Mathematics High School

pLS help me with thisss:((((((​

PLS Help Me With Thisss:((((((

Answers

Answer 1

Answer:

C and B

Step-by-step explanation:

(6)

[tex]\frac{3x-7y}{8}[/tex] × [tex]\frac{6}{3x-7y}[/tex] ← cancel 3x - 7y on numerator and denominator

= [tex]\frac{1}{8}[/tex] × [tex]\frac{6}{1}[/tex] = [tex]\frac{6}{8}[/tex] = [tex]\frac{3}{4}[/tex] → C

(7)

[tex]\frac{6x}{x^2-9}[/tex] ÷ [tex]\frac{8}{4x-12}[/tex]

Factorise the denominators of both fractions

x² - 9 = x² - 3² = (x - 3)(x + 3) ← difference of squares

4x - 12 ← factor out 4 from each term

= 4(x - 3)

Then rewrite as

[tex]\frac{6x}{(x-3)(x+3)}[/tex] ÷ [tex]\frac{8}{4(x-3)}[/tex] ← cancel 8 and 4 by 4

= [tex]\frac{6x}{(x-3)(x+3)}[/tex] ÷ [tex]\frac{2}{x-3}[/tex]

• leave first fraction, change ÷ to × , turn second fraction ' upside down'

= [tex]\frac{6x}{(x-3)(x+3)}[/tex] × [tex]\frac{x-3}{2}[/tex] ← cancel x - 3 on numerator and denominator

= [tex]\frac{6x}{x+3}[/tex] × [tex]\frac{1}{2}[/tex] ← cancel 2 and 6 on numerator and denominator

= [tex]\frac{3x}{x+3}[/tex] → B

Related Questions

Which of the ratios below is equivalent to 5:2? Select all that apply.

A) 6:3
B) 10:25
C) 20:8
D) 10:4
E) 30:12

Answers

Answer:

Your answer to this question is C, D, and E.

Step-by-step explanation:

A and B are incorrect.

a³-a²b-ab²+b³hihihihihihihi

Answers

Refer to the attachment
a³ + b³ = (a + b)(a² – ab + b²)

If 2 coins can be exchanged for 3.3782 dubloons, how many dubloons can be obtained for 9 coins?

(Round to the nearest hundredth)

Answers

Answer:

5.33

Hope this helps

What is m∠1? m∠1 =
?

Answers

Step-by-step explanation:

m<1(exterior angle) = (sum of two opposite interior angle) 50+70 = 120°.

hope this helps you.

Answer:

120 degrees

Step-by-step explanation:

50 + 70 = 120

180 - 120 = 60

180 - 60 = 120 degrees

there were a total of 35 football games in the season the season is played for five months how many football games were played each month if each month has the same number of games​

Answers

Answer:

7

Step-by-step explanation:

35/5=7

Hope this helps!

Answer: We know that there is 35 games per season and is played throughout 5 months. If in each month the same number of games were played we would have to do 35/5 which is equal to 7. To check your work you can do 5 times 7 which is 35. Remeber opposite of division is multiplication and opposite of multiplication is division. SO, your answer is 7 football games per month.

Step-by-step explanation:

Hope this helps, if you are struggling with math you can use these sites:

khan academy

math nation

and many more free sites to learn math!

hi help pls will mark as brainlist!!!!!!!!!​

Answers

Answer:

The answer would be B.) 30.

Step-by-step explanation:

If it took 15 workers 20 day, and you want to split it so it gets done in 10 days, you would want 15 more workers to get the job done quicker, doing this would have you a total of 30 workers.

what is 4x+2=-12+6x?????????

Answers

Answer:

x=7

Step-by-step explanation:

0.13391963118/17(3.78)

Answers

Answer:

Simplify the expression.

0.02977742

Step-by-step explanation:

i think i hope its right

The value of
[tex]2 + \frac{1}{2 + \frac{1}{2 + \frac{1}{2 + ... \infin} } } \: is \\ [/tex]
Given answer with step by step explanation.​

Answers

[tex]\large\underline{\sf{Solution-}}[/tex]

We have to find out the value of the fraction.

