please show work

8) 3n+1 +8n2 – 8n – 7

9. given the function: f(x) =3x-7, find f(-2)

Answer:

-13

Step-by-step explanation:

Answer:

t = -13

Step-by-step explanation:

2.6 = -0.2t         Equation

2.6 / -0.2 . = -0.2t/-0.2          Divide -0.2 on both sides

t = - 13       Simplify

Answer:

58000m

Step-by-step explanation:

he ran 35.5km+22.5km=58km

58km(1000m/km)=58000m

Answer:

Sara's number is 28

Step-by-step explanation:

Let's assign Sara's number the variable x and solve this equation using the information provided.

"If you subtract 14 from my number"

x - 14

"and multiply the difference by - 3"

-3(x - 14)

"the result is – 42."

-3(x - 14) = -42

Now we can solve from here for x.

-3(x - 14) = -42

x - 14 = 14

x = 28

Answer:

9383792994

Step-by-step explanation:

I the answer is 9383792994

Answer:

$12.65

Step-by-step explanation:

Given that the wall is 23 feet long and 8 feet high.

As the wall is rectangular, so the area of the wall,

A=23x8=184 square feet.

As a gallon of paint costs $11 and covers 320 square feet of area, so

Cost of paint for 1 square foot area = $ 11/320 per square foot.

Cost for 1 coat of paint = $ (11/320)x184

Cost for 2 coat of paint = $ (11/320)x184x2= $ 12.65

Hence, cost requires for 2 coats of paint is $ 12.65.

Answer:

18

Step-by-step explanation:

72% of 25 is 18.

Hope this helped! :)

7x+15=8.5x

x=10

Standard form:

−3

2

x + 15 = 0

Factorization:

−3

2

(x − 10) = 0

Solutions:

x = 30

3

= 10

Answer:

x=10

Step-by-step explanation:

5x+17 = 67

The angles are vertical angles which means they are equal.  This means the arc lengths are equal

5x+17-17 = 67-17

5x = 50

5x/5 = 50/5

x =10

Answer:

(2,2)

Step-by-step explanation:

Lets check:

(2,2)

2(2)-2=2 Correct !

2=-2+4 correct !

Hope this helps plz hit the crown :D

Answer:

i believe the answers (2,2)

Step-by-step explanation:

if you add it in for y and x  you will see it right

2/5 of the class is male

40% of the class is male

3/5 of the class is female

60% of the class is female

Not sure if this is right, but this is what I got.

Answer:

listen to the other guy

or girl

Step-by-step explanation:

It will take at least 14 weeks to have at least $500.

The relation between two unequal expressions is defined as inequality.

Given that, the person has $150 in his account and he deposits $25 each week into this account.

The amount in the account after w weeks is:
150 + 25w

Let the amount in the account after w weeks is at least $500, then  it follows:

150 + 25w ≥ 500

25w ≥ 500 - 150

25w ≥ 350

w ≥ 14

Hence, it will take at least 14 weeks to have at least $500.

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Answer:

percentage decrease,20%

Step-by-step explanation:

50_40 books=,10 bus

10|50 ×100%=20%

Answer:

decrease 20% trust me i got it right

Step-by-step explanation:

Answer:

$545.00

Step-by-step explanation:

250.7 / 23 = 10.9

$10.9 is the cost of every lb of onions.

Then we multiply 10.9 by 50 because there are 50 lbs. like this

10.9 * 50 = 545

So $545.00 is our answer.

Answer: 7               explanation:574[tex]%[/tex]%82=7  7x82=574

Answer:

compatible answer= 7.5

Real answer: 7

Step-by-step explanation:

Answer:

21 minutes

Step-by-step explanation:

Using the formula to calculate the time expressed as;

Speed = Distance/Time

Given:

Distance = 7/8 miles

Speed = 2 1/2 mi/hr

Required

Time in minutes

Substitute the given values into the formula;

Recall that:

S = D/T

T = D/S

Time = 7/8 ÷ 2 1/2

Time = 7/8 ÷ 5/2

Time = 7/8 * 2/5

Time = 7/4 * 1/5

Time = 7/20 hour

Since 1 hour = 60 minutes

7/20 hour = (7/20 * 60)minutes

7/20 hour = 7 * 3

7/20 hour = 21 minutes

Therefore it will take them 21 minutes to get to the campsite

Answer:

there are 120 apples in each basket and 5 are left over

Step-by-step explanation:

Answer:

There's no options

Step-by-step explanation:

Answer:

Options please

Step-by-step explanation:

Answer:

5,-4, 2,-4

Step-by-step explanation:

this is the correct answer luv

Answer:

57% 0.52 14/25 0.6

Step-by-step explanation:

all you have to do is change all of the numbers into decimals

hope this helps :)

First, convert each to the same (#/#, 0.#, or #%). I'll use decimals (usually the easiest). 0.52 and 0.6 remain the same. 14/25 may seem hard at first, but you can change it to 56/100 (14*4/25*4=56/100), then you can use that to convert to 56%. Multiply by 0.01, or divide by 100, remove the %, and you will get 0.56. For 57%, you just need to do repeat the last step again, which will give you 0.57. From least to greatest, the list would be 0.52, 0.56, 0.57, and 0.6, or 0.52, 14/25, 57%, and 0.6.

Answer:

I'm pretty sure it is (2,0)

Answer:

1/2

Step-by-step explanation:

slope is

m= y2-y1/ x2-x1= 6-5/2-0=1/2

Answer:

It's be 9. The opposing line is 8, and because it's slightly offset, I'd wager it's 9.

Let me know if you need more help! :)

I'm pretty sure its c

because 5280x65=343200

and 343200/60 is 5720

Answer: It’s 95 ft/s

Step-by-step explanation:

quiz

Answer:

The answer is b

Step-by-step explanation:

Answer:

Aida's error was B

Step-by-step explanation:

Answer:

5y^3 - 7y^2 - 97y + 2   <<<< Answer

Step-by-step explanation:

(у- 2)(5у2 + 3y - 1)

Multiply the three terms by y

5y^2 * y + 3y * y - 1*y = 5y^3 + 3y^2 - y

Multiply the three terms by - 2

-2*5y^2 -2*3y - 2*-1

-10y^2 - 6y + 2

Now combine the like terms

5y^3 + 3y^2 - 10y^2 - y - 6y + 2

5y^3 - 7y^2 - 97y + 2

Answer:

C.) y = 5/4 x

Step-by-step explanation:

5/4 multiplied by 0.4 is 0.5

Answer:

x = 25!

Hope This Helps!

Answer:B

Step-by-step explanation:

Option B is correct,  the inequality y≥-2x-2 is represented in the second graph or graph B.

Graph is a mathematical representation of a network and it describes the relationship between lines and points.

The given inequality is y≥-2x-2

y greater than or equal to minus two times of x minus two.

y≥-2x-2

The line passes through the points (-2, 2) and (0, -2).

As there is given greater than or equal to the line should be solid not dotted.

Greater than or equal to means we have to shade away from the origin.

The second graph satisfy all these properties.

y≥-2x-2 is represented in the second graph.

Hence, the inequality y≥-2x-2 is represented in the second graph.

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