Gavin buys 7 rulers for £3.50 how much would 9 cost

Answers

Answer 1

Answer: 3.50 : 7 = 0.5
0.5 * 9 = 4.5
so the answer is £4.50

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I’ll give brainliest , 7th grade work .
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Prove the logarithm of 100 is 2

Answers

Because 10^2 is 100, the natural logarithm of 100 is 2 by the basic definition of logarithms.

Which is equivalent to (4xy – 3z)2, and what type of special product is it?16x2y2 + 9z2, the difference of squares
16x2y2 + 9z2, a perfect square trinomial
16x2y2 – 24xyz + 9z2, the difference of squares
16x2y2 – 24xyz + 9z2, a perfect square trinomial

Answers

Answer:

$16x^2y^2-24xyz +9z^2$

Step-by-step explanation:

$(4xy - 3z)^2$

Given expression has exponent 2, so we multiply it twice

$(4xy - 3z)(4xy-3z)$

Apply FOIL method to multiply the parenthesis

multiply 4xy inside the second parenthesis

and multiply -3z inside the second parenthesis

$4xy(4xy-3z)=16x^2y^2-12xyz$

$-3z(4xy-3z)=-12xyz+9z^2$

$16x^2y^2-12xyz-12xyz+9z^2$

Combine like terms

$16x^2y^2-24xyz +9z^2$

Hello,

Answer D
16x²y²-24xyz+9z² a perfect square trinomial which
le square of the difference of 3z from 4xy.

Given: 5 > x + 7. Choose the solution set.

{x | x R, x > -2}
{x | x R, x < -2}
{x | x R, x > 2}
{x | x R, x < 2}

Answers

Answer:

{x | x R, x < -2}

Step-by-step explanation:

Answer:

x is less than negative 2

Step-by-step explanation:

Using the properties of addition, we move the 7 over to the five, making it negative.

This makes negative 2 because we subtract 7 from 5.

Then, we can flip the equation to understand it better, making the x in the front.

This makes the final solution x is less than -2

Marya wants to factor the polynomial 36x3 – 22x2 – 144x. Which term can she add to the polynomial that would not change its greatest common factor? Check all that apply.–11
–50xy
–40x2
24
10y

Answers

Answer:

–50xy

–40x2

Will not change the Greatest Common Factor.

Step-by-step explanation:

Greatest common factor is the highest factor that divides 2 or more number.

We can find the GCF by multiplying all the factors that are common to each number.

Factors of $36x^(3)$ =1,2,3,4,6,9,12,18, 36 and $x$ , $x^(2)$ ,, $x^(3)$

Factors of $22x^(2)$ =1,2,11, $x$ and $x^(2)$

Factors of $144x$ =1,2,3,4,6,8,9,12,16,18,24,36 and $x$ and more.

So the common factors to all three numbers are 1,2 and x.

So GCF = $1*2*x=2x$

If we use 11 it will change the GCF to 11.

If we use $50xy$ it will not change the GCF.

If we use 40 $40x^(2)$ it will not change the GCF.

IF we use 24 it will change the GCF.

If we use 10y it will change the GCF.

Given:

36x³ - 22x² - 144x

GCF:
36 ÷ 2 = 18
18 ÷ 2 = 9
9 ÷ 3 = 3

22 ÷ 2 = 11

144 ÷ 2 = 72
72 ÷ 2 = 36
36 ÷ 2 = 18
18 ÷ 2 = 9
9 ÷ 3 = 3

2 is the GCF of all terms. We can add 24. It would not change the GCF of the polynomial.

36x³ - 22x² - 144x + 24

2(18x³ - 11x² - 72x + 12)

Is 9 rational or irrational?

Answers

Answer:

9 is a rational number.

Step-by-step explanation:

Answer:

irrational

Step-by-step explanation:

How the number 9 is irrational is that irrational numbers are numbers that are not expressed as fractions or decimals. So some examples of irrational numbers is 1,2,6,22,12,9

can I get brainlest?

4⋅(tg(π−x)+ctg(π−x)+ctg(3π2−x))/ctg(π−x)

Answers

$tan( \pi -x)=-tan(x) \n cot( \pi -x)= -cot(x) \n cot( (3 \pi )/(2) -x)=tan(x) \n \n \n (tan( \pi -x)+cot( \pi -x)+cot( (3 \pi )/(2) -x))/(cot( \pi -x)) = (-tan(x)-cot(x)+tan(x))/(-cot(x)) = (-cot(x))/(-cot(x)) =1$

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A set of equations is given below: Equation S: y = x + 9 Equation T: y = 2x + 1 Which of the following steps can be used to find the solution to the set of equations? x = 2x + 1 x + 9 = 2x x + 1 = 2x + 9 x + 9 = 2x + 1