers

The probability of getting exactly 6 heads is: 10!/6!(10-6)! * (1/2)^6 (1 - 1/2)^4 = 0.205 or 20.6 %

What is the value of the ratio of the surface area to the volume of the right prism? A.
1.4

B.
1.07

C.
0.94

D.
0.7

length is 6
height is 3
width is 5

Answers

so first fin the area then surface area and the volume
volume=legnth times width times heigh ttimes width=3 times 5 times 6=90
volume=90
surface area=(2 times 3 times 5)+(2 times 3 times 6)+(2 times 5 times 6)=(2 times 15)+(2 times 18)+(2 times 30)=30+36+60=126

volume=90
surface area=126
radio fo surface area to volume
90:126
simplify and treat as fraction
5:7
since they area all decimals they expect us to divide
5/7=.714
the closest answer is D, 0.7

the answer is D 0.7

The answer is A. 1.4

Simplify. a2 · a5 a3 A) a3 B) a4 C) a7 D) a10

Answers

Answer:

its B , a4 i jus took the test & got a 100 .

Step-by-step explanation:

a^(10), that is D

when multiplying like variables add the exponents

= a^(2+3+5) = a^(10)

A candle manufacturer sells cylindrical candles in sets of three. Each candle in the set is a different size. The smallest candle has a radius of 0.5 inches and a height of 3 inches. The other two candles are scaled versions of the smallest, with scale factors of 2 and 3. How much wax is needed to create one set of candles? in cubic inches

Answers

To find out how much wax is needed for the candles we need to figure out the volume of each candle. We know radius r=0.5 inches and height h=3 inches of the smallest candle and we know that the middle candle has r2=2r=1 inch and h2=2h=6 inches and the biggest candle has r3=3r=1.5 inches and h3=3h=9 inches. So now we need the formula for volume: V=pi*r^2*h and we simply plug in the numbers. First candle is V=3.14*(0.5^2)*3=2.355 inches^3. Middle candle: V2=3.14*(1^2)*6=18.84 inches^3. Biggest candle: V3=3.14*(1.5^2)*9=63.585 inches^3. So overall wax needed to create all three candles is V+V2+V3=2.355 inches^3 + 18.84 inches^3 + 63.585 inches^3=84.78 inches^3.

Answer:

First candle is V=3.14*(0.5^2)*3=2.355 inches^3. Middle candle: V2=3.14*(1^2)*6=18.84 inches^3. Biggest candle: V3=3.14*(1.5^2)*9=63.585 inches^3. So overall wax needed to create all three candles is V+V2+V3=2.355 inches^3 + 18.84 inches^3 + 63.585 inches^3=84.78 inches^3.

Step-by-step explanation:
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