Let us assume that:

[tex] \sf \longmapsto x =2 + \dfrac{1}{2 + \dfrac{1}{2 + \dfrac{1}{2 + ... \infty} } } [/tex]

We can also write it as:

[tex] \sf \longmapsto x =2 + \dfrac{1}{x} [/tex]

[tex] \sf \longmapsto x =\dfrac{2x + 1}{x} [/tex]

[tex] \sf \longmapsto {x}^{2} =2x + 1[/tex]

[tex] \sf \longmapsto {x}^{2} - 2x - 1 = 0[/tex]

Comparing the given equation with ax² + bx + c = 0, we get:

[tex] \sf \longmapsto\begin{cases} \sf a =1 \\ \sf b = - 2 \\ \sf c = - 1 \end{cases}[/tex]

By quadratic formula:

[tex] \sf \longmapsto x = \dfrac{ - b \pm \sqrt{ {b}^{2} - 4ac } }{2a} [/tex]

[tex] \sf \longmapsto x = \dfrac{2 \pm \sqrt{ {( - 2)}^{2} - 4(1)( - 1)} }{2 \times 1} [/tex]

[tex] \sf \longmapsto x = \dfrac{2 \pm \sqrt{4 + 4} }{2 \times 1} [/tex]

[tex] \sf \longmapsto x = \dfrac{2 \pm \sqrt{8} }{2} [/tex]

[tex] \sf \longmapsto x = \dfrac{2 \pm2 \sqrt{2} }{2} [/tex]

[tex] \sf \longmapsto x = 1 \pm\sqrt{2}[/tex]

[tex] \sf \longmapsto x = \begin{cases} \sf 1 + \sqrt{2} \\ \sf 1 - \sqrt{2} \end{cases}[/tex]

But "x" cannot be negative. Therefore:

[tex] \sf :\implies x = 1 + \sqrt{2}[/tex]

So, the value of the fraction is 1 + √2.

This is 3 of 3 problems I need help with

Answers

Answer:

x=65

Step-by-step explanation:

X =65

180-140= 40 the other inside angle next to the 140
180-40-25= 115 last inside angle of the triangle
180 -115= 65 angle x

what is 5713 – 75 =
show your workings out

Answers

Answer:

5713 - 75

= 5638

Step-by-step explanation:

brainliest plz

A dresser with the mirror attached is 6.28 feet tall. The difference between their heights is 1.28 feet. What are the heights of the dresser and the mirror by themselves? Let the height of the dresser and the height of the mirror = y. =x

Answers

Answer:

Step-by-step explanation:

y = dresser height

x = mirror height

x+y=6.28

x-y = 1.28

x = 1.28+y

x+y=6.28

(1.28+y)+y=6.28

2y = 5

y = 2.5

Dresser = 2.5 ft

Dresser + Mirror = 2.5 + 1.28 = 6.28 ft

Mirror = 1.28 ft

cheryis softball batting average in 0.340 and karins is 0.304 kartin says they have the same avarge what error did she make explain

Answers

She made an error , 0.340 is bigger because of the ones and tens place being switched

Which rule explains why these triangles are congruent?

Answers

The triangles are congruent due to SAS

Answer:

SAS is the rule

Step-by-step explanation:


Given that BD ~ BC, find m A. 54
B. 57
C. 64
D. 66

Answers

Answer:

b

Step-by-step explanation:

Answer:

B)  57

Step-by-step explanation:

since BD ≅ BC then ∡C = ∡D

6x-9 = 3x + 24

subtract 3x from each side to get:

3x-9 = 24

add 9 to each side to get:

3x = 33

divide each side by 3 to get:

x = 11

substitute 11 into 'x' in 3x + 24 to get:

3(11) + 24 = 33+24 = 57

check:

substitute 11 into 'x' in 6x - 9 to get:

6(11) - 9 = 66 - 9 = 57

easy algebra answer asap!!

Answers

Step-by-step explanation:

f(-1) =4.5

use this desmos, desmos is the best graphing calculator

Sven participates in his employer’s 401k plan. His annual salary is $52,000. Sven contributes 7.5% of his annual salary. His employer matches his contributions up to 5% of his salary. How much money will be contributed to Sven’s plan for one year?

Answers

Answer:

$ 6,500

Step-by-step explanation:

(52,000)(0.075)+(52,000)(0.05) = 3,900 + 2,600

= 6,500

a = 5/3 right angle,find b​

Answers

Answer: i can't

Step-by-step explanation: what b

there's no picture attached

does b have any value?

put a picture and i'll edit my answer

Please help me I am very confused and I can’t get it wrong!!!!

