All categories

3 years ago

Evaluate the function.

Mathematics

2 answers:

wolverine [178]3 years ago

7 0

Answer:

-87

Step-by-step explanation:

-(-7^2) + 6(-7) + 4

-49 -42 + 4

-87

andreyandreev [35.5K]3 years ago

5 0

Answer:

f(-7) = -3

Step-by-step explanation:

The exponentiation x^2 must be done before multiplication by the coefficient -1.

Substituting -7 for x, we get:

-(-7)^2 + 6(-7) + 4 = f(-7)

Then f(-7) = -49 + 42 + 4, or

f(-7) = -3

You might be interested in

An online furniture store sells chairs for $50 each and tables for $550 each. Every day, the store can ship a maximum of 20 piec

Leya [2.2K]

Answer:

If 9 chairs were sold, the store must sell 11 tables in order to meet the requirements.

Step-by-step explanation:

Selling price of each table = $50

Selling price of each table = $550

Let the number of chairs sold in a a day = x

Let Number of tables old in a a day = y

Hence, the selling price of x chairs = x times $50 = 50 x

and the selling price of y tables = y times $550 = 550 y

Maximum number of pieces that can be shipped = 20

⇒ x + y ≤ 20

Also, The total selling amount should at least be $5,000

⇒ 50 x + 550 y ≥ 5,000

Hence, the given system of equation is:

x + y ≤ 20

50 x + 550 y ≥ 5,000

Solving the given system:

put y = 20 - x from (1) in the equation (2), we get

50 x + 550 y = 5,000 ⇒ 50x + 550(20 -x) = 5000

or, 50x + 11,000 - 550x = 5000

or, -500x = -6000

x = 12

or the number of chairs sold at maximum = 12

also, y = 20- x = 20 - 12 = 8

So, number of tables sold at maximum = 8

Now, if the number of chairs sold = 9,

then the number of tables sold = 20 - 9 = 11

The selling amount is 50(9) + 550(11) = $6,500 > $5,000

Hence, 9 chairs were sold, the store must sell 11 tables in order to meet the requirements.

5 0

4 years ago

Depreciation is a process describing how something loses its value over time. A 2021 Ford F150 will lose 7% of its value each ye

Lerok [7]

Answer:

which book is this

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Mrs. Mathews buys deli meat for her kids lunches every week. This week she buys 3.75 pounds of ham. If she used 0.25 pounds of h

Fittoniya [83]

it's good but if u r hard-working

7 0

3 years ago

WILL GIIIIIVE BBBRRRRAAAIIINNNNLLLLLIIIEESSTTTT!!!!!

meriva

5y and 155 create a straight line so:

5y + 155 = 180
5y = 25
y = 5

5y and 13x create a 90 angle so:

5y = 5(5) = 25

25 + 13x = 90
13x = 65
x = 5

Hope this helps :)

3 0

3 years ago

Read 2 more answers

the quadratic p(x)=.65x squared - .047x +2 models the population p(x) in thousands for a species of fish in a local pond, x year

ivanzaharov [21]

Answer:

2007

Step-by-step explanation:

we have

$p(x)=0.65x^{2} -0.047x+2$

This is a vertical parabola open upward

The vertex represent a minimum

p(x) is the population in thousands for a species of fish

x is the number of years since 1997

Remember that p(x) is in thousands

If the population reach 66,530 fish

then

the value of p(x) is equal to

p(x)=66.53

substitute in the quadratic equation

$66.53=0.65x^{2} -0.047x+2$

$0.65x^{2} -0.047x+2-66.53=0$

$0.65x^{2} -0.047x-64.53=0$

Solve the quadratic equation by graphing

The solution is x=10 years

see the attached figure

therefore

Find the year

Adds 10 years to 1997

1997+10=2007

7 0

3 years ago