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
Verizon [17]
3 years ago
5

What is f(–3) for the function f(a) = –2a2 – 5a + 4?

Mathematics
1 answer:
victus00 [196]3 years ago
7 0
The answer is 31 why? you replace the variable with -3
So it's f (a)=-2 (-3)(2)-5 (-3)+4
f (a)=31 that is the final answer.
You might be interested in
Decide which estimate is closer to the actual answer. Explain your reasoning as store bought 25lb of produce if store spent $110
gregori [183]
they has to be one main number & that’s josie be less
4 0
3 years ago
In ΔBCD, the measure of ∠D=90°, the measure of ∠B=8°, and BC = 6.4 feet. Find the length of DB to the nearest tenth of a foot.
kipiarov [429]

Answer:

6.3

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
In ΔDEF, the measure of ∠F=90°, EF = 2.3 feet, and FD = 2.9 feet. Find the measure of ∠D to the nearest tenth of a degree.
Phoenix [80]

Answer:

\theta=38.42 \textdegree

Step-by-step explanation:

From the question we are told that:

Angle of F \angle F=90 \textdegree

Length of EF = 2.3 feet,

Length of FD= 2.9 feet,

Generally the equation for Angle D \theta is mathematically given by

Since \angle F=90.The triangle  is a right angle Triangle

Therefore

 tan \theta=\frac{EF}{FD}

 tan \theta=\frac{2.3}{2.9}

 \theta=tan^{-1} 0.793

 \theta=38.42 \textdegree

8 0
3 years ago
What is the answer using either the substitution method or elimination method
Sophie [7]

To solve this problem, I am going to use the substitution method.  To do this, we use our first equation given (s=4r-1) and substitute this given value for s (4r-1) and substitute it into the second equation so that we have an equation with only one variable.  This is modeled below:

s = 4r - 1

6r - 5s = -23

6r - 5(4r-1) = -23

Now, we can solve this equation as we would any other equation, using the order of operations outlined by PEMDAS.  To begin, we will distribute the factor of -5 through the parentheses on the left side of the equation.

6r - 20r + 5 = -23

Next, we should combine like terms on the left side of the equation:

-14r + 5 = -23

Next, we should subtract 5 from both sides of the equation to get the variable term alone on the the left side of the equation.  We get:

-14r = -28

Finally, we should divide both sides by -14 to get the variable r alone on the left side of the equation.

r = 2

Now that we know that value for the variable r, we can substitute this value into one of our original equations (either one will work, but I am choosing to use the first one):

s = 4r - 1

s = 4(2) - 1

Now, we can find the value for s by using multiplication and then subtraction to simplify the right side of the equation.

s = 8-1

s = 7

Therefore, your answer is s = 7 and r = 2.

Hope this helps!

8 0
4 years ago
A stack of ninety cards is placed next to a ruler, and the height of the stack is measured to be 3/4 inches. How thick is one ca
den301095 [7]
(3/4)/90
each card is 0.0083 inches thick
8 0
4 years ago
Other questions:
  • Please help with this question its in the picture :)
    13·2 answers
  • A football field is 300 feet long. A sloth moving very quickly travels 60 feet every 5 minutes. Based on this ratio, how many mi
    11·1 answer
  • mrs carter teaches a total of 80 students. of the students that she teaches, 30% will go on a field trip to the art museum along
    9·2 answers
  • Noralie has a home-based business putting on children’s parties. She charges $45 to design the party and then $5.50 per child. W
    14·1 answer
  • Order the numbers in each list from least to greatest.<br> 0, |−14|, 13, −12, |−16|, 17
    15·2 answers
  • On a separate sheet of paper, graph 3x+6y=18 enter the y value when x = 2.
    10·2 answers
  • Please help me.
    10·1 answer
  • What is the solution to this system of equations?
    6·1 answer
  • 2.19=2.14(5)^x<br> What does x equal
    7·1 answer
  • I am not sure how to solve this could anyone help???
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!