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
Sergio039 [100]
2 years ago
7

PLS HELP.... If 4x^2 + bx + 9 = 0, where b is the constant, has exactly one solution, what is a possible value of b ?

Mathematics
2 answers:
IgorLugansk [536]2 years ago
3 0
You can use the discriminant rule, which is :
b^2 -4ac
“exactly one solution” means that it is equal to zero
so:
b^2 -4(4)(9)=0
b^2 -4(36)=0
b^2 -144=0
b^2=144
square root both sides
b=12 or -12

hope this helps !
Elden [556K]2 years ago
3 0

Answer:

Since the equn is quadratic and has equal roots, it's delta k^2–4*4*9 =0 => k= (+ or -) 2*2*3 = (+ or -) 12

Step-by-step explanation:i hope this is correct im so sorry if not aizawa

You might be interested in
All employees at three stores of a large retail chain were asked to fill out a survey.a. Is it random b. Systematic c. Stratifie
aleksandrvk [35]

Answer:

d. Cluster

Step-by-step explanation:

Random: Random is asking a group of people from a population. For example, to estimate the proportion of Buffalo residents who are Bills fans, you ask 100 Buffalo residents and estimate to the entire population.

Systematic: Similar to random. For example, you want to estimate something about a population, and your sample is every 5th people you see on the street.

Cluster:Divides the population into groups, with geographic characteristics.. Each element is the groups is used. Suppose you want to study the voting choices of Buffalo Bills players. You can divide into offense, defense and special teams, and ask each player of these 3 groups.

Stratified: Done on a group of clusters, that is, from each cluster(group), a number of people are selected.

In this problem, we have that:

All employees at three stores of a large retail chain were asked to fill out a survey.

Divided by clusters(stores).

So the orrect answer is:

d. Cluster

5 0
3 years ago
Use the distributive property to find the equivalent expression.<br> 3(2 + x) =__+__x
Simora [160]

Answer:

6+3x

Step-by-step explanation:

multiply each term in the parentheses by the outer term.

6 0
2 years ago
Read 2 more answers
EMERGENCY HELP! A steady stream of water flows into a partially-filled rectangular tank. After 6 minutes, there are 87 gallons o
german

Answer:

y=9x+33

33 gallons of water to begin with.

Step-by-step explanation:

So we essentially are given two coordinates: (6,87) and (21,222). To find an equation, we simply need to find the slope and y-intercept. We know it's a linear equation because it's a steady stream, meaning a constant slope.

The slope is:

m=\frac{y_2-y_1}{x_2-x_1}=\frac{222-87}{21-6}=135/15=9

So, the rate at which the stream flows is 9 gallons per minute.

Now, let's find the initial amount of water. To do this, we can use point-slope form. Pick either of the two points. I'm going to use (6,87).

y-y_1=m(x-x_1)\\y-87=9(x-6)\\y-87=19-54\\y=9x+33

So, there were 33 gallons of water in the tank to begin with.

3 0
3 years ago
One year, the population of a city was 209,000. Several years later it was 244,530. Find the percent increase
NeTakaya

Answer:

17%

Step-by-step explanation:

(244530—209000)/209000*100%=17%

4 0
3 years ago
PLEASE HELP ASAP TYVMM
Eddi Din [679]

Answer:

57

Step-by-step explanation:

its a right angel 33+57=90

6 0
2 years ago
Read 2 more answers
Other questions:
  • Oak City has 10,325 registered voters. A political research assistant randomly selects 100 voters to predict the outcome of the
    13·2 answers
  • Mr. Stevens is having flowers delivered to his house for his wife's birthday that cost $45.50 including tax. he wants to give th
    14·2 answers
  • Write the expression as the sine, cosine, or tangent of an angle. sin 8x cos x - cos 8x sin x
    5·2 answers
  • What is the recursive formula for this geometric sequence with this explicit formula?
    11·2 answers
  • A coconut is a fruit that is made up of a hard outer shell that is spherical. Inside, there is a thick layer of coconut meat
    7·1 answer
  • What is the slope of the line 4x+7y=9
    15·2 answers
  • Yo help me i sick at ixl
    8·2 answers
  • I'm reallly confused on how to solve this. I know that I need to find the whole though. If you answer this, please give me an ex
    8·1 answer
  • Find the slope of the line that passes through (10, 5) and (7, 4).
    10·2 answers
  • Who likes my quote… “you won’t be able to unlock the truth without locking the truth”.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!