1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
coldgirl [10]
2 years ago
8

HELP PLZ I NEED THIS DONE ASAP

Mathematics
1 answer:
kodGreya [7K]2 years ago
8 0

\text{Given that,}\\\\y^2 +9y +3 \\\\\text{when}~ y = -2,\\\\(-2)^2 +9(-2) +3 = 4-18+3 = 7 -18 = -11,

You might be interested in
A boat is 122 meters from the base of a lighthouse. The lighthouse is 34 meters tall. The angle formed with the lighthouse and s
mojhsa [17]

Answer:

about 16°

Step-by-step explanation:

Make sure your calculator is in degree mode.

Drawing the right triangle, we see that the shorter leg is 34 meters, and the longer leg is 122 meters. So the angle of elevation is:

\tan( \alpha )  =  \frac{34}{122}

\alpha  =  { \tan }^{ - 1}  \frac{34}{122}  = 15.57

3 0
2 years ago
Outside temperature over a day can be modelled as a sinusoidal function. Suppose you know the high temperature for the day is 10
WINSTONCH [101]

Answer:

The function for the outside temperature is represented by T(t) = 85\º + 15\º \cdot \sin \left[\frac{t-6\,h}{24\,h} \right], where t is measured in hours.

Step-by-step explanation:

Since outside temperature can be modelled as a sinusoidal function, the period is of 24 hours and amplitude of temperature and average temperature are, respectively:

Amplitude

A = \frac{100\º-70\º}{2}

A = 15\º

Mean temperature

\bar T = \frac{70\º+100\º}{2}

\bar T = 85\º

Given that average temperature occurs six hours after the lowest temperature is registered. The temperature function is expressed as:

T(t) = \bar T + A \cdot \sin \left[2\pi\cdot\frac{t-6\,h}{\tau} \right]

Where:

\bar T - Mean temperature, measured in degrees.

A - Amplitude, measured in degrees.

\tau - Daily period, measured in hours.

t - Time, measured in hours. (where t = 0 corresponds with 5 AM).

If \bar T = 85\º, A = 15\º and \tau = 24\,h, the resulting function for the outside temperature is:

T(t) = 85\º + 15\º \cdot \sin \left[\frac{t-6\,h}{24\,h} \right]

3 0
3 years ago
5x+14<4 or -2(x-8)<-2
Kitty [74]

Answer:

Step-by-step explanation:

5x+14<4 or -2(x-8)<-2

    -14 -14      -2x+16<-2

5x<-10                -16  -16

÷5  ÷5           -2x<-18

x<-2              ÷-2   ÷-2

                     x>9   (sign changes because you divide by a negative number)

x<-2 or x>9

7 0
3 years ago
What is −5+(−5r)+10 =-5r+5
VikaD [51]

Answer:

Infinitely many solutions. Each real number is a solution of this equation.

Step-by-step explanation:

-5 + (-5r) + 10 = -5r + 5

5 - 5r = -5r + 5       <em>add 5r to both sides</em>

5 = 5   TRUE

7 0
3 years ago
Read 2 more answers
Solve equation 2x+3=2x
Digiron [165]
This is an impossible equation.

If you have something and you add 3 to it, how can the result be the same as the original?
3 0
3 years ago
Other questions:
  • adidas is ready to launch its new shoe line, but needs to determine what color the shoes should be so that customers will actual
    5·1 answer
  • What is the slope of the graph?
    13·1 answer
  • There is a book sale at the libaray the price for each book is $4 which expression can be used to show how much money the librar
    9·1 answer
  • In calculating interest by the previous balance method, purchases and payments during the month _____ counted in calculation of
    10·2 answers
  • What is the median of the following numbers: 9, 10, 4, 6, 3, 7, 8, 2, 5. 54 8 7 6
    6·1 answer
  • A line passes through the points (8, 8) and (4, 0). What is its equation in slope-intercept form?
    15·1 answer
  • THIS IS VERY IMPORTANT!
    13·2 answers
  • An alternating voltage of 240V,50HZ is connected across an impedance of (60-j100) Ω. Determine:
    6·1 answer
  • it was -11 degrees. She checked again later and it was -2 degrees . Express the change in tempature as a integer Help me !
    12·2 answers
  • You work as an office administrator and are paid $18.65 per hour and work 80 hours in 2 weeks. How much is your straight time pa
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!