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
DedPeter [7]
3 years ago
14

The graph of y=-5x^2 + 9 passes through (1,2a) in the standard (x,y) coordinate plane what is the value of a? .

Mathematics
1 answer:
ella [17]3 years ago
3 0
First you plug everything in to get
2a=-5 (1)^2+9 you do the powers and multiply
2a=-5 (1)+9
2a=-5+9
2a=4
a=2
You might be interested in
PLEASE HELP PLEASEE!!!!!!!!!!!!!!
Yakvenalex [24]

Answer:

B

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
find two positive real numbers such that they sum to 108 and the product of the first times the square of the second is a maximu
topjm [15]

The two positive numbers are 36 and 72 which gives a sum equal to 108 and the product of 36 and the square of 72 is a maximum.

Any integer greater than zero is considered a positive number. A positive number can either be written as a number or with the "+" symbol in front of it.

Let us consider the two positive real numbers as x and y. Then, their sum is written as,

x+y=108

Then, y=108-x

And the product is written as,

P=xy²

Substitute value of y in the above equation, we get,

\begin{aligned}P&=x(108-x)^2\\&=x(11664-216x+x^2)\\&=11664x-216x^2+x^3\\&=x^3-216x^2+11664x\end{aligned}

Now, differentiate P with respect to x, and we get,

\begin{aligned}\frac{dP}{dx}&=3x^2-432x+11664\\&=x^2-144x+3888\end{aligned}

Solving the above equation to zero, we get,

\begin{aligned}x^2-144x+3888&=0\\x^2-36x-108x+3888&=0\\x(x-36)-108(x-36)&=0\\(x-108)(x-36)&=0\\x&=\text{108 or 36}\end{aligned}

Substitute values of x in y=108-x, to get values of y.

If we substitute x=108, we get the y value as zero which doesn't give the required solution.

But, if we substitute x=36, we get,

\begin{aligned}y&=108-36\\y&=72\end{aligned}

Thus, the two positive numbers are 36 and 72.

To know more about positive numbers:

brainly.com/question/1635103

#SPJ4

4 0
1 year ago
Write each ratio statement as a fraction and reduce the two lowest terms 14:42
LuckyWell [14K]
<span>14:42 = 14/42 = 1/3 
</span>This ones right sorry answered wrong question lol
7 0
4 years ago
Read 2 more answers
How does the area of a circle change if the radius is multiplied by a factor of n, where n is a whole number?
Fantom [35]
Increases but is that what you are asking?
6 0
3 years ago
Explain why 0.32 is greater than 0.102
lyudmila [28]

Answer:0.32 is closer the the number one then 0.102 is

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Write a real world context for ratio of five to three
    5·2 answers
  • How many degrees are there in angle C?<br> ** multiple choice question
    12·2 answers
  • #11! Plzzz help Algebra 2 Honors :))))
    13·1 answer
  • 7th grade work ! I’ll give brainliest!
    9·1 answer
  • There are 9 showings of a film about endangered species at the science museum. A total of 459 people saw the film. The same numb
    12·1 answer
  • Can you help me with 22-25
    11·1 answer
  • What is f multiplied by -4 is -84
    5·2 answers
  • Find the value of x.<br><br> A. X = 90<br> B. X = 32<br> C. X = 30<br> D. X = 15
    12·2 answers
  • What is 5 Left-bracket cosine (StartFraction pi Over 4 EndFraction) + I sine (StartFraction pi Over 4 EndFraction) right-bracket
    12·2 answers
  • Help please need to pass this math test
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!