MATHEMATICS HIGH SCHOOL

Need some help with this math

Answers

Answer 1

Answer:

Answer:

4 $ on tax and 36 $ on purchase.hope this helps

Step-by-step explanation:

Answer 2

Answer:

Answer:

$44

Step-by-step explanation:

Let's set a proportion.

$40 - 100%

$x - 10%

(40 x 10) : 100= $4.

We found out how much is that 10% BUT Steve payed this amount on top of $40. So, $40+$4= $44.

So select 44

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Find the vertex of a function f(x)=-3x^2+9x-15 by completing the square

Answers

The vertex will be (3/2, - 33/4)

Can someone explain and answer this for me??

Answers

The mistake is in line 2, the parenthesis means multiplication therefore it has to be 3x

Identify the 42nd term of an arithmetic sequence where a1 = -12 and a27 = 66

Answers

The arithmetic formula is expressed as an = a1 + d *(n-1)where n is an integer. Substituting from the given a1 = -12 and a27 = 66, 66 = -12 + d *(27-1). hence , d is equal to 3. a42 thus using the formula is equal to 111. The final answer to this problem is 111.

Answer:

42nd term is 111

Step-by-step explanation:

$a_1=-12,a_(27)=66$

Now, Using formula of nth term of an A.P. we have :

$a_n=a+(n-1)* d\n\text{Take n=27}\n\implies a_(27)=-12+(27-1)* d\n\implies 66=-12+26\cdot d\n\implies 26\cdot d = 78\n\implies d = 3$

Now, first term a = -12 , n = 42 and d = 3

So, 42nd term is :

$a_(42)=-12+(42-1)* 3\n\implies a_(42)=-12+41* 3\n\implies a_(42)=-12+123\n\bf\implies a_(42)=111$

Hence, 42nd term is 111

( x − 3 )^2 as trinomial in standard form

Answers

Given (x - 3)^2, its trinomial in standard form, y = ax^2 + bx + c:

You must expand the binomial through FOIL method:

(x - 3)^2
x ^2 - 3x - 3x + 9

Combine like terms:

y = x^2 - 6x + 9
where a = 1, b = -6, and c = 9.

Please mark my answer as the Brainliest, if you find this solution helpful :)

Answer:

x^2 - 6x + 9

Step-by-step explanation:

Find a pair of irational numbers whose sum is irational

Answers

Answer:

√2 and √3

Good Luck!!!

Final answer:

A pair of irrational numbers whose sum is irrational does not practically exist. The sum of two irrational numbers can be either rational or irrational, and this solely depends on the numbers being added together.

Explanation:

The irrational numbers can be defined as any real number that is not a rational number. However, the sum of two irrational numbers is not always irrational. It could be rational or irrational depending on the numbers you're adding. However, you've asked for a case where the sum is also irrational. Let's consider two irrational numbers √2 and -√2. √2 is irrational. Likewise, -√2 is also irrational. However, when added (√2 - √2), they result in 0 which is not irrational. Therefore, it's near impossible to find two irrational numbers whose sum is also irrational.

Learn more about Irrational Numbers here:

brainly.com/question/4031928

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Determine the range of the following graph

Answers

Answer:

Step-by-step explanation:

Range: [3, 8]

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In which pair is the value of Expression A two times the value of Expression B?A. Expression A: 3 × (55 + 21)Expression B: 3 × (22 1/2 + 21)B. Expression A: (75 + 23)Expression B: (75 + 23) × 2C. Expression A: (44 + 32) × 8Expression B: (44 + 32) × 4D. Expression A: (3 × 55) + 42Expression B: (3 × 55) + 21