I need help on #20. Please provide step by step explanations pls!

Answer:

[tex]f(x) = - 2x {}^{2} - 2x + 10 \\ f(2) = - 2(2) {}^{2} - 2(2) + 10 \\ f(2) = - 2(2 \times 2) - 4 + 10 \\ f(2) = - 2(4) - 4 + 10 \\ f(2) = - 8 - 4 + 10 \\ f(2) = - 2 \: \: \: \: \: \: \: answer[/tex]

Step-by-step explanation:

please mark me brainliest please

Answer:

234

Step-by-step explanation:

By Euclidean Algorithm on 13 and 18, we found that 13(7)+18(−5)=1.

Then we multiply the equation by n, we got  

13(7n)+18(−5n)=n.

Thus 13(7n)+18(−5n)=n always has integer  solution.

However, a and b must be positive integers. So we need to reduce 7n and increase -5n  

to make them positive. Noting that13(18m)=18(13m)∀m∈Z.

⇒13(7n−18m)+18(−5n+13m)=n⋯(1)

Let a=7n−18m and b=−5n+13m.Since a and b are positive integers, we have two inequalities:

7n−18m>0 and −5n+13m>0

⇒5n13<m<7n18⋯(2)

In order to make 13a+18b=n has no solutions,n must be taken to make (2) is impossible.

That means there exists no such integer m lying in the interval (5n13,7n18).

As a consequence, the difference between  

5n13 and 7n18 must not greater than 1.

7n18−5n13≤1⇒n13×18≤1⇒n≤234.

Let’s put the largest candidate n=234 into (2), we get 90<m<91 ⇒ m is not an integer, which is a contradiction!

Therefore the largest integer n to make 13a+18b=n has no positive integer solutions is 234.

Original Link: https://www.quora.com/If-a-and-b-must-be-positive-integers-what-is-the-largest-integer-n-such-that-13a-18b-n-has-no-solutions

Answer: m=-2/1 or m=-2

Step-by-step explanation: The line is going downwards by 2s and towards the right by 1s

Answer:

121,000

Step-by-step explanation:

AnswerHere is the Answer

Step-by-step explanation:

Answer:

No

Step-by-step explanation:

if your asking is 10 to the power of 4 is 1000000000000, it is not. 10 to the power of 4 is 10000

Answer:

b. 252

Step-by-step explanation:

[tex]\frac{252}{3}[/tex] =84

Hence 252 is exactly divisible by 3.

Answer:

ggdsshkurszcnkutedgnkiydxcnkiutfdfcvjkhfdgjkkknvvffdggjjbfddghb so

Answer:

Answer:

1≤x<10, meaning x must be greater than or equal to 1 and less than 10

Step-by-step explanation:

Answer:

47

Step-by-step explanation:

3(7x-3) -2(4x-2) when x=4

3(7*4-3) -2(4*4-2)

3(25)-2(14)

75-28=47

the answer is 47

Answer:

51,84

Step-by-step explanation:

The area of the square if side * side, so 7.2 * 7.2 = 51,84 square inches

Answer:

G

Step-by-step explanation:

three line segments : HI, EF, and JG,

intersect in one point => G

Three axis given

[tex]\\ \sf\longmapsto \overleftrightarrow{HI}[/tex]

[tex]\\ \sf\longmapsto \overleftrightarrow{EF}[/tex]

[tex]\\ \sf\longmapsto \overleftrightarrow{GJ}[/tex]

Now

All are intersected at one point G

Answer:

20 times 4 is 80  so It will take Luke 80  minutes to complete the essay

Step-by-step explanation:

If 20 labourers=10 days

x labourers = 25 days

10x= 25×20

[tex] \frac{10x}{10} = \frac{25 \times 20}{10}[/tex]

Cancelling out by 10 on both sides

[tex]x = \frac{25 \times 2}{1} \\ x = 50 [/tex]

Therefore, it takes 50 labourers to complete the work at the same rate in 25 days.

Answer:

the fraction of 6/7 divided by 2 is 3/7

Answer:

Vale 95.

Me rebajan 27.

95-27=68

Me costará 68.

Step-by-step explanation:

Answer:

f(x) = 1000x + 3000

Step-by-step explanation:

the point (0,3000)

p2 (1,4000)

slope = (y2-y1) / (x2-x1)

= (4000 - 3000) /( 1-0)

slope = 1000 = m

y = mx + b

y=1000x + b

Use one of the points to find b :

3000 = 1000(0) + b

b = 3000

f(x) = 1000x + 3000

Answer:

12/5t

Step-by-step explanation:

When is says "quotient" you have to divide.

When it says "product" you have to multiply.

The back slash means divide btw

Answer:

3

Step-by-step explanation:

I appreciate the satire

Answer:

3

Step-by-step explanation:

if u have to apples and u add 1 one how many do u have ? 3

Answer:

16+21/8-6 simplifies to 13

Hope this helps!!

Answer:

D. 13

Step-by-step explanation:

Step 1:

16 + 24 / 8 - 6

Step 2:

16 + (24 / 8) - 6

Step 3:

16 + 3 - 6

Step 4:

(16 + 3) - 6

Step 5:

19 - 6

Answer = 13

Hope it helps :)

Answer:

the first option -

x is an element of R with x not equaling

-4 or (-3/5)

Answer:

[tex] \frac{2}{3} h - \frac{1}{3} h + 11 = 8 \\ \\ \frac{1}{3} h + 11 = 8 \\ \\ \frac{1}{3} h = 8 - 11 \\ \\ \frac{1}{3} h = - 3 \\ \\ h = - 3 \div \frac{1}{3} \\ \\ h = - 3 \times 3 \\ h = - 9[/tex]

I hope I helped you^_^

100-10=90

90÷2=45

Mr Bergen's age=45+10

=55 years old

Mrs Bergen's age=45 years old

Answer:

Friend ship is abstract

Step-by-step explanation:

Abstract-

Happiness, Laughter, Anger, Friendship, patience, love, knowledge, freedom, pride.

Concrete-

Silk, Bicycle, frog, car, conversation, Clock, pencil.

Answer:

100002

Step-by-step explanation:

bi the react

Answer:

Use a mixed fractional calculator. No one is gonna help u with this many questions...

https://www.calculatorsoup.com/calculators/math/mixednumbers.php

GL

Step-by-step explanation:

Multiply [tex]170\cdot0.4=68[/tex]

A 170 pound astronaut would weigh 68 pounds on mars.

Hope this helps :)

Answer:

34

Step-by-step explanation:

x + 1, x + 2

2x + 3 = 71

71 - 3 = 68 / 2 = 35, 36

x = 34