MATHEMATICS HIGH SCHOOL

Pls find m<1 TYSM! **the answer is not 40**
Pls find m&lt;1 TYSM! **the answer is not 40** - 1

Answers

Answer 1
Answer:

Step-by-step explanation:

Does that make sense to u??

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Jerry had an average score of 85 on his first 8 quizzes. He had an average score of 81 on his first nine quizzes. What score did he earn on his ninth quiz? side note: I got 49 the first time i tried it but when i checked it, it was wronfg

Answers

Well, let's calculate how many points in total he got so far!

He did 8 quizzes, on average 85 points: 85*8=680 points.

He scored a number of points in his ninth quiz, let's call this number "x".

If we want to calculate the average after the ninth quiz, we take the sum of points then (which is 680+x) and we divide it by 9:

(680+x)/9

we also know that this is equal to 81:

(680+x)/9=81

((680+x))/(9)=81

multiply both sides by 9:

(680+x)}=729

substracting 680 from both sides:

x=49

well, i got 49 too.

I really can't see where the mistake could be?

where did you check it? my best guess is that the place where you checked it had a typo...?

3x + y = 17 and 4x - y = 18

Answers

I'm not sure if this is what you're asking for but here goes...
3x + y = 17
+ 4x - y = 18
———————
7x = 35
x = 5

sub x = 5 into eq. 1
3x + y = 17
(3 × 5) + y = 17
15 + y = 17
subtract 15 from both sides of the equation.
y = 2

Final Answer - ( 5 , 2 )
Hope this helped :)

What is the square root of 14x15

Answers

√(14\cdot15)=√(2\cdot7\cdot3\cdot5)=\n\vdots\ Any\ number\ does\ not\ repe at\ \vdots\n\n=√(210)\n\n\n√(210)\approx14.4914
well I know 14 times 15 = 210 but I cant tell what is a square root since I am just in 4th grade.

Sam takes out a $167,000 mortgage for 20 years. He makes monthly payments and at the end calculates that he has paid $240,141 towards the mortgage. What is the approximate APR?3%
4%
6%
7%

Answers

Answer:

About 3%

Step-by-step explanation:

3% of $167,000 is $5,010

5010 times the 20 years is 100200 add that to the 167000 and you get $267,200

The actual answer is about 2.4% but 3% is the closest.

Write the expression as either the sine, cosine, or tangent of a single angle. sin(pi/2)cos(pi/7)+cos(pi/2)sin(pi/7)

Answers

I will use the sin (a + b) identity: 
sin (a + b) = sina cosb + cosa sinb and
here a = π/2 and b = π/7 

so sin (π/2 + π/7) 
= sin (9π / 14)

Answer:

\text{sin}((9\pi)/(14)).

Step-by-step explanation:

We have been given a trigonometric expression \text{sin}((\pi)/(2))\text{cos}((\pi)/(7))+\text{cos}((\pi)/(2))\text{sin}((\pi)/(7)). We are asked to write our given expression as either the sine, cosine, or tangent of a single angle.

Using identity \text{sin}(a)\text{cos}(b)+\text{cos}(a)\text{sin}(b)=\text{sin}(a+b), we can rewrite our given expression.

Let a=(\pi)/(2) and b=(\pi)/(7).

Upon substituting these values in above identity, we will get:

\text{sin}((\pi)/(2))\text{cos}((\pi)/(7))+\text{cos}((\pi)/(2))\text{sin}((\pi)/(7))=\text{sin}((\pi)/(2)+(\pi)/(7))

Upon simplifying right side of our equation, we will get:

\text{sin}((\pi)/(2)+(\pi)/(7))=\text{sin}((\pi*7)/(2*7)+(\pi*2)/(7*2))

\text{sin}((\pi)/(2)+(\pi)/(7))=\text{sin}((7\pi)/(14)+(2\pi)/(14))

\text{sin}((\pi)/(2)+(\pi)/(7))=\text{sin}((7\pi+2\pi)/(14))

\text{sin}((\pi)/(2)+(\pi)/(7))=\text{sin}((9\pi)/(14))

Therefore, our required expression would be \text{sin}((9\pi)/(14)).

Which expressions are differences of squares?Choose all answers that are correct.
Question 2 options:

8b^2 – 16c^6

16e^8 – 81g^4

49x^25 – 4y^16

121m^18 – 9n^10

Answers

difference of 2 perfec squares is
(a^2)-(b^2)




if the exponents are both even and the coeficient (the number in front) are perfect squares, then it is difference t 2 perfect squares

first one
8 is not perfect square


2nd one
(4e^4)^2-(9g^2)^2


third
25 is odd, so it cannot be split up into 2 nice numbers

4th
(11m^9)^2-(3n^5)^2
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