Answers

Answer:

The answer that you are looking for is b

A small bookstore sold between 5 and 8 books each day for 7 days. Tell whether the graph is continuous or discrete.

Answers

Answer:

i think the answer is contionous

How do you line graph Y equals 7X -8

Answers

Answer:

x

y

0

−

8

8

7

0

Graph the line using the slope and the y-intercept, or the points.

Slope:

7

y-intercept:

(

0

,

−

8

)

Step-by-step explanation:

MARK ME AS BRAINLIEST

oliver sewed a quilt 3 2/3 feet long and 2 1/4 feet wide. what is the area of her quilt?

Answers

Answer:

8.25 feet

Step-by-step explanation:

3 2/3 times 2 1/4 equals 8.25

what the frige please help​

Answers

Answer:

Your answer is A, 3x - 2x.

Step-by-step explanation:

Triple a number means to multiply it by 3.

Double a number means to multiply it by 2.

Difference means to subtract.

Hope this helps!

Answer:cim not sure tho

Step-by-step explanation:

just click on the image

Answers

Why does it have to be 20 characters The answer is -2/1

What is the sum of 6 4/5 and 6 4/5?
A. 12 4/5
B. 29/5
C. 0
D. -12 4/5

Answers

[tex]\bf6 \frac{4}{5} + 6 \frac{4}{5} = (6 + 6) \frac{4}{5} = 12 \frac{4}{5} [/tex]

>> Answer

________

6 4/5 + 6 4/5 = ...

= (6 × 2)4/5

= 12 4/5 (A.)


A cylinder closed tin of radius r cm is made from 600cm2 tin sheet of metal.
a.show that it’s height h cm is given by h =300- pi r /pi r

Answers

Answer:

Note:  The expression "h =300- pi r /pi r" would equate to 299, as written.  I find h = (300 - π[tex]r^{2}[/tex] )/πr to be the equation for height.

Step-by-step explanation:

The total surface area of a sylinder is 2πr(h+r) where h is the height and r is the radius.  That consists of top and bottom disks, each with an area of π[tex]r^{2}[/tex], for a total of 2π[tex]r^{2}[/tex].  The side is a  continous sheet that has an area of 2πrh, where h is the height.  2πr is the circumference of the can, so the surface area of the side is 2πrh.

The total surace area of a closed cylinder is therefore 2π[tex]r^{2}[/tex] + 2πrh.

2π[tex]r^{2}[/tex] + 2πrh = 600

π[tex]r^{2}[/tex] + πrh = 300

πrh = 300 - π[tex]r^{2}[/tex]

h = (300 - π[tex]r^{2}[/tex] )/πr

Compute the average rate of change of f(x)=(x+4)/(x-3) over the interval [5,7].
A)4/3
B)7/8
C)-7/8
D)-4/3
(Image attached below)

Answers

Answer:

C) - 7/8

Step-by-step explanation:

Average rate of change is:

[f(7) - f(5)]/(7 - 5)

Find the values and substitute into expression:

f(7) = (7 + 4)/(7 - 3) = 11/4f(5) = (5 + 4)/(5 - 3) = 9/2 = 18/4

Find the rate of change:

(11/4 - 18/4)/2 = (-7/4)/2 = - 7/8

Correct choice is C

Which set of numbers shows one number that is about 20 times greater than the other number?

Answers

Using the division operation, the set of number of in which the larger number is about 20 times greater than the lesser number is depicted by the options C and D.

Evaluating each set of number :

1.)

[tex]\frac{2.01 \times 10^{7}}{4.25 \times 10^{6}} = 4.73 [/tex]

2.)

[tex]\frac{4.91 \times 10^{6}}{5.09 \times 10^{3}} = 964.64 [/tex]

3.)

[tex]\frac{8.21 \times 10^{-3}}{4.13 \times 10^{-4}} = 19.88 [/tex]

4.)

[tex]\frac{5.97 \times 10^{4}}{3.12 \times 10^{3}} = 19.13[/tex]

Therefore, the set of numbers which shows a number being about 20 times greater than the other are options C and D

Learn more :https://brainly.com/question/18796573

Solve. −6 1/4x=−3 1/8 What is the solution to the equation? Enter your answer as a simplified fraction in the box.

solve for x

Answers

X would be equal to -0.5

Answer:

its 1/2 did the k12 quiz :)

What is the answer to (66*47)+(85*68)=t?
?

Answers

Answer:3102+5780=8882

Step-by-step explanation:

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